General Questions on Metals and Minerals & Chemistry
Q1. What is the major source of copper?
Azurite, Chalcocite, Malachite - minerals.
Q2. Which mineral is the source of Aluminium?
Bauxite.
Q3. Which mineral is the source of Zinc?
Calamine.
Q4. Which mineral is the source of Tin?
Cassiterite.
Q5. What is the major source of Lead?
Cerrusite.
Q6. Which mineral is the major source of Mercury?
Cinnabar.
Q7. What is the source of common salt?
Halite.
Q8. What is the main ore from which lead is extracted?
Galena.
Q9. What is the main mineral source for Iron?
Haematite.
Q10. Which mineral is the main source of sulphur?
Pyrite.
Q11. Which mineral is the main source of Titanium?
Rutile.
Q12. What is malleability?
Converting a metal into sheets.
Q13. In which solvent, gold can be dissolved?
Aqua Regia.
Q14. What is "pitch blend"?
An ore of Uranium.
Q15. What is the metal named after a Greek Goddess?
Vanadium - after Greek Goddess Vanadis.
Q16. What is "sugar of lead"?
Lead Acetate.
Q17. What is "Paris Green'?
Double salt of copper Acetate and Copper Arsenite.
Q18. What is "Agate"?
Naturally occurring Silica.
Q19. What is "Carborundum"?
Silicon Carbide.
Q20. What are "First Group Elements"?
Alkali Metals.
Q21. What are "Second Group Elements'?
Alkaline Earth Metals.
Q22. What is the basis for modern classification of elements?
Atomic Number.
Q23. What is the other name for inner transition of elements?
F Block elements.
Q24. Name two elements having lowest ionization energy?
Caesium and Francium.
Q25. What is the most electromagnetic element?
Fluorine.
Q26. What kind of elements generally form coloured compounds?
Transition Metals.
Q27. Name two elements having largest atomic size?
Caesium and Francium.
Q28. What is "Horn Silver"?
Ore of Silver - AgCl.
Q29. What is the name for process of extraction of Nickel?
Mond's process.
Q30. What is Cinnabar?
Ore of Mercury (HgS)
Q31. Brass is an alloy of.......?
Copper and Zinc.
Q32. Bronze is an alloy of .......?
Copper and Tin.
Q33. The most abundant element in earth's crust is.......?
Oxygen.
Q34. Glass is mostly produced by heating ........?
Lime Stone, Silica and Soda Ash at 1400 degreeC.
Q35. Solder is an alloy of.......?
Tin and Lead.
Q36. Name a metal that is liquid at 0 deg C?
Mercury.
Q37. What term expresses the purity of gold?
Carat (=200 milligrams).
Q38. What is the purest form of gold?
24 Carat.
Q39. German Silver is an alloy of?
Copper, Nickel and Zinc (Has no silver in it).
Q40. Which is the hardest metal?
Tungsten.
Q41. German Silver is used for?
Manufacture of resistance wire.
Q42. Gunmetal is an alloy of?
Copper, Tin and Zinc.
Q43. Gunmetal is used for the manufacture of?
Gears, Bearing, Valves.
Q44. What is the most reactive element?
Fluorine.
Q45. Alloys of Mercury are known as?
Amalgams.
Q46. Which element was used by Rutherford in his famous scattering experiments?
Gold.
Q47. What is the brightest form of Carbon?
Diamond.
Q48. Which is the rarest metal available on earth?
Rodium.
Q49. What is Nitinol?
An alloy of Nickel and Titanium.
Q50. What is 22 carat gold?
22 parts of gold + 2 parts of copper. (91.6% of gold).
Q51. What is Topaz?
Aluminium Fluoro Silicate - a precious yellow stone.
Q52. What are lead pencils made up of?
Graphite.
Q53. Which mineral is called "rock cotton"?
Asbestos.
Q54. What is Armacdite?
A mineral found on moon, not seen on earth.
Q55. Sapphire is the impure form of which mineral?
Corrundrum.
Q56. Ruby is the impure form of which mineral?
Aluminium Oxide.
Q57. Which is the most malleable of all metals?
Gold.
Q58. What is "pinchbeck"?
All alloy used for making imitation gold jewellery. It consists of copper and zinc.
Q59. Tincal is a mineral which has neither Tin nor Calcium. What is it then?
Impure form of Borax.
Q60. What is Britannia Metal?
An alloy containing Tin, Antimony and Copper.
Q61. From which ore did Marie Curie isolate Radium?
Pitchblend.
Q62. Lithium, a metal is derived from?
Lepidolite - a mineral.
Q63. What process is used for manufacturing Steel?
Bessemer Process - invented by Henry Bessemer.
Q64. What is "Metallography"?
The study of the constitution of metals.
Q65. What is "Isomorphism"?
Close similarity in crystalline forms of compounds.
Q66. What is "Gunmetal"?
Alloy of 9 parts of copper with 1 part of Iron.
Q67. What is the melting point of Tungsten?
3000 degreeC.
Q68. Why Tungsten is used in the manufacture of the filament of an electric bulb?
Because it has a very high melting point.
Q69. Which metals are used in transistors?
Germanium, Silicon, Celinium. Also used in Solar Batteries.
Q70. Which metal reflects the light rays most?
Aluminium.
Q71. Which glass darkens in sun light and lightens in darkness?
Photo Chromatic Glass.
Q72. Which alloy is used to bore rock?
Manganese Steel.
Q73. What is the metal through which x-ray does not pass?
Lead.
Q74. Fermium, an element is named after?
Enrico Fermi.
Q75. Mineral substances crystallizing and developing into patterns resembling the Outline of plants are known as.......?
Pseudofossils.
Q76. Who invented the Stainless Steel?
Harry Brearely of UK in 1912.
Q77. Which was the first metal made by man?
Copper.
Q78. Name the method used for the concentration of chromic ores is?
Gravity Process.
Q79. Which metal is used in aircrafts?
Titanium.
Q80. Which is the most commonly found mineral?
Silica.
Q81. Name an element that can easily form a chain structure?
Carbon.
Q82. What is used for cutting glasses?
Diamond.
Q83. What is the term used for the iron obtained from the blast furnace?
Pig Iron.
Q84. Which is the densest metal?
Osmium.
Q85. Which element has the smallest atom?
Hydrogen.
Q86. Which mineral is known as "fool's gold"?
Iron Pyrites.
Q87. Which alloy is used in joining metals?
Solder.
Q88. Which metal has the lowest melting point?
Mercury. Liquid at room temperature.
Q89. Which non-metal has the lowest melting point?
Helium.
Q90. Which element is formed in the Sun as a result of nuclear fusion?
Helium.
Q91. Name the electrolyte used for nickel plating?
Nickel Ammonium Sulphate.
Q92. What is the principal mineral in marble?
Calcite.
Q93. Which form of Iron contains high percentage of carbon?
Pig Iron.
Q94. Pentlandite is the chief ore for?
Nickel.
Q95. Which is the first alloy to be made in the world?
Bronze.
Q96. Which is the commonly used metal that was once precious than gold?
Aluminium.
Q97. Which is the bluish white metal used in galvanizing?
Zinc.
Q98. Which element has the greatest number of isotopes?
Xenon.
Q99. India is the largest producer of........?
Manganese.
Q100. Which element imparts corrosion resistance to steel?
Nickel.
Q101. India uses which element for nuclear explosions?
Plutonium.
Q102. Which alloy is used for preparing strong magnets?
Alnico - comprising aluminium, nickel and cobalt, besides Iron.
Q103. The most harmful radioactive element is ........?
Radium.
Q104. Which is the most ductile metal?
Gold.
Q105. Which metal is used to control neutron flux in an atomic reactor?
Cadmium
Q106. Which metal is used to control neutron flux in an atomic reactor?
Cadmium.
Q107. Which metal is used in the manufacture of bullet proof steel?
Zirconium.
Q108. Which group of elements are used in making super conductors?
Lanthanides.
Q109. Which element is refined by electrolysis?
Copper.
Q110. Which elements have zero valency?
Noble gases.
Q111. Which element has the density less than water?
Sodium.
Q112. Which type of coal has the highest carbon content?
Anthracite.
Q113. Which metal is used to make the shield of a reactor?
Lead.
Q114. Which metallic element is alloyed with copper to make electric cables?
Cadmium.
Q115. The metals that cannot be classified either as metal or non-metal are called?
Metalloids.
Q116. The crystalline allotropes of carbon are.......?
Graphite and Diamond.
Q117. What is calcinations?
Heating in the absence of air.
Q118. What is Halogen?
Any of the five very active, non-metallic chemical elements - Fluorine, Bromine, Astatine and Iodine.
Q119. Which Halogen is most powerful oxidizing agent?
Fluorine.
Q120. What is the first element in the Periodic Table?
Hydrogen.
Q121. Which is the most abundant element in the Sun?
Hydrogen.
Q122. What is the active non-metallic element?
Fluorine.
Q123. What is sulphide or sulfide?
A compound of Sulphur (sulfur) with another element or radical.
Q124. What is the common suphide ore of copper?
Cryolite.
Q125. Which scale is used to determine the hardness of minerals?
MOH's scale with the highest number at 10.
Q126. What is the metal present in chlorophyll of plants?
Magnesium.
Q127. What is the unit of weight of precious stones including gold?
Carat = 200 mg.
Q128. Which metal compound is used to remove Carbon-di-oxide from the air?
Silver Carbonate.
Q129. Which metal compound made in transparent conditions is used as a cement for glass?
Silver Chloride.
Q130. Which silver compound is used as a powerful explosive?
Silver Fulminate.
Q131. Which silver compound is used for cloud seeding for rains?
Silver Iodide.
Q132. Which silver compound is an important compound widely used for photo Processing?
Silver Nitrate.
Q133. Which silver compound is used as a positive electrode (cathode) in watch Batteries?
Silver Oxide.
Q134. What type of iron has the high carbon content?
Pig Iron with 3.5 to 5% carbon content.
Q135. Iron Acetate compound is used for .......?
Dyeing of fabrics.
Q136. Which iron compound is used in Blue Prints(architectural diagrams)?
Iron Ammonium Oxalate.
Q137. Which iron compound is used in insecticides?
Iron Arsenate.
Q138. Which iron compound is used as a brown pigment in rubber?
Iron Hydroxide. Also used for water purification
Q139. Of the various iron compounds, Iron Chloride is most used in various Fields. What are they?
Water purification, sewage treatment, fabric dyeing, colouring agent of Paints, animal feed, photography, printed circuits and as etching on engravements.
Q140. Which iron compound is used for leather tanning?
Iron Acetate.
Q141. Which iron compound is used as a dietary supplement?
Iron Gluconate.
Q142. Which iron compound is used as a "yellow pigment" for various purposes?
Iron Oxalate and Iron Chromate.
Q143. What is the use of "iron sulphate" compound?
Water purification, sewage treatment, as a catalyst in ammonia production, as an ingredient in fertilizer and herbicide, as a wood preservative and as an additive in flour to increase iron level.
Q144. What is the carbon content of Steel?
0.02 to 1.7% - varies for different grades of steel.
Q145. What is the process by which steel is produced?
Bessemer process.
Q146. Springs and ropes are made of which steel?
High Carbon Steel.
Q147. What steel is used to manufacture quality knives, axles and punches?
Ultra High Carbon Steel.
Q148. What lead compound is used in lead acid batteries?
Lead di-oxide.
Q149. Which lead compound is used in cosmetics and hair colouring products?
Lead Acetate.
Q150. Hydrogen Sulphide is a poisonous gas. It is detected through the use of?
Lead Acetate coated paper, as the gas reacts with lead acetate.
Q151. Which lead compound is highly sensitive and has to be stored in inslulated water containers?
Lead Azide - Highly explosive and toxic crystalline.
Q152. Which lead compound is an important ingredient for the manufacture of white paint?
Lead Chloride.
Q153. Which lead compound is used as "Chrome yellow" in making paints?
Lead Chromate.
Q154. Which lead compound is used in the manufacture of infrared detectors?
Lead Selenide.
Q155. Which lead compound is used in car batteries?
Lead Sulfate.
Q156. Betterton Kroll Process and Betts process are related to?
Extraction of lead.
Q157. An aluminium compound when used with an astringent can shrink or constrict body tissues. What is it?
Aluminium Acetate.
Q158. Which aluminium compound is used in the manufacture of glass and ceramics?
Aluminium Borate.
Q159. Which aluminium compound is used in petroleum refining and in the manufacture of synthetic rubber?
Aluminium Chloride.
Q160. Which aluminium compound is used in the treatment of "Hyperhidrosis" - Abnormally increased perspiration?
Aluminium chlorohydride.
Q161. Which aluminium compound is used as a dental cement?
Aluminium Phosphate.
Q162. Which type of Brass is called the "Princess Metal"?
Alpha Brass (35% Zinc + 65% copper).
Q163. Which gemstone comes in Torquoise Blue - sea water color?
Aquamarine.
Q164. Pearl, a gem melts in.......?
Vinegar.
Q165. What is the metal used in storage batteries?
Lead.
Q166. Which alloy has the least metal in it?
Invar Steel. Discovered by Charles Edouard Guillaume in 1896. He received Nobel Physics Prize for this discovery in 1920.
Q167. Which light ray has the capacity to cut metals?
Laser (Light Amplification by Stimulated Emission of Radiation).
Q168. Which form of Aluminium is used to make coins?
Aluminium Bronze.
Q169. Properties of elements are determined by.......?
Atomic Number.
Q170. Which metals are in liquid state at room temperature?
Gallium, Mercury.
Q171. Which metal is not affected by air and water under normal conditions?
Platinum.
Q172. Which metal has the unique tendency to readily combine with itself to form Long molecules of atoms linked in long chains?
Carbon.
Q173. Stainless Steel is an alloy of.......?
Iron, Chromium and Carbon.
Q174. Chemical name of Quartz is.......?
Sodium Silicate.
Q175. Elements in the same group have similar........?
Chemical properties.
Q176. The least reactive elements of the periodic table are.......?
Noble gases.
Q177. Which element is also called "Brimstone"?
Sulphur.
Q178. Who gave the law that properties of elements are periodic functions of Their atomic numbers?
Moselely.
Q179. What is the least element alphabetically?
Zirconium.
Q180. Which is a pure substance made up of one type of atom?
An element.
Q181. Which is the first element to be named after a living person?
Seaborgium - named after Nobel Laureate Glen Theodore Seaborg.
Q182. Which is the most abundant mineral in the Earth's continental crust?
Quartz.
Q183. What is the color of the semi-precious stone "Lapis Lazuli"?
Blue.
Q184. What is the name for the alloy of tin with copper and antimony?
Goes Pewter.
Q185. What form of Mineral is Aquamarine?
Beryl (Beryllium Aluminium Silicate - a very hard crystalline material). Emerald also belong to this category.
Q186. Which metal was used to build the Statue of Liberty?
Copper.
Q187. Which essential, a common element, shares its Atomic Number with the fourth natural prime?
Nitrogen (7).
Q188. At what temperature platinum melts?
1843 degree C.
Q189. Who invented MOH's scale?
Friedreich Moh, Germany.
Q190. What mineral is extensively used in the manufacture of paint, glazed tiles, Ceramics, paper, rubber etc.,?
Talc.
Q191. Which chemical elements are named after Earth and Moon?
Tellerium - Earth. Selenium - Moon.
Q192. What is the major source of Silicon?
Sand.
Q193. What colour is liquid and solid oxygen?
Pale Blue.
Q194. Which is the second most abundant element on earth's crust?
Silicon. ( First is oxygen).
Q195. After which Italian Savant is the number of particles in mole of a substance Named?
Amedeo Avogadro.
Q196. Which element has close to one crore known compounds?
Carbon.
Q197. What is the element named after Alfred Nobel?
Nobelium.
Q198. Which metal is always present in an amalgam?
Mercury.
Q199. Which district of India has the largest lime stone reserve?
Chandrapur, Maharashtra.
Q200. How did Armacolite, a mineral from Moon get its name?
From the name of Armstrong, Aldrin and Collins.
Q201. What is "Copper Belt"?
A region in Central Africa famous for large copper deposits.
Q202. Which tribal region of India has 70% of Bauxite reserve?
Kashipur - Odisha.
Q203. What would increase the calorific value of coal?
A process called Enzyme Wash.
Q204. Misch Metal is a mix of rare earth metals. Where is it used commonly?
Cigarette Lighter. It is used in the flint ignition device of it.
Q205. Which gemstone has the highest carat value?
Ruby.
Q206. What is the composition of Gun metal?
Copper 86% + Tin 9.5% + 2% Zinc and 2.5% lead. This combination will vary in a very small quantity for producing different products.
Q207. Which element has the largest known compounds?
Carbon - close to 10 million compounds.
Q208. Helenium, Selenium and Uranium are named after.......?
Helenium - Sun; Selenium - Moon; Uranium - Uranus.
Q209. After diamond, which is the hardest stone found in nature?
Sapphire.
Q210. What indicates the presence of copper in a burning material?
Blue Flame.
Q211. What happens to Alkali Metals when exposed to water?
Explode.
Q212. Which is the lightest chemical element with no stable isotope?
Technetium.
Q213. Hafnium gets its name from?
Latin name for Copenhagen (Denmark).
Q214. Britannium is an alloy of.......?
93% Tin + 5% Antimony + 2% Copper.
Q215. What is EPNS in the metal world?
Electro Plated Nickel Silver.
Q216. Platinum melts at .......?
1843 degreeC.
Q217. Berkelium is named after.......?
Berkeley -A city of US
Q218. Which metal forms part of Black and White films?
Silver.
Q219. What is essential for the iron to rust?
Oxygen.
Q220. Which is the lightest metal?
Lithium.
Q221. Fire Assay is a test associated with.......?
Gold - to test its purity.
Q222. Sterling Test is associated with.......?
Silver - to test its purity.
Q223. Cerium - the element is named after?
The world's largest known asteroid - Ceres.
Q224. What are the two radioactive elements mostly used in Nuclear Reactors?
Plutonium and Uranium.
Q225. Which country is the largest producer of copper?
US
Q226. Which country is the world's leading producer of Mica?
India.
Q227. Italy is the world's leading producer of.......?
Mercury.
Q228. Which African country is the leading producer of Uranium?
Zaire.
Q229. Which country is the world's leading producer of Coal?
US
Q230. Which country mines most copper in the world?
Chile.
Q231. Which country has the largest deposits of Uranium?
Australia.
Q232. What is alcohol?
A colourless, volatile and flammable liquid synthesized or fermented through Sugars and starches. Contains Hydroxyl (-0H)group.
Q233. What is the simplest of the alcohol group?
Methyl alcohol or Methanol.
Q234. What are alkali metals?
Group of elements that reacts with water to form alkalies. Eg: Sodium, Potassium, Rubidium, Caesium.
Q235. What is Alkane?
Simple hydrocarbons that are commonly called "Paraffins". Eg: Methane CH4.
Q236. What is Allotropy?
The existence of elements in more than one form in the same physical state, that is the existence of two or more crystalline or molecular structural forms of an element. Eg: Carbon has Diamond and Graphite.
Q237. What is Anhydride?
A chemical compound formed from another by the removal of water.
Q238. What is the composition of Aqua Regia?
Nitric and Hydrochloric Acid in the ration of 1:3.
Q239. What is Atomic Number?
Number of Protons in the atomic nucleus of an element.
Q240. What is Azetropic Mixture?
A mixture of two or more liquids that cannot be separated by distillation.
Q241. What is the boiling point of water?
100 degree C.
Q242. What is Base?
A chemical substance which reacts with and neutralizes an acid to give a salt and water. Eg: Calcium Hydroxide, Magnesium Hydroxide.
Q243. What is an Aromatic Compound?
An organic compound derived from Benzene. Has a powerful and pleasant aroma.
Q244. What is a Carbonate and how does it occur in nature?
A compound made from Carbonic Acid (H2CO3).. In nature they occur as Chalk or Lime Stone.
Q245. What are Carbohydrates?
Large group of organic compounds found in most foods. They contain Carbon, Hydrogen and Oxygen. Eg: Starch, Cereals, Sugar etc.,
Q246. What is Chemical Bond?
The force that holds atoms and ions together.
Q247. What is a Colloid?
A mixture or suspension of very fine particles within a fluid as in fog or paint.
Q248. What is a Catalyst?
A substance that affects the rate of chemical reaction without itself being consumed in process. It accelerates the chemical action. The process is called Catalysis.
Q249. What is Condensation?
A process of reduction to a denser form such as vapour to liquid.
Q250. What is Corrosion?
Destruction of body of a metal by chemical action or electro chemical attack.
Q251. How the corrosion can be prevented?
By giving the metal a protective coating of paint, bitumen, plastic, Galvanization (zinc coating) and electroplating.
Q252. What is a crystal and give a few examples?
A solid pattern of substance compound of a group of atoms or molecules which is repeated in space to form a regular structure. Eg: Common Salt, Sugar, Diamond.
Q253. What is a Carbide?
Combination of Carbon with a metal and sometimes with a non-metal.
Q254. What is Decantation?
The process of separating a solid held in suspension in a liqluid by allowing the former (solid) to settle down after which the liquid is poured out.
Q255. What is Deliquescence? Give an Example?
A property possessed by some substances of absorbing moisture from air on exposure. Eg: Anhydrous Calcium Chloride which has this property is widely used as a drying agent.
Q256. What is Dessication?
The process of drying or removal of moisture from a substance.
Q257. What is Diffusion? Give an Example?
The natural process by which one gas is disseminated through another, or, a process by which one material moves through another, from a state of high concentration to one of low concentration. Eg: Odour diffusing through air.
Q258. What is Dopant?
An impurity added to a pure substance to alter the purity of the substance.
Q259. What is Distillation?
The process of converting a liquid into vapour and then condensing this Vapour into liquid form again. Eg: Distilled water.
Q260. What is Double Salt?
A compound of two salts formed by the crystallization of a liquid solution, containing both of them.
Q261. What is Electrolysis?
A compound which in molten state or when dissolved in solution dissociate Into oppositely charged ions.
Q262. What are Electrons?
Negatively charged particle orbiting the atomic nucleus.
Q263. What is Emulsion?
A colloidal dispersion of one liquid in another.
Q264. What is Ester?
An organic compound obtained by reaction of an acid with alcohol and has a fruity smell. In nature, ester gives the smell for the flowers and the flavour for the fruits.
Q265. What is Ether?
An organic compound made from alcohol. It is volatile, heavier than air, Inflammable and is only slightly soluble in water.
Q266. What are Fatty Acids?
The organic carboxylic acids occurring in fats and oils. They occur not as acid itself but as a glycerol, an ester derived from the alcohol.
Q267. What are most common fatty acids?
Palmitic, Stearic, Oleic, Lineoleic.
Q268. What is fermentation?
The chemical changes brought about by living organisms like yeast, bacteria Etc., Eg: Conversion of glucose and cane sugar into alcohol and carbon di oxide.
Q269. What is Glycerine?
A colourless thick liquid prepared by the hydrolysis of fats and oils. Also called Glycerol.
Q270. What are the elements belonging to the Halogen group?
Fluorine, Chlorine, Bromine, Iodine, Astatine.
Q271. What are the contents of Hard Water?
Hard Water contains salts of Calcium and Magnesium.
Q272. What is the content of Heavy Water?
Containing "Deuterium" - an isotope of Hydrogen.
Q273. What are the six gases called "Noble Gases"?
Helium, Neon, Argon, Krypton, Xenon, Radon.
Q274. Which is the lightest of the noble gases?
Helium.
Q275. What is Hydrocarbon?
An organic compound of Carbon and Hydrogen. - Eg: Methane CH3
Q276. What are ideal gases?
Gases that conform accurately to the gas laws. Eg: Nitrogen and Hydrogen are the only two gases closest to be called ideal gases.
Q277. What are ions?
An Atom or group of Atoms which has either gained or lost electrons from its normal complement.
Q278. What are Isomers?
Refers to different organic compounds having the same number of atoms of The same element arranged in a different manner. Isomers have the same Basic chemical formula.
Q279. What are Isotopes and give a few examples?
An atom of an element having the same number of neutrons. Eg: Boron, Silicon, Arsenic, Antimony.
Q280. What is Mass Number?
Total number of protons and Neutrons in the nucleus of an atom.
Q281. What is Litmus Paper?
A dyed blue paper that turns red when treated by acids, but remains or reverts to blue when treated by alkalies.
Q282. What are Metalloids and give a few examples?
Elements having both metallic and non metallic properties. Eg: Boron, Silicon, Arsenic, Antimony etc.,
Q283. What is Molecular Weight?
Ratio of the weight of one molecule of a compound with that of one atom of Carbon 12 taken as 12.
Q284. What is a Molecule?
The smallest particle of a compound that is capable of independent existence. The properties of a compound are the properties of its molecule.
Q285. What is Neutralization?
A process in which acid and alkali react together and the resultant solution Is neutral to litmus paper.
Q286. What is Neutron?
Electrically neutral particle in the nucleus of an atom.
Q287. What is Nucleus?
The positively charged central core of an atom containing protons and neutrons.
Q288. What is Octane?
A hydrocarbon of paraffin series occurring in fuel gases.
Q289. What is Osmosis?
The diffusion of substances from one solution to another through a Semipermeable Membrane due to a difference in concentration of the solutions.
Q290. What is oxidation?
Adding of oxygen to compound or removal of hydrogen from it. A reaction in which atoms, molecules or the like gain electron.
Q291. What is Oxide?
A compound in which oxygen is combined with another element.
Q292. What is Ozone?
An allotropic form of oxygen, found between 15-30 Km above the ground in the atmosphere. Protects from sun's radiation.
Q293. What is Pasteurization?
The process of killing bacteria or retarding their growth in milk, by heating it to a temperature of about 67 degreeC and chilling it.
Q294. What is pH value?
A measure of acidity of alkalinity of a solution expressed in numbers and Measure of Hydrogen ions by the equation of pH= -log(1/H+).
Q295. What is polymerization or precipitate?
The formation of an insoluble chemical compound or residue in a solution, as a result of chemical reaction.
Q296. What is a Proton?
The positively charged heavy particle of the neucleus of an atom, having Equal and opposite charge to that of an electron.
Q297. What is Radical?
A group of atoms that stay together when a compound dissociates, but yet Not a stable group to qualify as a molecule.
Q298. What are Rare Gases?
Chemically inactive or inert gases. Eg: Argon, Krypton, Xenon, Radon etc.,
Q299. What are Rare Earths?
Any group of metallic elements with atomic numbers 57 to 71. They are also called "Lanthanides".
Q300. What are Reagents?
A chemical commonly used in chemical laboratories for experiments and Analysis. Eg: Hydrochloric Acid, Ammonium Hydroxide, Dilute Nitric Acid.
Q301. What are "Real Gases"?
The gases which do not conform to ideal gas laws.
Q302. What is a "Salt"?
A product formed as a result of acid base reaction. It is formed when the Hydrogen in an acid is replaced by a metal. Eg: Potassium Nitrate, Calcium Sulphate.
Q303. What is Known as "Common Salt"?
Sodium Chloride (NaCL) - is a salt in the chemical sense, but is also called a "Common Salt".
Q304. What is Saponification?
The reaction in which esters are hydrolyzed with the help of alkalies into acids and alcohol.
Q305. What is "Slag"?
A non metallic material obtained during smelting of ores.
Q306. What is "Sublimation"?
Conversion of a solid directly into vapour, or, the process of change from the Solid to the gaseous state or from the gaseous to solid state without becoming a liquid.
Q307. What is "Sulphonation"?
The process in which one of the Hydrogen atoms of the same organic compound is replaced by a Sulphonic group. (-SO2OH)
Q308. What are the three states of matter?
Solid, Liquid and Gas.
Q309. What is the fourth state of matter ?
"Plasma" where negatively charged ions are in flux.
Q310. What are "Transuranium"?
Those man made elements that have a higher atomic number (number of Protons in the nucleus) than Uranium at No.92. Eg. Plutonium (Pu) - 94.
Q311. What is valency?
The combining capacity of an element measured by the number of hydrogen Atoms which combine with or are displaced by, an atom of other elements.
Q312. Brown Ring Test is used for?
Chemical analysis of Nitrates. If nitrate is present in a substance, a brown Ring is formed ( See under Brown Ring Test).
Q313. Flame Test is used for?
To identify the elements present in a mixture, using a clean platinum wire.
Q314. Beilstein's Test is used for?
Used for the detection of halogen in an organic compound.
Q315. Fehling's Test is used for?
Detecting sugars and aldehydes in a solution.
Q316. Kjedahl Test is used for?
Used to measure Nitrogen in an organic compound.
Q317. Molish's Test is used for?
Used to detect carbohydrates in a solution.
Q318. What is Rast's Method?
Used to determine molecular weight by measuring the depression of Freezing point of a camphor by a known weight of the solute.
Q319. What is Schiff's Test?
Used to distinguish aldehydes and Ketones.
Q320. Which process is used for conversion of pig iron to steel?
Bessemer process.
Q321. What is Clemmensen reduction?
A process used to convert aldehydes and ketones to the corresponding Hydrocarbons.
Q322. What is the name for the industrial process of producing ammonia?
Haber Process.
Q323. Kolbe Reaction is a method for?
Preparation of saturated or unsaturated hydrocarbons.
Q324. What is Solvay Process?
A process of snaking sodium carbonate from calcium carbonate and Sodium chloride in a large scale.
Q325. What is Bayer Process?
A process used to extract Aluminium Oxide by treating Powdered bauxite.
Q326. What is "Bergius Process"?
A process for making lubricants and synthetic fuel. Eg: Petrol.
Q327. What is "Bosch Process"?
Process used to make industrial hydrogen.
Q328. What is "Down Process"?
A process of making sodium metal by electrolysis of molden sodium chloride.
Q329. What is "Frasch Process"?
Used to extract sulphur from subterranean deposits.
Q330. What is Harl-Heroult Process?
A process used to prepare aluminium by electrolysis.
Q331. What is "Parkes Process"?
A process used for extraction of silver traces from lead ore Galena.
Q332. What is the chemical name for Bleaching Powder and what are its contents?
Calcium Hypochlorite - contains Calcium, Chlorine and Oxygen.
Q333. What is the chemical name for Chalk and What are its contents?
Calcium Carbonate - contains Calcium, Carbon, Oxygen.
Q334. What is the chemical name for Caustic Soda and what are its contents?
Sodium Hydroxide - contains Sodium, Hydrogen and Oxygen.
Q335. What is the chemical name for Baking Soda and what are its contents?
Sodium Bicarbonate - contains Sodium, Hydrogen, carbon, Oxygen.
Q336. What is the chemical name for Common Salt and its contents?
Sodium Chloride - contains Sodium and Chlorine.
Q337. What is the chemical name for Epsom Salt and its contents?
Magnesium Sulphate - contains Magnesium, Sulphur and Oxygen.
Q338. What is the chemical name for Hypo and its contents?
Sodium Thiosulphate - contains Sodium, Sulphur, Hydrogen and Oxygen.
Q339. What is Laughing Gas and its contents?
Nitrous Oxide - contains Nitrogen and Oxygen.
Q340. What is the content of Gypsum?
Calcium Sulphate, Calcium, Sulphur and Oxygen.
Q341. Who is considered as the father of modern chemistry?
Joseph Priestly - also called the father of Soda Pop.
Q342. What is the chemical name for Plaster of Paris and its contents?
Calcium Sulphate - contains Calcium, Sulphur, Hydrogen, Oxygen.
Q343. What is the chemical name for Quartz and its contents?
Sodium Silicate - contains Sodium, Silica and Oxygen.
Q344. What is the chemical name for Quicklime and its contents?
Calcium Oxide - contains Calcium and Oxygen.
Q345. What is the chemical name for Washing Soda and its contents?
Sodium Carbonate - contains Sodium, Carbon, Hydrogen, Oxygen.
Q346. What are Soaps?
Alkali Salts of higher fatty acids.
Q347. What is the chemical content of Washing soaps and their functions?
Washing Soap = Sodium Salt of Strearic Acid. Toilet Soap = Potassium Salt of Oleic Acid. These soaps contain a charged COONa+ end and a hydrocarbon end CnH2n+1.The charged end has a tendency to interact with polar Substances like water and fibre, while the hydrocarbon part interacts with non-polar material like oil.
Q348. What is the content of Glass in its manufacture?
It is a mixture of an alkali silicate with the silicate of a base, that is, Silica Sodium Silicate (Na2SiO3) and Calcium or Lead silicate. The Materials thus used for manufacture of Glass are Sand (Silica), Soda Ash, (sodium Carbonate) and Lime Stone (Calcium Carbonate).
Q349. What is the process in the manufacture of Glass?
The selected materials - sand, soda ash and lime stone - are mixed in the required proportion. Broken pieces of previously made glasses (called Cullet) are added to help in easier fusion of the mixture. Then the mixture is heated upto a temperature of 1400 degreeC in a rotary furnace. The resultant mixture is fresh glass, to be blown and moulded to different shapes.
Q350. What is the basic materials required for Cement?
Calcium Carbonate (lime stone, chalk), Aluminium Silicate (clay) and small quantity of Gypsum. The Chemical formula is CaSO4 2H2O
Q351. What is the best cement and its average composition?
Portland Cement. Its average composition are: CaO - 63%, MgO - 1.5%, SiO2 - 21%, Al2O3 - 7%, Fe0O3 - 3%, Alkali - 0.50%, SO3 - 1.5%.
Q352. What is the process in manufacturing cement?
The raw materials are ground to a fine powder. It is then heated to a temperature of 1890 degreeK in a kiln where Calcium Oxide from limestone combines with aluminium silicate to form Calcium Silicate and aluminate. The resultant mixture is mixed with 2 to 3% gypsum and ground again to form cement.
Q353. What is Coal, how it originates and what are its uses?
It is a fossil fuel originating from the remains of trees, bushes, ferns, mosses other forms of plant life. Important products are derived from coal by a process called "Pyrolysys" - heating of coal in the absence of air, which produces coke (residue) and volatile matter such as coal gas and liquid known as Coal Tar.
Q354. What is Carbon?
An abundant element found earth's crust, ranking first among the elements in terms of importance.
Q355. What is the unique characteristics of Carbon?
It readily combines with itself to form large molecules of carbon atoms linked in lang chains (rings). In all these there are more than a million such combinations.
Q356. What are the different forms of Carbon?
1. Diamond 2. Graphite 3. Charcoal 4. Lamp Black 5. Coke 6. Gas Carbon 7. Coal and 8. Animal Charcoal.
Q357. What are the allotropic forms of Carbon?
There are two allotropic forms of Carbon 1. Diamond 2. Graphite (coke, Charcoal, Lamp Black).
Q358. What is Graphite?
An element that is dark grey, opaque solid with a soapy touch, and has a Metallic shine.
Q359. What are the characteristics of Graphite?
Good conductor of electricity and heat. Does not undergo any change when mixed with acids or alkalies. However, when heated with Nitric Acid, graphite acid is formed.
Q360. What are the uses of Graphite?
Used as a lubricant, in paints, for making electrodes and lead pencils.
Q361. How pure Graphite is produced?
By heating coke in an electric furnace to a temperature of about 2500 degreeC in the absence of air.
Q362. What is Petroleum?
A mixture of hydrocarbons believed to have originated from bacterial decomposition of animal and vegetable fats under high pressure and atmospheric temperatures.
Q363. What are the derivatives from Petroleum?
Petroleum actually comes in crude condition called the "Crude Oil". It is then converted into a variety of products by a process called "Fractional Distillation", based on the principle that lower hydrocarbons boil at a lower temperature than the higher ones. Based on this principle, the distillation process has been classified as light, intermediate, heavy distillates and the residues. The products thus derived are: 1. Gaseous Hydrocarbons 2. Petrol or Gasoline 3. Kerosene 4. Lubricating Oils 5. Petroleum Jelly 6. Paraffin Wax 7. Asphalt 8. Petroleum Coke (Bitumen and Coke).
Q364. What is the similarity between Diamond and Graphite?
Both are allotropes of carbon having different crystal structures and Different properties. But their chemical symbol is the same and show similar chemical properties. Both have same chemical symbol C and both emit carbon di oxide when strongly heated in the presence of oxygen. C (Diamond) + O2 (gas) g CO2 (gas). C (Graphite) + O2 (gas) g CO2 (gas).
Q365. What is LPG?
Liquefied Petroleum Gas: Also called "Domestic Gas". It is a by product of petroleum refining and also obtained from natural gas. It is a mixture of hydrocarbons like propane, butane and pentane. These gases are liquefied under moderate pressure at normal temperature. They have a very low boiling point - - 44 degreeC and therefore stored under pressure in a liquid state in gas cylinders.
Q366. What is synthetic rubber?
A rubber produced by polymerization of the hydrocarbons like - 1. Neoprene - a polymer of chloroprene. 2. Buna - S -- a polymer of styrene and Butadiene. 3. Buna - N -- a polymer of Butadiene and a crylonitrite.
Q367. What is the name of the process by which rubber is hardened?
Vulcanization - heating rubber with sulphur.
Q368. What is Nylon, when and how was it processed?
A synthetic fibre developed in 1928. It is a polyamide mde by polymerizing Adepic acid and hexamethylene diamine.
Q369. What is Terelene?
A synthetic fibre made from terephthalic acid and Ethylene Glycol.
Q370. What is Plastic?
They are also synthetic materials which are neither rubber nor fibre but are Used as a substitute and are called plastics. It is basically a polymer of acetylene (the common gas used for welding). The polymer is obtained by treating Acetylene gas under pressure in presence of a catalyst. The result is a long chain molecule.
Q371. What is Radioactivity?
A phenomenon of spontaneous disintegration of elements. It is the property of the nuclide to disintegrate in which a transformation takes place - of a relatively unstable nuclide to a relatively stable nuclide, accompanied with the emission of particles or electromagnetic radiation. The nuclide that decays is said to be radioactive.
Q372. Who are the people to discover the phenomenon of radioactivity?
1. First by French Physicist Henry de Becquerel in 1896 with Uranium. 2. Secondly, by Pierre and Madam Curie showed similar phenomenon in Other metals like francium, radium etc.,
Q373. What does the radioactive emission contain?
The emission contains the following rays: 1. Alpha: Positively charged Helium atom which has very little penetrating power. They can be absorbed by a sheet of paper or stopped by aluminium foil. 2. Beta: A negatively charged light particle. Its penetrating power is greater than that of Alpha ray. 3. Gamma: Electromagnetic radiations of low wave length, high frequency, and high energy. Their penetrating power is very great as they can pass through several centimeter of lead. Obviously, the Gamma rays are the most deadly.
Q374. What is X-ray?
A form of penetrating electromagnetic radiation similar to light but of shorter wavelength and capable of penetrating solids. Xrays are produced when cathode rays fall on anti-cathodes - a metal of high atomic mass like Tungsten. It can pass through considerable thick matter without getting entirely absorbed, although a fraction of it is always lost. Metals and bones, which are dense and strong, absorb xrays more strongly than softer materials like wood or flesh, That is why, xray is used in medical diagnosis to get xray photographs.
Q375. Who invented x ray?
Wilhelm Roentgen - Germany. For this invention, he became the first person Nobel Physics Prize in 1901.
Q376. What is Nuclear Reaction?
A reaction in which a nucleus is bombarded with an elementary particle like Neutron, proton etc., or with another nucleus to produce other products (energy) in a very short time span.
Q377. Who first discovered the Nuclear Reaction?
Ernest Rutherford in 1917 when he bombarded Nitrogen with alpha particles in the process, he also identified the Protons.
Q378. What is Nuclear Fission? Who was the first to experiment it?
The fragmentation of a large nucleus into two smaller nuclei and the liberation of large amount of energy. Two German scientists Ottohahn and F.Steersman observed that when Uranium was bombarded with slow neutrons, then two smaller products were obtained with a huge amount of heat. In short, splitting of Uranium was called Nuclear Fission.
Q379. What are the types of Nuclear Fission?
1. Controlled Nuclear Fission: Carried out in Nuclear Reactors in which rate Of fission reaction is reduced and energy produced for various purposeful uses. 2. Uncontrolled Nuclear Fission: It takes place in an atom bomb. A very large amount of heat is produced and the process continues until the entire amount of fissionable material is exhausted. A destructive reaction.
Q380. What is Nuclear Fusion?
A nuclear reaction in which, lighter nuclei fuse to form a nucleus of greater mass. Here again, an enormous amount of heat is produced. By carrying on nuclear fusion under controlled conditions, large amount of energy is produced and can be used for useful purposes.
Q381. What is Atomic or Nuclear Energy?
Energy produced by nuclear fission or fusion is called so. In nuclear reactions There is loss of mass. This mass converted into energy (both electrical and Mechanical) and used for various purposes.
Q382. What is Boson?
A sub-atomic particle - named after Satyendranath Bose, the famous Indian Scientist.
Q383. What is the unit of Radioactivity?
Curie.
Q384. What is the SI derived unit for measuring the catalytic activity of a catalyst?
Katal (measured in moles per liter per second).
Q385. What happens when steam is passed over hot iron?
Ferric Oxide and Hydrogen are produced. 3Fe + 4H2O g FeO4 + 4H2
Q386. Ferric Oxide gives.............................colour in glass?
Brown.
Q387. Isomers have the same .....................?
Molecular formula.
Q388. What is Zeigler-Natta-Catalyst?
Mg + H2O g MgO + H2
Q389. What happens when steam is passed over magnesium?
Hydrogen is formed along with Manganese Oxide. C + H2O g CO + H2
Q390. By the addition of what blue colour is imparted to glass?
Cobaltous Oxide.
Q391. By adding Selenium Sulphide to glass, what colour is obtained in glass?
Ruby Red.
Q392. What is "Bordeaux Mixture"?
Mixture of CuSO4 + Ca(OH)2 .
Q393. What is the last element of the Periodic Table that occurs in nature?
Uranium.
Q394. What is EDTA?
Ethylene Diamine Tetra Acetic Acid.
Q395. Mild Steel is used in the manufacture of.........?
Car Parts, railway lines, bridges, pipes and axles.
Q396. What happens when steam is passed over coke?
Water Gas is produced. CuSO4 + Ca(OH)2 .
Q397. What metal is found in Haemoglobin?
Iron.
Q398. What is Vermillion?
Red form HgS-
Q399. What is Salt Gas?
Hydrogen Chloride.
Q400. Which steel is used for the manufacture of Surgical instruments and cutleries?
Stainless Steel.
Q401. Which Steel is used for the manufacture of Radio Valves?
Nickel Steel with 46% nickel.
Q402. What is King's Yellow chemically?
AS2S3 + AS2O3 -
Q403. What happens when steam is passed over Calcium Cyanide?
Ammonia is formed. CaCN + 3H2O g CaCO3 + 2NH3.
Q404. Bicycle parts, automobile parts and aeroplane parts are manufactured with?
Nickel Steel containing 2% nickel.
Q405. Scientific instruments are manufactured with........?
Nickel Steel containing 36% nickel.
Q406. What is Mosaic Gold (stannic sulfide)?
SnS2 . A yellow scaly crystalline powder.
Q407. What is the chemical name for Aspirin?
Acetyl Salicyclic Acid.
Q408. What is laughing gas?
Nitrous Oxide.
Q409. Which steel is used in the making of permanent magnets?
Cobalt Steel.
Q410. What happens when water is treated with Calcium Phosphide?
Calcium Hydroxide and Phosphine are produced. Ca3P2 + 6H2O g 3Ca(OH)2 + 2PH3
Q411. What is oil of Vitriol?
Suphuric Acid.
Q412. Silicon is widely used in ................?
Computers.
Q413. Non-metals are good ....................... agents?
Oxidising.
Q414. Ruby is a precious gem containing .........?
Aluminium oxide with impurities of Chromium Compound.
Q415. Sapphire, one of the precious gem stone, contains.........?
Aluminium oxide with impurities of cobalt and titanium compound.
Q416. By which process Zinc blende and Galena are concentrated?
Froth Floatation.
Q417. What is milk of lime?
Calcium Hydroxide.
Q418. What is absolute alcohol?
99% Ethyl Alcohol.
Q419. What reduces the metallic oxides to metals?
Coke.
Q420. By which process volatile metals like Mercury and Zinc are purified?
Distillation.
Q421. By what name the impurities sand and rocky materials found along with the metals are known?
Gangue.
Q422. What is the substance added during the metallurgy process to remove Impurities?
Flux.
Q423. What is Mohr's Salt?
Ferrous Ammonium Sulphate.
Q424. What happens when water is treated with Calcium Hydride?
Calcium Hydroxide and Hydrogen are produced. CaH2 + 2H2O g Ca(OH)2 + 2H2.
Q425. Flux + Gangue is .....................................?
Slag.
Q426. Which flux is added in metallurgy, to remove the acidic impurities?
CaO - Calcium Oxide.
Q427. What is Water Gas?
Mixture of Carbon monoxide and hydrogen.
Q428. Which metal is known as the 'King of Metals"?
Iron.
Q429. "Quenching" is a process of ........?
Heating steel to bright red hot temperature and cooling it instantly.
Q430. Solder contains........?
Equal amount of lead and tin.
Q431. Brass is an alloy of .........?
Copper and Zinc.
Q432. Wood Metal is an alloy containing........?
Bismuth, Lead, Tin and Cadmium.
Q433. Solder is widely used in the ..................................... industry?
News Paper.
Q434. White gold is an alloy of...............?
Gold + Nickel (Ni).
Q435. What reaction the Hydrogen undergoes in the Sun to form Helium and releases huge energy?
Nuclear fusion.
Q436. What is the catalyst used in the hydrogenation of oil to Vanaspathy?
Ni.
Q437. What happens when water is treated with Calcium Nitride?
Calcium Hydroxide and Ammonia are produced. Ca3N2 + 6H2O g 3Ca(OH)2 + 2NH3
Q438. What is Dry Ice?
Solid Carbon Di-oxide.
Q439. Liquid Hydrogen is used as ........?
Fuel.
Q440. The temperature used in the production of Ammonia by Habeis Process is.......?
723 to 773 degreeK.
Q441. The aqueous solution of Ammonia turns red litmus to..............?
Blue.
Q442. Liquid Ammonia is used as a ..............?
Refrigerant in ice making plants.
Q443. Vulcanization is a process of .........?
Heating natural rubber with Sulphur at a determined termperature.
Q444. Who discovered Electrons?
J.J.Thomson of UK. He is also the discoverer of Isotopes.
Q445. What affects mostly the rate of chemical reaction?
Concentration.
Q446. Liquid Hydrogen is used as a ................ fuel?
Rocket.
Q447. Liquid Ammonia is widely used as a ......................?
Refrigerant.
Q448. When the pH value of a solution reduces, it is known as ........?
Weak Base.
Q449. What type of glass is used in the manufacture of injection ampules?
Pyrex glass.
Q450. What happens when water is treated with Calcium Carbide?
Calcium Hydroxide and acetylene are produced.
Q451. Zinc is treated with ....................... to produce Hydrogen in a laboratory?
Dil.HCl.
Q452. Hydrogen gas is neither ................................... nor ............................ in nature?
Acidic, basic.
Q453. What is the percentage of water in concentrated sulphuric acid?
2%.
Q454. What is added to dissolve Alumina in electrolytic tank?
Cryolite.
Q455. Ammonia gas is ....................................in nature?
Basic.
Q456. What is meant by the word 'Halogen'?
Salt producer.
Q457. What is the expansion of Laser?
Light Amplification by Stimulated Emission of Radiation.
Q458. What is the smell of Hydrogen Sulphide?
Rotten Egg.
Q459. Bismuth is an example of..............?
Metalloid.
Q460. What compound is used in dry cell batteries?
Ammonium Chloride.
Q461. Zircomium and Titanium are mostly used in the field of ........?
Atomic Energy System.
Q462. What happens when Potassium Chlorate is heated?
Potassium Chloride and Oxygen is produced. 2KClO3 (heated) g 2KCl + 3O2
Q463. Protein is a compound of........?
Carbon.
Q464. Which element does not have the property of Catenation?
Nitrogen.
Q465. Name the particle that has the highest velocity?
Photon.
Q466. The ability of a chemical element to form a long chain like structure is known as?
Catenation.
Q467. Carbon combining with Carbon is an example of ........?
Catenation.
Q468. The group which is responsible for the characteristic properties of an Organic compound is known as............................?
Functional group.
Q469. What is the functional group of alcohol?
-- OH.
Q470. What is the functional group of aldehydes is........?
--CHO.
Q471. HCHO is the molecular formula of ..............?
Methanal.
Q472. Who discovered "neutrons"?
J.Chadwick.
Q473. 100% pure alcohol is called........?
Absolute alcohol.
Q474. Acidified potassium dichromate oxidizes ethanol to........?
Ethanoic Acid.
Q475. What will be the derived product when ethanol reacts with copper at 573K?
Acetaldehyde.
Q476. What is the product obtained by the action of ammonia with formaldehyde?
Urotropine.
Q477. Hexamethylene Tetramine is used in the treatment of........?
Urinary ailments.
Q478. The dehydrogenation of isopropyl alcohol by heated copper gives.......?
Acetone.
Q479. Acetone is used as a .........?
Solvent and also to clean and dry the precious equipments.
Q480. What is the IUPAC name for Acetone?
Propanone.
Q481. What is the catalyst used in the preparation of formaldehyde?
Molybdenum Oxide.
Q482. Name the property that depends on the number of particles?
Colligative property.
Q483. What happens when lead nitrate is heated?
Lead Monoxide Nitrogen and Oxygen are produced. 2Pb(NO3)2 (heated) g 2PbO + 4NO2 + O2.
Q484. What is the organic compound used in the synthesis of rubber?
Acetone.
Q485. In soap molecule, the short head is made of ..............?
Carboxylate group.
Q486. What is the IUPAC name of diethyl ketone?
Pentan-3-one.
Q487. Which enzyme is used to convert sucrose into glucose and fructose?
Invertase.
Q488. Ethanol can be dried by ........?
Quick lime.
Q489. Which organic compound is used for making electrical switches?
Bakelite.
Q490. Ether is used as an ...........................................?
Anaesthetic.
Q491. Which process is used to prepare ether?
Williamson's synthesis.
Q492. 2-Butanol is an example of........?
Secondary alcohol.
Q493. What is the unit of protective capacity of a hydrophilic solution?
Gold Number.
Q494. What is formed when diethyl ether reacts with water in the presence of Mineral acid?
Ethanol.
Q495. When Diethyl ether reacts with chlorine in the sunlight, it gives ........?
per chloro diethyl ether.
Q496. The petrochemical that is used in the making of soap and ink is.......?
Glycerol.
Q497. What are the main constituents of LPG?
Propane and Butane.
Q498. How do we call the reaction between an alcohol and an acid?
Esterification.
Q499. Chlorofluoro Carabon (CFC) is derived from.......?
Aerosol Propellants.
Q500. What is Pyrolysis?
Burning without oxygen.
Q501. What is the source of Carbon monoxide pollutant?
Burning of Fossil Fuels.
Q502. Hydrocarbon emission from automobiles can cause........?
Lung Cancer.
Q503. What is the term for the saturated hydrocarbons?
Alkane.
Q504. Trinitro toluene is an.........?
Explosive.
Q505. Glucose is an example of........?
non-electrolyte.
Q506. During photosynthesis, solar energy is converted to........?
Chemical energy.
Q507. Sodium Chloride solution is an example of ........?
Electrolyte.
Q508. What happens when hydrochloric acid reacts with Zinc?
Hydrogen is formed along with zinc chloride. Zn + 2HCl g ZnCl2 + H2
Q509. Who was the first scientist to synthesise an organic compound in the laboratory?
Wohler.
Q510. What is the poisonous gas emitted from the automobile exhaust?
CO.
Q511. Marble, Kerosene, and Petrol are ............................................ compound?
Carbon.
Q512. What is the only element present in Graphite and Diamond?
Carbon.
Q513. Graphite is used in nuclear reactions as a ..............?
Moderators.
Q514. Starch and cellose are ........?
A Polysaccharides.
Q515. Which type of carbohydrate is the most abundant on earth?
Cellulose.
Q516. Name a nuclei used to make atom bomb?
Uranium 235.
Q517. What gives the diamonds the different colours?
Presence of metallic oxides.
Q518. The gas that is most essential for combustion is.......?
Oxygen.
Q519. Why the bricks are red in colour?
Presence of iron oxide.
Q520. Which element is present in milk?
Calcium.
Q521. ....................................are pure substances made up of the same type of atoms?
Elements.
Q522. What is the chemical symbol for Potassium?
K.
Q523. Mercury is a .........?
Liquid Metal.
Q524. What gas is produced by Haber's process?
Ammonia.
Q525. Amalgam is made up of metal and .........?
Mercury.
Q526. Hydrogen gas is ...................................?
20 times lighter than air.
Q527. Chromium is used most in which industrial process?
Electroplating.
Q528. Combustion reaction is an example of........?
Oxidation. An exothermic chemical reaction.
Q529. What is the gas obtained during the electrolysis of molten sodium chloride?
Chlorine.
Q530. What is obtained in the reaction between Zinc and dilute sulphuric acid?
Zinc Sulphate hydrogen.
Q531. What happens when sulphuric acid reacts with copper?
Copper Sulphate and Sulphur di oxide are formed. Cu + 2H2SO4 g CuSO4 + SO2 + 2H2O.
Q532. The compounds with the same molecular formula but having different Structural formula are known as........?
Isomers.
Q533. Oxygen can be prepared in the laboratory by heating........?
Potassium Chlorate.
Q534. In the combined state, carbon occurs as ........?
Marble.
Q535. Carbon di-oxide does not support........?
Combustion.
Q536. Burning of Phosphorous is an example of .......................combustion?
Spontaneous.
Q537. What is amphiprotic substance?
Substance which act as an acid and base.
Q538. The lowest temperature at which a substance catches fire and burn is called as........?
Ignition temperature.
Q539. Which element forms large number of hydrides?
Carbon.
Q540. Photosynthesis is an example of ............................reaction?
endothermic.
Q541. Charcoal is used in .........?
Gas masks.
Q542. Silicon Carbide is also known as ........?
Carborundum.
Q543. In a battery .......................energy changes to ....................................energy?
Chemical, electrical.
Q544. Hydrogen-Oxygen fuel cell is commonly used in.........?
Spacecrafts.
Q545. What happens when nitrogen is passed over heated magnesium?
Magnesium Nitride is formed. 3Mg + N2 g Mg3N2.
Q546. Element ....................................is the major constituent of proteins?
Nitrogen.
Q547. What is the method used for conversion of sea water into potable water?
Osmosis.
Q548. Plastic is a ........................................... of electricity?
Bad conductor.
Q549. Nitrogen oxide added with 10% oxygen can be used as an........?
Anaesthetic.
Q550. .............................is the percentage of free nitrogen present in the atmosphere?
78%.
Q551. The number of protons in the nucleus is indicated by........?
Atomic Number.
Q552. The number of groups in the long form of the periodic table is.........?
18
Q553. Give an example of inert gas.......?
Xenon. (or any of the other inert gases).
Q554. The value of 1 atmosphere is .........?
760 mm of Hg.
Q555. .......................exhibits ionic bond?
Magnesium Chloride.
Q556. What is nascent hydrogen?
Atomic hydrogen liberated in a chemical reaction.
Q557. What happens when pieces of zinc are boiled with Caustic Potash?
Zinc will dissolve and hydrogen is formed along with potassium zincate. Zn + 2KOH g K2ZnO2 + H2
Q558. What is IUPAC related to Chemistry?
International Union of Pure and Applied Chemistry - established in 1921 - HQ: Zurich, Switzerland - is the apex body which lays down the nomenclature for naming of organic and inorganic compounds. The set of rules framed by it are available in Red and Blue Book.
Q559. What is the ideal gas mathematical equation?
PV = nRT.
Q560. The fundamental property of an element is........?
Atomic Number.
Q561. What is the first element in the periodic table?
Hydrogen.
Q562. Among the halogens which one is most reactive?
Fluorine.
Q563. Methane gas is an example of ........?
Covalent compound.
Q564. What is the maximum density of water?
1g/cc.
Q565. The gas used in the advertisement sign boards is........?
Neon.
Q566. What is the method used to refine petroleum?
Fractional distillation.
Q567. What is the most abundant of the noble gases in the earth's atmosphere?
Argon.
Q568. .............................. is the term for the reation that takes place between methane and Chlorine in diffused light?
Substitution.
Q569. The bleaching action of moist chlorine is.............................. in nature?
Permanent.
Q570. Noble gases are also known as .........?
Rare gases.
Q571. Refractories are ......................materials with high melting point?
Heat Resistant.
Q572. Give an example of high melting solid.......?
Sodium Chloride.
Q573. At what temperature water has maximum density?
4 degreeC.
Q574. What is heavy hydrogen known as........?
Deuterium.
Q575. Give an example for heterocyclic compound?
Furan.
Q576. Alkaline Potassium Permanganate is also known as........?
Baeyer's Reagent.
Q577. .......................is the number of neutrons present in the Deuterium?
1 (one).
Q578. Ethers and ............................. are functional isomers?
Alcohols
Q579. Westron is .........?
Acetylene tetrachloride.
Q580. The shape of Methane is.........?
Tetrahedral.
Q581. The chemical reation that takes place in Daniel Cell is........?
Redox Reaction.
Q582. The petroleum product used in dry cleaning is........?
Naphtha.
Q583. Of the coal varieties, which one is considered as of Superior Quality?
Anthracite.
Q584. What is the reaction that takes place at anode during electrolysis?
Oxidation.
Q585. What is the chemical symbol for heavy water?
D2O.
Q586. In electrolytic conductors, the conductivity takes place due to........?
The movement of ions.
Q587. In metallic conductors, the conducting is due to........?
The movement of electrons.
Q588. Acidified Water is a/an...................................conductor?
electrolytic.
Q589. What kind of reaction take place at the cathode during electrolysis?
Reduction.
Q590. Metallic conductors are also known as........?
Electronic Conductors.
Q591. What is Calgon?
Sodium hexa meta phosphate.
Q592. Freezing mixture contains........?
Ice + NaCl
Q593. Blood is a .........?
Homogenous mixture.
Q594. Carbolic acid (phenol) is a.........?
Disinfectant.
Q595. The value of absolute zero temperature is.......................?
273 degreeC
Q596. Which of the halogens reacts with hydrogen even in dark?
Fluorine.
Q597. Covalent bonds are............................?
Directional.
Q598. The cause of non-reactivity of rare gases is due to their ...............?
Octet Configuration.
Q599. What happens when Sulphuric Acid is added to Borium Chloride?
Hydrochloric Acid and Barium Sulphate are formed. B3Cl2 + H2SO4 g BaSO4 + 2HCl
Q600. What is Euchloride?
Gaseous mixture of Cl2 and ClO2
Q601. What is the gas obtained from radioactive disintegration?
Radon.
Q602. What is the chemical term for Salt Producers?
Halogen.
Q603. NaCl is an example of.........?
ionic compound.
Q604. ....................................exhibits ionic bond?
Magnesium Chloride.
Q605. Which test is the confirmatory test for chlorides?
Brown Ring.
Q606. Who gave us the description of the concept of electrolyte in water ?
Arrhenius.
Q607. When Ethylene undergoes polymerization...............?
Polythene is formed.
Q608. The solid member of the halogen family is..............?
Iodine.
Q609. What is Feron?
Refrigerant. CCl2F2
Q610. What happens when mixture of ammonium sulphate and sodium nitrate is heated?
Ammonium Nitrate is formed which on decomposition gives nitrous oxide. (NH4)2SO4 + 2NaSO3 g 2NH4NO3 + Na2SO4 NH4NO3 g 2H2O + N2O.
Q611. Sodium Chloride overgrowing in alcohol is termed as.......?
Suspension.
Q612. Sodium Chloride in water forms a ............................?
True Solution.
Q613. Argon added with 26% of ..............................is used in filling electric lamps?
Nitrogen.
Q614. Hydrogen in palladium is an example of..............................?
Gas in solid.
Q615. The electronegative character is the least in.....................................?
Iodine.
Q616. What is BHC?
Benzene Hexa Chloride - insecticide.
Q617. Extraction of rare gases from liquid air is a process called.........?
Fractional distillation.
Q618. Sodium Chloride in Alcohol forms a ..........................................?
Colloidal solution.
Q619. The important characteristic property of an inorganic compound is........?
Fast reaction.
Q620. Isobutane is an example of..............................compound?
aliphatic.
Q621. What is the chemical formula of Bleaching Powder?
CaOCl2 .
Q622. Expand DDT?
Dichloro Diphynyl Trichloroethane - insecticide.
Q623. The chemical reactions that take place in a primary cell are .........?
irreversible.
Q624. The formation of compounds is generally an.................................................reaction?
exothermic.
Q625. ........................................... is used for making gaskets?
Teflon.
Q626. The notable characteristic property of detergents is .........?
They are more toxic.
Q627. The chemical reactions that take place in secondary cell are..............?
Reversible.
Q628. What is the chemical name for Clay?
Aluminium Silicate.
Q629. Which fuel is used in spirit lamps?
Ethyl Alcohol.
Q630. What happens when Ammonia reacts with Chlorine?
1. If ammonia in excess, ammonium chloride and nitrogen are formed. 8NH3 + 3Cl2 g N2 + 6NH4Cl. 2. If ammonia is less than chlorine, explosive nitronge trichloride is formed. 2NH3 + 6Cl2 g 2NCl3 + 6HCl
Q631. Decomposition reactions are generally.................................................reactions?
endothermic.
Q632. Acetylene is ..................................................in nature?
acidic.
Q633. Hydrogen upon burning produces.............................?
Water.
Q634. When gold dissolves in aqua regia it gives...................................?
soluble auric chloride.
Q635. Ammonia is considered as a very good ............................agent?
reducing.
Q636. Fullerene is one of the recently discovered form of .......................?
Carbon.
Q637. ..............................is used as a reducing agent in iron and steel industry?
Coke.
Q638. What is the purest form of Carbon?
Sugar Charcoal.
Q639. Diamond is not a good conductor of ..................................................?
electricity.
Q640. What is the principal constituent of dead and decayed matter?
Carbon.
Q641. Nitre is.....................................?
Potassium nitrate.
Q642. What happens when a mixture of slaked lime and ammonium chloride is heated?
Ammonia gas is formed along with Calcium Chloride. Ca(OH)2 + 2NH4Cl g 2NH3 + 2H2O + CaCl2.
Q643. Nitrochalk is the name for ...........................................?
Ammonium Silicate + Calcium Carbonate.
Q644. The principal characteristic property of Diamond is.........?
Hardest natural substance.
Q645. In the free state carbon occurs as ...................................?
Diamond.
Q646. Nitric acid acts as an/a ............................................agent?
oxidizing.
Q647. Sodium is isolated from fused sodium chloride by a process called?
electrolysis.
Q648. The content of Soda acid type of fire extinguisher is.........?
Baking Soda.
Q649. Aluminium, Sodium and Fluorine are isolated by the process of........?
Electrolysis.
Q650. Who gave the name hydrogen (meaning "water producer")?
Lavoisier.
Q651. A binary compound of oxygen with another element is called an/a........?
Oxide.
Q652. The electrode connected to the positive terminal of the battery is called........?
Anode.
Q653. The process of union of two or more molecules of a substance to form a Large single molecule is called .....................................?
Polymerisation.
Q654. What will be the colour of the flame when hydrogen burns in air?
Pale Blue.
Q655. Sodium is manufactured from fused sodium chloride by a process called?
Down's Process.
Q656. The process of bleaching by chlorine is called.......?
Oxidation.
Q657. A good fuel should have ..........................................?
a high calorific value and low ignition temperature.
Q658. When steam is passed over red hot coke in the presence of chromium oxide it produces.........?
Water gas.
Q659. The electrolyte used in copper plating process is.........?
copper sulphate.
Q660. Sodium aluminium silicate is called ..............................?
permutit.
Q661. The combustible material on the tip of a safety match stick is................?
Antimony Sulphide.
Q662. What happens when calcium Bicarbonate is heated?
Calcium Carbonate, water and carbon di oxide are produced. Ca(HCO3)2 g CaCO3 + 2H2O + CO2 .
Q663. In electro refining, the pure metal is deposited over the ............................?
Cathode.
Q664. Bases turn phenolphthalein from colourless to..............
pink.
Q665. Chemical decomposition of a substance by water is called........?
Hydrolysis.
Q666. When an electric bulb glows a ....................................change occurs?
physical.
Q667. Which alloy is used in the making of clocks and watches?
Invar.
Q668. What change occurs when wood burns?
chemical change.
Q669. Metalloids are otherwise known as.....................?
semi metals.
Q670. The chemical substance that gets dissociated into ions in a solution is known as?
an electrolyte.
Q671. Electrons were named by.........?
Stoney.
Q672. Smoking cannabis is known to increase levels of a brain chemical called?
Dopamine.
Q673. The orbit nearest to the nucleus of an atom is.....................?
K.
Q674. The most important source of helium is................?
natural gas.
Q675. A true solution contains ...................................
free ions.
Q676. The substance added to get blue coloured glass is.........?
CoO.
Q677. What happens when Ammonia and Air are passed over hot platinum?
Nitric Acid and water is produced. 4NH3 + 5O2 g 4NO + 6H2O
Q678. Iodine does not displace any other ...........................................?
halogen.
Q679. Plants absorb nitrogen in the form of.......................?
soluble compounds of nitrogen.
Q680. If boiling sulphur is poured into cold water, we get .....................................?
plastic sulphur.
Q681. Rusting of iron is an example of.........?
Oxidation.
Q682. The phenomenon of redirection of heat energy towards the earth is called..?
Green House Effect.
Q683. Deutorium is an isotope of...............?
hydrogen.
Q684. What happens when Potassium Chlorate is heated?
Potassium chloride and oxygen are produced. 2KClO3 g KCl + 3O2
Q685. Bordeaux mixture is used as......................?
Fungicide.
Q686. The source of plastic is.............................?
Oil.
Q687. ..........................................is the essential constituent of oils and fats?
Hydrogen.
Q688. Who made the first attempt to explain the structure of the hydrogen atom?
Niels Bohr.
Q689. The pH value of pure water is.........?
Seven.
Q690. Soda glass is called.............................?
Soft glass.
Q691. The process of purifying Germanium is called as ...................................method?
Zone refining.
Q692. What happens when lime water is kept in air?
Turns milky due to carbon di oxide in air.
Q693. Which is the most reactive hydrogen atom in alkanes?
Tertiary.
Q694. A cation is formed by the..............................?
loss of electrons.
Q695. The allotrope of carbon that conducts heat and electricity is................ .
graphite.
Q696. As the atomic number increases electron affinity........ .
Decreases.
Q697. The purest form of iron is........ .
Wrought iron.
Q698. What is the term for the science of potteries?
Ceramics.
Q699. The colour of methyl organe in alkaline medium is ...................... .
Yellow.
Q700. A strong electrolyte in water..............
ionizes completely.
Q701. ............................steel is used in the making of watch springs and razor blades?
Tempered.
Q702. The equivalent weight of an acid depends on its.........?
basicity.
Q703. In an endothermic reaction ............................ is absorbed.
heat
Q704. When an electron is present in a stationary orbit, it neither ....................... nor ............................energy.
absorbs, emits.
Q705. What is white vitriol?
Zinc sulphate.
Q706. What happens when blue litmus is put into a solution of acid?
It turns red.
Q707. In reduction reaction, there is ............... In the oxidation number.
decrease.
Q708. Ionic bonds are .................................... .
non directional.
Q709. The article to be electroplated is made as the ................................... .
Cathode.
Q710. In an atom no two electrons have the same set of four quantum numbers, is known as.............. .
Pauli Exclusion Principle.
Q711. Oxidation number of hydrogen in LiH is........
-1
Q712. If the electron is present in 1s orbital what are the values of n and l?
1, 0.
Q713. Name the element in solid state having the lowest density?
Lithium.
Q714. A substance which accepts one or more electrons from the other is known as..
oxdising agent.
Q715. What are the factors affecting the rate of reaction?
Concentration, Temperature and Catalyst.
Q716. Hall's Process is used for purifying...................... .
Bauxite ore.
Q717. Copper pyrites are concentrated by ....................................
Froth floatation process.
Q718. Which is the artificial fibre?
Rayon.
Q719. What is the chemical name for Gypsum?
Calcium Sulphate.
Q720. Pipes, stoves, and hot water radiators are manufactured with........
Pig Iron.
Q721. Helmets are made from............................
Manganese Steel.
Q722. ...................................does not affect the rate of the reaction.
Pressure.
Q723. ...................................is used in the making of high speed tools.
Chrome Vanadium.
Q724. ..............................is used as an antiseptic in the production of skin ointments.
Sulphur.
Q725. The filling up of orbitals by electrons takes place according to...............
increasing order of energy level.
Q726. What happens when red litmus is put into a solution of base alkali?
Turns blue.
Q727. Ammonium hydroxide is a ......................
weak alkali.
Q728. .....................phosphorous does not react with caustic soda.
Red.
Q729. Rusting of iron is a ...................... reaction.
slow.
Q730. Acetylene is a .............................. compound.
covalent.
Q731. Burning of petrol is an ...................................reaction.
exothermic.
Q732. All combustions reactions are ................................... .
exothermic.
Q733. Which instrument is used to measure radioactivity?
Geiger Muller Counter. GM counter.
Q734. Why is phosphorous kept in water?
Because in air it catches fire and in water it is insoluble.
Q735. Which substance is known as "super cooled liquid"?
Glass.
Q736. Why sugar gets charred while heating?
When it is heated above 200 degreeC, it decomposes into carbon and water and therefore it gets charred.
Q737. Sodium carbonate, calcium carbonate and silica make up the raw materials for?
Glass manufacturing.
Q738. ............................glass is used in the manufacture of ovenware and injection ampules?
Pyrex glass.
Q739. Chromic oxide gives ..............................colour to glass.
Green.
Q740. The lightest element in the periodic table is.......
Hydrogen.
Q741. The acid present in the grapes is........
Tartaric acid.
Q742. Mixturte of 3 parts of concentrated hydrochloric acid and 1 part of concentrated Nitric acid is known as .........
Aqua Regia.
Q743. Cement was discovered by........
Joseph Aspdin.
Q744. Presence of ............................................and ................................... makes water hard by nature.
Calcium and Magnesium salt.
Q745. Conversion of solid to gaseous state without melting it is known as........
Sublimation.
Q746. When water solidifies to ice, heat is.............................
liberated.
Q747. The melting point of ice ..........................................when an impurity is added to it.
decreases.
Q748. When ............................is added to ice, its freezing point decreases.
salt.
Q749. pH of 0.1m NaOH would be........
13
Q750. ..........................................acts as a catalyst in the preparation of oxygen in the laboratory.
Manganese dioxide.
Q751. The reactions in which the reactants absorb light are called........
photochemical reactions.
Q752. Arrhenius concept of an acid is the one that gives......................
hydrogen ion in solution.
Q753. Acid has a ..............taste.
sour.
Q754. Which acid is used for writing and drawing on glasses?
Hydroflouric Acid.
Q755. Base has a .......................taste.
bitter.
Q756. ..............................is the substance which turns blue litmus to red.
Acid.
Q757. ............................is the substance which turns red litmus to blue.
Base.
Q758. Bleaching powder is produced by passing chlorine through......................
dry slaked lime.
Q759. The setting of plaster of paris takes place due to..............................
hydration.
Q760. ....................................is used both in the medical field and also for making toys.
Plaster of Paris.
Q761. Why does the mass of an iron rod increase upon rusting?
Because rust is hydrated ferric oxide (2FeO3, 3H2O) which adds up to the mass.
Q762. .......................acts as an antacid.
Baking Soda.
Q763. ..............................soda is used in the fire extinguishers.
Washing.
Q764. The chemical name of bleaching powder is.........
Calcium oxychloride.
Q765. ............................Steel is used in the making of surgical instruments.
Stainless.
Q766. ..............................steel is used in the making of drilling tools.
Tungsten.
Q767. ..............................steel is used in the making of electromagnet.
Silicon.
Q768. Sodium Carbonate and Sodium bi carbonate, both refers to.......
Baking powder.
Q769. .....................steel is used in the making of airplane parts.
Nickel.
Q770. Chemical name for vinegar is........
Ethanoic acid.
Q771. The pH value of gastric juice is.........
1 to 3.0
Q772. What is the acid present in apples?
malic acid.
Q773. Which compound is used as smelling salt?
Ammonium Carbonate.
Q774. Tamarind contains..............................acid.
Tartaric acid.
Q775. The pH value of soft drinks is.......................
less than 7
Q776. Public Sector Stainless Steel plant is located at ...........................................,Tamilnadu.
Salem.
Q777. The compound that has a strong scent of chlorine is........
bleaching powder.
Q778. Bromine remains ....................... state at room temperature.
liquid.
Q779. Why is salt mixed with ice when making ice cream?
Salt causes reduction of temperature and helps to freeze the ice cream and Freezing temperature is lowered from 0 degree to -5 degreeC.
Q780. .............................iron is used in the making of electromagnets.
Wrought.
Q781. ...................................iron is used in the making of anchors.
Wrought.
Q782. The percentage of gold in 18 carat gold is........
75%.
Q783. What is the catalyst used in the hydrogenation of oil to vanaspati?
Finely divided Ni.
Q784. What is dry ice?
Solid CO2 . Solid Carbon Dioxide.
Q785. The nature of sulphur dioxide is................
Acidic.
Q786. Sulphur is also used as a ..............
Fungicide.
Q787. Which compound is known as tear gas?
Benzenyl chloride.
Q788. What is "darvan"?
Artificial fibre like hair
Q789. Why does milk turn sour?
The microbes react with milk and grow. They turn lactose into lactic acid which is sour in taste.
Q790. .......................method is used in refining aluminium.
Hope.
Q791. The process of electroplating of iron with zinc is known as.............................
Galvanizing.
Q792. Sal Ammoniac is.....................
Ammonium Chloride.
Q793. ............................method is used in large scale manufacturing of sulphur.
Frashc.
Q794. .....................................acid performs the dehydration of flesh.
Sulphuric.
Q795. Liquid Hydrogen is used as a .......................
fuel.
Q796. Duralumin is used in the manufacture of .............................parts.
aircraft.
Q797. .............................alloy is used in the making of scientific instruments.
Magnalium.
Q798. The special feature of non metal is............................
allotropy.
Q799. Sodium is a very ..........................................metal.
Reactive.
Q800. ..........................................and ........................................... are liquids at room temperature.
Bromine and Mercury.
Q801. The process of setting of plaster of paris is retarded by adding..............
Alum and Borax.
Q802. Bromine is a .....................non metal.
liquid.
Q803. Water Soluble bases are known as..............................
Alkalies.
Q804. The basicity of acetic acid is.......................
1
Q805. Calcium Oxide is commonly known as........
Quick lime.
Q806. The postulates of first atomic theory were given by.......................
Dalton.
Q807. Neutrons were discovered by.....................................
Chadwick.
Q808. Protons were discovered by.............................
Goldstein.
Q809. Who discovered the electrons in an atom?
J J Thomson.
Q810. Nucleus was discovered by........
Rutherford.
Q811. Diamond is a good example of.......................
Crystalline carbon.
Q812. The arrangement of carbon in diamond is.....................................
tetrahedral.
Q813. Diamond can be cut by using.........
Diamond.
Q814. Lamp Black is widely used in the manufacture of......................
Printing inks.
Q815. ................................... is used as a moderator in nuclear moderators.
Graphite.
Q816. ....................................is used to decolourise sugar.
Animal Charcoal.
Q817. Sodium salt of fatty acids are known as..........................................
Soaps.
Q818. Carbon atoms in the graphite are linked by ............................ bonding.
covalent.
Q819. .....................................type of fire extinguisher is used to put out electric fires.
Carbon tetra chloride.
Q820. The total number of protons and neutrons in the nucleus constitutes the ....................................of an atom.
Atomic mass.
Q821. The mixture of copper sulphate and lime water is known as............................
Bordeaux mixture.
Q822. Magnesium belongs to .............................
alkaline earth metals.
Q823. According to modern periodic law, the properties of elements are the Periodic functions their..............................
atomic number.
Q824. The elements of zero groups are called................
inert gases.
Q825. Among the halogens, which one is in the solid state?
Iodine.
Q826. The radioactive isotope of hydrogen is................
Tritium.
Q827. Isotopes of an element have different number of .............................
neutrons.
Q828. Matter is made up of extremely small particles known as..............................
atoms.
Q829. The change of the nucleus in an atom is .....................................
positive.
Q830. The electrons revolve around the ...................................
nucleus.
Q831. Deuterium combines with oxygen to form......................
Heavy water.
Q832. What is the chemical name for dynamite?
Glyceryl Trinitrate.
Q833. What is known as "philosopher's wool"?
Zinc Oxide.
Q834. Red phosphorous is widely used in the .........
match industry.
Q835. An atom as a whole is electrically......................
neutral.
Q836. What is known as heavy water?
Deuterium.
Q837. The substances found at the tip of the match stick is.......
Antimony sulphide, Potassium Sulphide and Phosphorous.
Q838. Phosphorous is generally preserved under.......................
water.
Q839. Phosphorous is present in brain as.....................
Phospho proteins.
Q840. Why does milk curdle?
Lactose (milk sugar) content of milk undergoes fermentation and changes into Lactic acid which on reacting with lactose forms curd.
Q841. .............................phosphorous is used as a rat poison.
White.
Q842. ...................................is the chief source of phosphorous.
Bone ash.
Q843. .......................is used for bleaching of cotton.
chlorine.
Q844. Aqua regia is used not only to dissolve gold but also..................................................
silver and platinum.
Q845. Antomony falls in the groups of.......................
metalloid.
Q846. The chemical process that takes place during efflorescence is............................
dehydration.
Q847. The process of slow and uniform cooling is known as....................................
annealing.
Q848. The anhydrous sodium carbonate is called............................
Soda ash.
Q849. Vinegar is a dilute solution of......................
acetic acid.
Q850. Which substance is known as "Chinese White"?
Zinc oxide.
Q851. ............................steel is used in the manufacture of transformers and electromagnets.
Silicon.
Q852. What is the chemical name for Soda Water?
Carbonic Acid.
Q853. The pH value of a solution is 14. Thus, the solution would be a ......................
Strong base.
Q854. The reaction in which heat energy is liberated is known as ...............reaction.
exothermic.
Q855. When a small piece of sodium is dropped in watter, the reaction that take place is...........................................
exothermic reaction.
Q856. Equal volume of all gases containing the same number of atoms under S.T.P. is called as................
Avagadio hypothesis.
Q857. ...........................................is the colour of methyl orange in acid medium.
Red Orange
Q858. ...................................is the term for the number of replaceable hydrogen atoms present in a molecule of an acid.
Basicity.
Q859. Negatively charged particles present in an atom are ......................
electrons.
Q860. How many electrons can be accommodated in s-orbital?
2
Q861. Who proposed planetary model of an atom?
Rutherford.
Q862. Covalent compounds are soluble in......................
benzene.
Q863. Soda water is a solution of .............................
gas in liquid.
Q864. An anion is formed by the gain of..............................
electrons.
Q865. Aerated water is an example of................
gas in liquid.
Q866. Glucose in water is a ......................solution.
true.
Q867. Radioactive phosphorous is used in the treatment of.............................
blood cancer.
Q868. Important property of sulphuric acid is.....................................
highly hygroscopic.
Q869. The substances which give only OH Ions in water are known as...............
Alkalies.
Q870. White phosphorous is a ......................conductor of electricity.
feeble.
Q871. ............................is used as a catalyst in the manufacturing of sulphuric acid.
platinised asbestos.
Q872. A match head contains....................................phosphorous.
Scarlet.
Q873. Nitrogen does not exhibit .................................................
allotropy.
Q874. ............................is used in the making of cooking vessels and chocolate wrappers and in packaging.
Aluminium.
Q875. Magnetite is an ore of............................
Iron.
Q876. Mercury is an electro..............................element.
positive.
Q877. Thermite is a mixture of .......................
Aluminium powder + Ferric oxide.
Q878. Ammonal is a mixture of Aluminium Powder + ..............
Ammonium Nitrate.
Q879. A reaction which is brought about by supplying electric current is known as.......
electrochemical reaction.
Q880. PV= Constant at constant temperature is called........
Boyle's Law.
Q881. Why does not hard water lather soap profusely?
Hardwater contains sulphates and chlorides of magnesium and calcium which form an insoluble compound with soap. Therefore soap does not lather with Hard water.
Q882. Which liquid known as "super liquid"?
Helium liquid.
Q883. Why does sea water boil at a higher temperature than fresh water?
Sea water contains impurities which raises the boiling point of water.
Q884. One mole of carbon dioxide contains.....................
12g of carbon.
Q885. The atomicity of nitrogen is ........
Two.
Q886. The equivalent weight of a base depends on its .......................
Acidity.
Q887. Acidity of a base is the number of replacable ................................... ...................... .
hydrogen atoms.
Q888. Neils Bohr explained that the electrons revolve around the nucleus only in..
circular orbits.
Q889. When the equivalent weight of a trivalent element is 9 its atomic weight will be.........
27
Q890. Reduction is a chemical reaction involving................
addition of hydrogen.
Q891. Energy is emitted when an electron jumps from ........
N shell to M shell.
Q892. Rujtherford's atomic model does not account for.........
the stability of the atom.
Q893. The number of protons present in the nucleus of an element is equal to its
number of electrons.
Q894. In a covalent bond the atoms are held together by.........
weak vanderwaals forces.
Q895. An atom gaining one or more electron becomes .............................
anion.
Q896. Ionic compounds are .....................
electrolytes.
Q897. An atom losing one or more electrons becomes........
cation.
Q898. Which is the first artificial paint?
Perkin's Mauveince.
Q899. Why is it dangerous to have charcoal fire burning in a closed room?
Because it produces carbon monoxide which is suffocating.
Q900. The degree of dissolution increases with .....................
increase in the dilution of the solution.
Q901. When no more solute can be made to dissolve in a solution, it is called.......
saturated solution.
Q902. Hydrogen chloride is an example of........
covalent compound.
Q903. What is the chemical name of marble?
Calcium Carbonate.
Q904. What is the chemical name of Plaster of Paris?
Calcium Sulphate.
Q905. Why is it dangerous to sleep under trees at night?
Plants respire at night and give out carbon di oxide which reduces the oxygen content of air required for breathing.
Q906. Concentrated sulphuric acid removes water from.....................?
sugar, starch and alcohol.
Q907. Common salt in water is an example of.......................solution.
true.
Q908. Bone ash is rich in .....................................
phosphates.
Q909. When oleum is diluted with water it gives.........
Sulphuric acid.
Q910. The ore which is concentrated by magnetic separation is......................
Tinstone.
Q911. The acid used in car batteries is........
Sulphuric acid.
Q912. Sulphuric acid has great affinity towards..............................
water.
Q913. When sodium sulphate is treated with Barium Chloride solution, the colour Of the precipitate formed is..............
White.
Q914. Gravity separation method is used to concentrate..............
Oxide ore.
Q915. Tin is purified by ............................process.
liquation.
Q916. Alloys are produced mainly to .........
increase harness in metals.
Q917. The shape of s orbital is.......................
spherical.
Q918. If the principal quantum number n is 3, the main shell represented as........
M.
Q919. Which quantum number represents the sub shell?
1
Q920. The main shell L has the principal quantum number as................
2
Q921. The planes at which electron density is zero is known as........
nodal plane.
Q922. ..........................................is called the (n+1) rule.
Aufbau principle.
Q923. Azimuthal quantum number represents the ..............of an electron.
subshell.
Q924. Magnetic quantum number represents .................................................
orientation of an atomic orbital.
Q925. The oxidation number of hydrogen in metallic hydide is.........
1
Q926. The quantum number which gives the maximum number of electrons In a shell is .....................................quantum number.
Principal.
Q927. ............................................always has -1 oxdiation state.
Fluorine.
Q928. Identify the orbitals of an electron with quantum number n= 3, l=0?
3s.
Q929. A divalent element has 65.38 as its atomic mass. Its equivalent mass is........
32.69
Q930. Which element has the maximum density in normal temperature?
Osmium.
Q931. The volume occupied by 1 mole of the compound at STP is.........
molar volume.
Q932. Photosynthesis is a ..........................................reaction.
Photochemical.
Q933. ...................................is the gangue present in the haematite ore.
Calcium silicate.
Q934. Dissolution of sodium carbonate in water is an ...........................................reaction.
exothermic.
Q935. During extraction of iron, the flux used is ..............
limestone.
Q936. The addition of fluorspar in the Hall's electrolytic process of aluminium..............
decreases the melting point of the electrolyte.
Q937. Why does ENO's salt effervesce on addition of water?
It contains tartaric acid and sodium bicarbonate. On additing water carbon Di oxide is produced which when released into water causes effervescence.
Q938. An allotrope of phosphorous which does not exhibit phosphorescence is........
red phosphosphorous.
Q939. What are the main elements found in the sun?
Hydrogen and Helium.
Q940. ...................................steel is used in making rock crushing machinery.
Managanese.
Q941. Law of conservation of mass is applicable to ............................reaction.
chemical.
Q942. ...................................acts as a reducing agent in aluminothermic process.
Aluminium.
Q943. The vapour density of a volatile substance is 14. Its molecular mass would be .........
28
Q944. ..............................essential compound of the bones.
Phosphorous.
Q945. Tritium has atomic number 1 and mass number 3. The number of particles Present in its nucleus is.....................
2
Q946. Wood, Starch and Sugar are charred by concentrated....................................
Sulphuric Acid.
Q947. A bond breaking and bond making process is known as ............................
chemical reaction.
Q948. When baking soda is touched with wet hand, ..............................is felt.
chillness.
Q949. What is the chemical name of moth ball?
Naphthalene.
Q950. When copper sulphate crystal is heated the colour change takes place is.......
blue to white.
Q951. The reaction between ionic compounds are ............................................reactions.
instantaneous.
Q952. The change in the concentration of the reactant or product per unit time is known as......................
rate of the reaction.
Q953. White phosphorous is always kept in........
Water.
Q954. Reaction of silver nitrate with sodium chloride is an ......................reaction.
instantaneous.
Q955. Respiration from our body cells is an .......................reaction.
exothermic.
Q956. What is the acid present in the stomach juices?
hydrochloric acid.
Q957. Formation of nitrogen monoxide is an .............................reaction.
endothermic.
Q958. What colour is obtained when cabbage juice is mixed with tooth paste?
Green.
Q959. Sodium and Potassium are stored in...................................?
Kerosene.
Q960. Which is the metal that burns in water?
Sodium.
Q961. Tooth paste is .......................nature.
basic.
Q962. Rate of chemical reaction generally ..........................................with increase in temperature.
increases.
Q963. Which liquid metal has the maximum density?
Mercury.
Q964. Who discovered Formic Acid?
J. Roy.
Q965. Sodium carbonate is used in the manufacture of............... ............... ............... .
Paper, Soap, Textile.
Q966. Sodium carbonate decahydrate is known as........
washing soda.
Q967. When the pH of a solution is 2, then the solution would be a ..............
strong acid.
Q968. For a reversible reaction at equilibrium.....................
the rate of forward reaction is equal to the rate of reverse reaction.
Q969. .....................................is used in endoscopes?
glass fibres.
Q970. .............................glass has high resistance to heat and shock.
Pyrex.
Q971. The reaction between glass and hydrofluoric acid is called........
etching in glass.
Q972. Optical glasses have .....................................
high refractive index.
Q973. Dilute acetic acid is known as..............
vinegar.
Q974. What is Aqua-Fortis?
Nitric Acid.
Q975. What is the main component of natural gas?
Methane.
Q976. Which element is known as Epsom Salt?
Magnesium Sulphate.
Q977. Which radioactive element is found in Kerala?
Thorium.
Q978. What is the chemical name for salt petre?
Potassium Nitrate.
Q979. What is the percentage of Nitrogen in air?
78% by volume in the atmosphere.
Q980. What is "butter of antimony"?
Antimony trichloride - - SbCl3.
Q981. What is the composition of gun powder?
Potassium Nitrate, Charcoal and Sulphur.
Q982. How is a sulphide ore concentrated?
Froth Floatation.
Q983. What are "Miscelle"?
Aggregated colloids.
Q984. What is "tartar emetic"?
Potassium Antimonyl Tartrate.
Q985. What is "micro cosmic salt"?
Sodium Ammonium Hydrogen Phosphate.
Q986. What is Lunar Caustic?
Silver Nitrate.
Q987. Name the most abundant element in the human body?
Oxygen.
Q988. Name the raw materials used for the manufacture of bakelite?
Phenol and Formaldehyde.
Q989. What is "Amatol"?
80% Trinitro Toulene + 20% Ammonium nitrate. (NH4NO3)
Q990. What is "Fenton's Reagent"?
Hydrogen peroxide solution + iron catalyst -(FeSO4 + H2O2)
Q991. What is "Tollen's Reagent"?
Alkaline Silver Nitrate.
Q992. What is "Prussian Blue"?
Ferric Ferro Cyanide.
Q993. What is "cream of tartar"?
Potassium Hydrogen Tartrate.
Q994. What is "Fehling's Solution"?
Mixture of copper sulphate and sodium potassium tartrate.
Q995. Fehling's solution is used to?
Detect sugar.
Q996. Name a metal and non metal that is liquid at 0 degree C?
Metal - Mercury and Non-metal - Bromine.
Q997. What is Lithopone?
Barium Sulphate + Zinc Sulphate.
Q998. What is "purple of Cassius"?
Colloidal Gold and Stannic Hydroxide.
Q999. What is the chemical name for Iron rust?
Hydrated Ferric Oxide.
Q1000. What is Bayer's Reagent?
Alkaline - KMnO4.
Q1001. Which compound is known as "Magnesia Alba"?
Magnesium Carbonate.
Q1002. Which compound is called "Gun Cotton"?
Cellulose nitrate.
Q1003. Which chemical is known as "Fool's gold'?
Pyrite - - FeS2.
Q1004. Which salt is called "Salts of lemon"?
Potassium Quadrioxalate.
Q1005. Which chemical is called "Mosaic's Gold"?
Crystalline Stannic Sulphide.
Q1006. What is a suspension of lime in water called?
Milk of lime.
Q1007. Who split the Uranium atom and discovered the possibilities of chain reaction?
Otto Hahn.
Q1008. Who is considered as the father of Hydrogen Bomb?
Otto Hahn
Q1009. Who is the father of Periodic Table of Elements?
Dmitri Mendeleev.
Q1010. Who propounded the Atomic Theory?
John Dalton.
Q1011. Who manufactured higher density polythene?
Karl Zeigler who received Nobel Prize for this.
Q1012. Who first created the Chloroform?
Sir James Young Simpson.
Q1013. Who first built the nuclear atomic pile?
Enrico Fermi.
Q1014. Which is the first fully synthetic fibre?
Nylon.
Q1015. Who first devised to measure the charge of an electron?
Robert Millikan.
Q1016. Who first developed the process to manufacture Ammonia on industrial Scale?
Fritz Haber.
Q1017. Which is the first element to be transmitted into another by means of high energy machines - Accelerators?
Lithium.
Q1018. Which is the first molecule discovered in space?
Hydroxide.
Q1019. Who was the first to discover "radio emission" from the Sun?
J.S.Hay.
Q1020. Which instrument is used for determining elements present in a substance?
Spectrograph.
Q1021. Which instrument is used to measure volume changes in chemical reaction between gases?
Endometer.
Q1022. Which instrument is used to determine the density of a liquid?
Hydrometer.
Q1023. What is "Pandermite"?
Hydrogen Calcium Borate.
Q1024. Which instrument is used to measure the purity of milk?
Lactometer.
Q1025. Who first built the electron microscope?
Max Knoll and Ernest Ruska.
Q1026. A mixture of which gases is used in the manufacture of electric bulbs?
Oxygen and Argon.
Q1027. Which elementary particles are in equal mass?
Neutron and Proton.
Q1028. What is used for controlling the chain reaction in a nuclear reactor?
Molecules of high energy.
Q1029. Which particle is emitted by the filament of a vacuum tube?
Electrons.
Q1030. What is used as a electrolyte in chromium plating?
Chromic Acid solution.
Q1031. The Indian scientist who put forward the theory of ionization was?
Meghanath Saha.
Q1032. How energy is produced in the Sun?
Nuclear Fusion.
Q1033. Which is the element without neutron?
Hydrogen.
Q1034. Which gas is used in ice plants?
Ammonia.
Q1035. Which poisonous gas is produced when PVC is burned?
Dioxin.
Q1036. What is "Zero energy'?
The energy that exists in atom is Zero energy.
Q1037. Which is the first man made artificial element?
Neptunium.
Q1038. Who made the first artificial element?
McMillan and Ebelson.
Q1039. Who was the first to prove that atom can be broken?
Rutherford.
Q1040. Which gas is the cause of green house effect?
Carbon di oxide.
Q1041. Who made the first atomic reactor?
Enrico Fermi.
Q1042. What is the energy received from a gram of matter?
9 X 10 to the power of 31 Joule.
Q1043. Which is the moving particle in an atom?
Electron.
Q1044. Which was the first submarine that sailed using nuclear power?
Nantilus.
Q1045. What are the stable atomic particles occurring in an atomic nucleus?
Proton and Neutron.
Q1046. What is the charge of a nucleus in an atom?
Positive.
Q1047. What happens when water is cooled from 4 deg to 0 deg C?
Expands.
Q1048. Who discovered the existence of nucleus in an atom?
Rutherford.
Q1049. What was the first fuel used in the first atomic bomb?
Uranium 235.
Q1050. Which was the fuel used in the bomb that was dropped at Hiroshima?
Plutonium 239
Q1051. Deutorium is the natural isotope of which element?
Hydrogen.
Q1052. Hydrogen bomb is based on which phenomenon?
Nuclear Fusion.
Q1053. Who proved first that there is a medium of ether everywhere in the Universe?
Aristotle.
Q1054. Which is the liquid used in volta cell?
Diluted Sulphuric Acid.
Q1055. Who was that scientist to invent that the gases in the atomosphere absorb heat coming from Sun?
Dr. Raja Ramanna.
Q1056. Which is the isotope that is ued to determine the antiquity of very old objects?
Carbon 14.
Q1057. Which was the first city to be destroyed by nuclear explosion?
Hiroshima.
Q1058. Which material directly attains gaseous state from solid state when heated?
Camphor.
Q1059. Is melting of ice, a chemical change or physical change?
Physical change.
Q1060. Which type gases cannot be changed into liquid form?
Ideal gases.
Q1061. Which is the device used for testing the concentration of sugar in a solution?
Saccharimeter.
Q1062. Which device is used in atomic reactors to increase the velocity of ions?
Cyclotron.
Q1063. Why is there a loud explosion when electric bulb bursts?
Because air rushes suddenly into the vacuum space of the bulb.
Q1064. Chemicals that kills insects, weeds, and disease organisms, ticks, mites, Rats etc., is collectively known as.......?
Pesticides.
Q1065. Which element is common in all acids?
Hydrogen.
Q1066. What is the scientific name for soda water?
Carbonic Acid.
Q1067. A substance which radiates light when heated is called?
Incandescent.
Q1068. Give the chemical name of styrene?
Venyl Benzene.
Q1069. Which chemical is added to muddy water to cleanse it?
Alum.
Q1070. What is inorganic Benzene?
Borazole.
Q1071. What has the smallest atom among halogens?
Fluorine.
Q1072. Name a chemical used in making matching sticks?
Tetra Phosphorous Trisulphide.
Q1073. The chemical name for Caustic Sada is.......?
Sodium Hydroxide.
Q1074. Which acid is widely used in the chemical industry?
Sulphuric Acid.
Q1075. What is the term used for a mixture of two insoluble liquids?
Emulsion.
Q1076. What is the gas used to purify water?
Chlorine.
Q1077. What is the measure of activity of an acid?
pH.
Q1078. Which is the element with greatest number of isotopes?
Xenon.
Q1079. Which artificial fibre is used for making fishing nets?
Nylon.
Q1080. Which chemical is used for preserving fruit juices?
Sodium Benzoate.
Q1081. What is the chemical name for Green Vitriol?
Ferrous sulphate.
Q1082. Which element has no neutrons in its atoms?
Hydrogen.
Q1083. Which gas is used for artificial ripening of fruits?
Acetylene.
Q1084. Which is the first organic substance synthesized in laboratory?
Urea.
Q1085. What is the common name for Hydroxi propionic Acid?
Lactic Acid.
Q1086. What is the raw material for the manufacture of rayon?
Cellulose.
Q1087. What is the natural element with the highest atomic number?
Uranium. 92.
Q1088. The chemical name for the gun powder is........
Potassium Nitrate.
Q1089. Which colour is obtained when starch is treated with Iodine?
Blue.
Q1090. The scientists who synthesized amino acid from inorganic molecules are?
Stanlee Miller and Harold Urey.
Q1091. What is abundant in Gober Gas?
Methane.
Q1092. What is the knocking agent used in Petroleum?
Tetra Ethyl Lead.
Q1093. The different forms of a chemical element is called?
Allotropes.
Q1094. The chemical used in making of photograph is.........?
Silver Bromide.
Q1095. The gas produced by pouring water on calcium carbide is........?
Acetylene.
Q1096. What is the water soluble wax?
Carbowax.
Q1097. Bleaching powder is an oxychloride of........?
Calcium.
Q1098. Litmus is extracted from.......?
Lichen.
Q1099. The colour of Chlorine gas is........
Greenish yellow.
Q1100. The chemical name of Quick lime is........?
Calcium Oxide.
Q1101. What is the Universal solvent?
Water.
Q1102. When and who discovered chlorine?
Sheele 1774.
Q1103. What are the alloys of Mercury called?
Amalgams.
Q1104. The colour obtained when fluorescent tubes are filled with Argon is.......?
Red.
Q1105. What colour is obtained whe fluorescent tubes are filled with helium?
Yellow.
Q1106. Who was responsible for the foundation of chemical industry in India?
Prafulla Chandra Ray - Bengal Chemicals.
Q1107. Which gas turns litmus colourless?
Chlorine.
Q1108. Which kind of glass is used in manufacturing glass?
Soda Glass.
Q1109. The solid residue remaining when coal is carbonized?
Coke.
Q1110. What substance is produced on passing chlorine over slaked lime?
Bleaching Powder.
Q1111. Who discovered Bromine?
Balard.
Q1112. The positively charged particle of an atom is........
Proton.
Q1113. Who introduced the term isotope?
Frederic Soddy.
Q1114. Who isolated the chemical element Barium?
Sir Humphrey Davy.
Q1115. Chemical compound that can neutralize an acid to give a salt?
Bases.
Q1116. Which gas has the smell of rotten eggs?
Hydrogen Sulphide.
Q1117. Which gas is known as "Marsh Gas"?
Methane.
Q1118. What gas is liberated when marble reacts with hydrochloric acid?
Carbon di oxide.
Q1119. Which chemical is added to make the rubber hard?
Sulphur.
Q1120. If the pH value of a solution is 7, it is.........?
Neutral.
Q1121. Radioactivity was discovered by?
Henri Bicquerel.
Q1122. Which chemical compound bomb affects only the living organisms?
Neutron Bomb.
Q1123. Which element has the smallest atom?
Hydrogen.
Q1124. Which is the biggest nuclear research reactor in India?
Dhruv.
Q1125. What is the name of the radioactive isotope of hydrogen?
Tritium.
Q1126. What is the half life period of Carbon 14?
5760 years.
Q1127. Yeast acts on sugar to produce what?
Carbon di-oxide and alcohol.
Q1128. How many electrons are there in the outermost orbit of a halogen?
Seven.
Q1129. What is added to rubber to make it heat and cold resistant?
Carbon Black.
Q1130. What is the Kaolin?
China Clay.
Q1131. What is the simplest amino acid?
Glycine.
Q1132. What gas is used in the preparation of polythene?
Ethylene.
Q1133. What is the chemical name of Glauber's Salt?
Sodium Sulphate.
Q1134. What is the chemical name for Dolomite?
Calcium Magnesium Carbonate.
Q1135. Dissolution of sugar into water is a ........
Physical change.
Q1136. Permanent hardness of water is due to the presence of........
Calcium Sulphate.
Q1137. During a Chloride text white fumes are produced due to the formation of.......?
Ammonium Chloride.
Q1138. Temporary hardness of water is due to the presence of.......?
Calcium Carbonate.
Q1139. Which chemical is used for the preservation of grains?
Sodium Benzoate.
Q1140. Which gas is used in cigarette lighters?
Butane.
Q1141. LPG contains?
Butane and Propane.
Q1142. Burning of candle is a .......
Chemical change.
Q1143. Which gas is used to manufacture chloroform?
Methane.
Q1144. What is the chemical name for bleaching powder?
Calcium hypochlorite.
Q1145. What is the source of Common salt?
Halite.
Q1146. What is inorganic Benzene?
Borazole.
Q1147. Which has the smallest atom among halogens?
Fluorine.
Q1148. Name a chemical used in making matchsticks?
Tetra Phosphorous Trisulphide.
Q1149. The chemical name for Caustic Soda is.........
Sodium Hydroxide.
Q1150. Which acid is widely used in chemical industry?
Sulphuric Acid.
Q1151. What is the term used for the mixture of two insoluble liquids?
Emulsion.
Q1152. Permanent hardness of water due to sulphates of metals can be destroyed by the use of .........
Zeolites.
Q1153. Which gas is used for extinguishing of fire?
Carbon monoxide.
Q1154. Which gas is most toxic?
Carbon monoxide.
Q1155. An element found in all organic compound is........?
Carbon.
Q1156. An element common to all acid is........?
Hydrogen.
Q1157. The most commonly used bleaching agent is........
Carbon di oxide.
Q1158. When zinc reacts with hydrochloric acid, the gas evolved is.......
Hydrogen.
Q1159. Hess law is associated with?
Heat exchange in chemical reaction.
Q1160. What is the phenomenon of algal-bloom formation due to chemicals in Water bodies known as........
Eutrophication.
Q1161. What is a positively charged ion called?
Cation.
Q1162. Who discoved Nitrogen?
Daniel Rutherford.
Q1163. What is the main constituent of coal gas?
Methane.
Q1164. What percentage of alcohol does a rectified spirit contain?
95%
Q1165. Which gas is green in colour?
Chlorine.
Q1166. What is the smallest part of a compound whose properties are the same as That of the compound?
Molecule.
Q1167. What is the main component of house hold bleach?
Sodium Hypochlorite.
Q1168. What is the chemical in nail polish remover that removes the polish?
Acetone.
Q1169. What is the term in chemistry that refers to the property of liquids to mix In all proportions to form a homogenous solution?
Miscibility.
Q1170. What is formed when hydrogen is burnt in oxygen?
Water.
Q1171. What is the oldest method to test materials for acidity (pH) content?
Litmus paper.
Q1172. At what pH range and temperature does the colour changes occur in Litmus papers?
pH range of 4.5 to 8.3 at 25 degreeC.
Q1173. What is the colour of neutral litmus paper?
Purple.
Q1174. Who was the first to use the litmus test?
Arnaldus de Villanova, a Spanish alchemist around 1300 AD.
Q1175. Wherefrom litmus is obtained?
Lichens (plants).
Q1176. At what temperature Nitrogen becomes liquid?
218 degreeC.
Q1177. Why does water mixed with bleaching powder turns milky white?
Bleaching powder contains undissolved slaked lime.
Q1178. What colour does Phenolphthalein turn in basic solutions?
Pink to fuchsia.
Q1179. What is the pH value of pure distilled water?
Seven.
Q1180. What is the composition of Natural Gas?
Ethane, Methane, Propane and hydrocarbons.
Q1181. What is the chemical name for Aqua Fortis?
Nitric Acid.
Q1182. The name of chlorine is derived from?
Greek word for Green.
Q1183. Nickel takes its name from the German word meaning?
Devil's copper.
Q1184. Lutetium gets its name from?
Roman name for the city of Paris.
Q1185. Polonium is named after..?
Madame Curie's husband Pierre Curie.
Q1186. What is the most reactive gas?
Fluorine - it is so reactive that even water will burn on it.
Q1187. Nylon gets its name from ........?
New York and London. Discovered by Wallace Carothers.
Q1188. What is used to identify the presence of starch?
Iodine.
Q1189. Which enzymes are required for fermentation of sugar cane to ethanol?
Zymase and Invertase.
Q1190. How to convert quicklime into slaked lime?
By adding water.
Q1191. What is added to the dough to make the cakes fluffy?
Baking Soda.
Q1192. What is the major source of copper?
Azurite, Chalcocite, Malachite - minerals.
Q1193. Which mineral is the source of Aluminium?
Bauxite.
Q1194. Which mineral is the source of Zinc?
Calamine.
Q1195. Which mineral is the source of Tin?
Cassiterite.
Q1196. What is the major source of Lead?
Cerrusite.
Q1197. Which mineral is the major source of Mercury?
Cinnabar.
Q1198. What is the source of common salt?
Halite.
Q1199. What is the main ore from which lead is extracted?
Galena.
Q1200. What is the main mineral source for Iron?
Haematite.
Q1201. Which mineral is the main source of sulphur?
Pyrite.
Q1202. Which mineral is the main source of Titanium?
Rutile.
Q1203. What is malleability?
Converting a metal into sheets.
Q1204. In which solvent, gold can be dissolved?
Aqua Regia.
Q1205. What is "pitch blend"?
An ore of Uranium.
Q1206. What is the metal named after a Greek Goddess?
Vanadium - after Greek Goddess Vanadis.
Q1207. What is "sugar of lead"?
Lead Acetate.
Q1208. What is "Paris Green'?
Double salt of copper Acetate and Copper Arsenite.
Q1209. What is "Agate"?
Naturally occurring Silica.
Q1210. What is "Carborundum"?
Silicon Carbide.
Q1211. What are "First Group Elements"?
Alkali Metals.
Q1212. What are "Second Group Elements'?
Alkaline Earth Metals.
Q1213. What is the basis for modern classification of elements?
Atomic Number.
Q1214. What is the other name for inner transition of elements?
F Block elements.
Q1215. Name two elements having lowest ionization energy?
Caesium and Francium.
Q1216. What is the most electromagnetic element?
Fluorine.
Q1217. What kind of elements generally form coloured compounds?
Transition Metals.
Q1218. Name two elements having largest atomic size?
Caesium and Francium.
Q1219. What is "Horn Silver"?
Ore of Silver - AgCl.
Q1220. What is the name for process of extraction of Nickel?
Mond's process.
Q1221. What is Cinnabar?
Ore of Mercury (HgS)
Q1222. Brass is an alloy of.......?
Copper and Zinc.
Q1223. Bronze is an alloy of .......?
Copper and Tin.
Q1224. The most abundant element in earth's crust is.......?
Oxygen.
Q1225. Glass is mostly produced by heating ........?
Lime Stone, Silica and Soda Ash at 1400 degreeC.
Q1226. Solder is an alloy of.......?
Tin and Lead.
Q1227. Name a metal that is liquid at 0 deg C?
Mercury.
Q1228. What term expresses the purity of gold?
Carat (=200 milligrams).
Q1229. What is the purest form of gold?
24 Carat.
Q1230. German Silver is an alloy of?
Copper, Nickel and Zinc (Has no silver in it).
Q1231. Which is the hardest metal?
Tungsten.
Q1232. German Silver is used for?
Manufacture of resistance wire.
Q1233. Gunmetal is an alloy of?
Copper, Tin and Zinc.
Q1234. Gunmetal is used for the manufacture of?
Gears, Bearing, Valves.
Q1235. What is the most reactive element?
Fluorine.
Q1236. Alloys of Mercury are known as?
Amalgams.
Q1237. Which element was used by Rutherford in his famous scattering experiments?
Gold.
Q1238. What is the brightest form of Carbon?
Diamond.
Q1239. Which is the rarest metal available on earth?
Rodium.
Q1240. What is Nitinol?
An alloy of Nickel and Titanium.
Q1241. What is 22 carat gold?
22 parts of gold + 2 parts of copper. (91.6% of gold).
Q1242. What is Topaz?
Aluminium Fluoro Silicate - a precious yellow stone.
Q1243. What are lead pencils made up of?
Graphite.
Q1244. Which mineral is called "rock cotton"?
Asbestos.
Q1245. What is Armacdite?
A mineral found on moon, not seen on earth.
Q1246. Sapphire is the impure form of which mineral?
Corrundrum.
Q1247. Ruby is the impure form of which mineral?
Aluminium Oxide.
Q1248. Which is the most malleable of all metals?
Gold.
Q1249. What is "pinchbeck"?
All alloy used for making imitation gold jewellery. It consists of copper and zinc.
Q1250. Tincal is a mineral which has neither Tin nor Calcium. What is it then?
Impure form of Borax.
Q1251. What is Britannia Metal?
An alloy containing Tin, Antimony and Copper.
Q1252. From which ore did Marie Curie isolate Radium?
Pitchblend.
Q1253. Lithium, a metal is derived from?
Lepidolite - a mineral.
Q1254. What process is used for manufacturing Steel?
Bessemer Process - invented by Henry Bessemer.
Q1255. What is "Metallography"?
The study of the constitution of metals.
Q1256. What is "Isomorphism"?
Close similarity in crystalline forms of compounds.
Q1257. What is "Gunmetal"?
Alloy of 9 parts of copper with 1 part of Iron.
Q1258. What is the melting point of Tungsten?
3000 degreeC.
Q1259. Why Tungsten is used in the manufacture of the filament of an electric bulb?
Because it has a very high melting point.
Q1260. Which metals are used in transistors?
Germanium, Silicon, Celinium. Also used in Solar Batteries.
Q1261. Which metal reflects the light rays most?
Aluminium.
Q1262. Which glass darkens in sun light and lightens in darkness?
Photo Chromatic Glass.
Q1263. Which alloy is used to bore rock?
Manganese Steel.
Q1264. What is the metal through which x-ray does not pass?
Lead.
Q1265. Fermium, an element is named after?
Enrico Fermi.
Q1266. Mineral substances crystallizing and developing into patterns resembling the Outline of plants are known as.......?
Pseudofossils.
Q1267. Who invented the Stainless Steel?
Harry Brearely of UK in 1912.
Q1268. Which was the first metal made by man?
Copper.
Q1269. Name the method used for the concentration of chromic ores is?
Gravity Process.
Q1270. Which metal is used in aircrafts?
Titanium.
Q1271. Which is the most commonly found mineral?
Silica.
Q1272. Name an element that can easily form a chain structure?
Carbon.
Q1273. What is used for cutting glasses?
Diamond.
Q1274. What is the term used for the iron obtained from the blast furnace?
Pig Iron.
Q1275. Which is the densest metal?
Osmium.
Q1276. Which element has the smallest atom?
Hydrogen.
Q1277. Which mineral is known as "fool's gold"?
Iron Pyrites.
Q1278. Which alloy is used in joining metals?
Solder.
Q1279. Which metal has the lowest melting point?
Mercury. Liquid at room temperature.
Q1280. Which non-metal has the lowest melting point?
Helium.
Q1281. Which element is formed in the Sun as a result of nuclear fusion?
Helium.
Q1282. Name the electrolyte used for nickel plating?
Nickel Ammonium Sulphate.
Q1283. What is the principal mineral in marble?
Calcite.
Q1284. Which form of Iron contains high percentage of carbon?
Pig Iron.
Q1285. Pentlandite is the chief ore for?
Nickel.
Q1286. Which is the first alloy to be made in the world?
Bronze.
Q1287. Which is the commonly used metal that was once precious than gold?
Aluminium.
Q1288. Which is the bluish white metal used in galvanizing?
Zinc.
Q1289. Which element has the greatest number of isotopes?
Xenon.
Q1290. India is the largest producer of........?
Manganese.
Q1291. Which element imparts corrosion resistance to steel?
Nickel.
Q1292. India uses which element for nuclear explosions?
Plutonium.
Q1293. Which alloy is used for preparing strong magnets?
Alnico - comprising aluminium, nickel and cobalt, besides Iron.
Q1294. The most harmful radioactive element is ........?
Radium.
Q1295. Which is the most ductile metal?
Gold.
Q1296. Which metal is used to control neutron flux in an atomic reactor?
Cadmium
Q1297. Which metal is used to control neutron flux in an atomic reactor?
Cadmium.
Q1298. Which metal is used in the manufacture of bullet proof steel?
Zirconium.
Q1299. Which group of elements are used in making super conductors?
Lanthanides.
Q1300. Which element is refined by electrolysis?
Copper.
Q1301. Which elements have zero valency?
Noble gases.
Q1302. Which element has the density less than water?
Sodium.
Q1303. Which type of coal has the highest carbon content?
Anthracite.
Q1304. Which metal is used to make the shield of a reactor?
Lead.
Q1305. Which metallic element is alloyed with copper to make electric cables?
Cadmium.
Q1306. The metals that cannot be classified either as metal or non-metal are called?
Metalloids.
Q1307. The crystalline allotropes of carbon are.......?
Graphite and Diamond.
Q1308. What is calcinations?
Heating in the absence of air.
Q1309. What is Halogen?
Any of the five very active, non-metallic chemical elements - Fluorine, Bromine, Astatine and Iodine.
Q1310. Which Halogen is most powerful oxidizing agent?
Fluorine.
Q1311. What is the first element in the Periodic Table?
Hydrogen.
Q1312. Which is the most abundant element in the Sun?
Hydrogen.
Q1313. What is the active non-metallic element?
Fluorine.
Q1314. What is sulphide or sulfide?
A compound of Sulphur (sulfur) with another element or radical.
Q1315. What is the common sulphide ore of copper?
Cryolite.
Q1316. Which scale is used to determine the hardness of minerals?
MOH's scale with the highest number at 10.
Q1317. What is the metal present in chlorophyll of plants?
Magnesium.
Q1318. What is the unit of weight of precious stones including gold?
Carat = 200 mg.
Q1319. Which metal compound is used to remove Carbon-di-oxide from the air?
Silver Carbonate.
Q1320. Which metal compound made in transparent conditions is used as a cement for glass?
Silver Chloride.
Q1321. Which silver compound is used as a powerful explosive?
Silver Fulminate.
Q1322. Which silver compound is used for cloud seeding for rains?
Silver Iodide.
Q1323. Which silver compound is an important compound widely used for photo Processing?
Silver Nitrate.
Q1324. Which silver compound is used as a positive electrode (cathode) in watch Batteries?
Silver Oxide.
Q1325. What type of iron has the high carbon content?
Pig Iron with 3.5 to 5% carbon content.
Q1326. Iron Acetate compound is used for .......?
Dyeing of fabrics.
Q1327. Which iron compound is used in Blue Prints(architectural diagrams)?
Iron Ammonium Oxalate.
Q1328. Which iron compound is used in insecticides?
Iron Arsenate.
Q1329. Of the various iron compounds, Iron Chloride is most used in various Fields. What are they?
Water purification, sewage treatment, fabric dyeing, colouring agent of Paints, animal feed, photography, printed circuits and as etching on engravements.
Q1330. Which iron compound is used as a brown pigment in rubber?
Iron Hydroxide. Also used for water purification.
Q1331. Which iron compound is used for leather tanning?
Iron Acetate.
Q1332. Which iron compound is used as a dietary supplement?
Iron Gluconate.
Q1333. Which iron compound is used as a "yellow pigment" for various purposes?
Iron Oxalate and Iron Chromate.
Q1334. What is the use of "iron sulphate" compound?
Water purification, sewage treatment, as a catalyst in ammonia production, as an ingredient in fertilizer and herbicide, as a wood preservative and as an additive in flour to increase iron level.
Q1335. What is the carbon content of Steel?
0.02 to 1.7% - varies for different grades of steel.
Q1336. What is the process by which steel is produced?
Bessemer process.
Q1337. Springs and ropes are made of which steel?
High Carbon Steel.
Q1338. What steel is used to manufacture quality knives, axles and punches?
Ultra High Carbon Steel.
Q1339. What lead compound is used in lead acid batteries?
Lead di-oxide.
Q1340. Which lead compound is used in cosmetics and hair colouring products?
Lead Acetate.
Q1341. Hydrogen Sulphide is a poisonous gas. It is detected through the use of?
Lead Acetate coated paper, as the gas reacts with lead acetate.
Q1342. Which lead compound is highly sensitive and has to be stored in inslulated water containers?
Lead Azide - Highly explosive and toxic crystalline.
Q1343. Which lead compound is an important ingredient for the manufacture of white paint?
Lead Chloride.
Q1344. Which lead compound is used as "Chrome yellow" in making paints?
Lead Chromate.
Q1345. Which lead compound is used in the manufacture of infrared detectors?
Lead Selenide.
Q1346. Which lead compound is used in car batteries?
Lead Sulfate.
Q1347. Betterton Kroll Process and Betts process are related to?
Extraction of lead.
Q1348. An aluminium compound when used with an astringent can shrink or constrict body tissues. What is it?
Aluminium Acetate.
Q1349. Which aluminium compound is used in the manufacture of glass and ceramics?
Aluminium Borate.
Q1350. Which aluminium compound is used in petroleum refining and in the Manufacture of synthetic rubber?
Aluminium Chloride.
Q1351. Which aluminium compound is used in the treatment of "Hyperhidrosis" - Abnormally increased perspiration?
Aluminium chlorohydride.
Q1352. Which aluminium compound is used as a dental cement?
Aluminium Phosphate.
Q1353. Which type of Brass is called the "Princess Metal"?
Alpha Brass (35% Zinc + 65% copper).
Q1354. Which gemstone comes in Torquoise Blue - sea water color?
Aquamarine.
Q1355. Pearl, a gem melts in.......?
Vinegar.
Q1356. What is the metal used in storage batteries?
Lead.
Q1357. Which alloy has the least metal in it?
Invar Steel. Discovered by Charles Edouard Guillaume in 1896. He received Nobel Physics Prize for this discovery in 1920.
Q1358. Which light ray has the capacity to cut metals?
Laser (Light Amplification by Stimulated Emission of Radiation).
Q1359. Which form of Aluminium is used to make coins?
Aluminium Bronze.
Q1360. Properties of elements are determined by.......?
Atomic Number.
Q1361. Which metals are in liquid state at room temperature?
Gallium, Mercury.
Q1362. Which metal is not affected by air and water under normal conditions?
Platinum.
Q1363. Which metal has the unique tendency to readily combine with itself to form Long molecules of atoms linked in long chains?
Carbon.
Q1364. Stainless Steel is an alloy of.......?
Iron, Chromium and Carbon.
Q1365. Chemical name of Quartz is.......?
Sodium Silicate.
Q1366. Elements in the same group have similar........?
Chemical properties.
Q1367. The least reactive elements of the periodic table are.......?
Noble gases.
Q1368. Which element is also called "Brimstone"?
Sulphur.
Q1369. Who gave the law that properties of elements are periodic functions of Their atomic numbers?
Moselely.
Q1370. What is the least element alphabetically?
Zirconium.
Q1371. Which is a pure substance made up of one type of atom?
An element.
Q1372. Which is the first element to be named after a living person?
Seaborgium - named after Nobel Laureate Glen Theodore Seaborg.
Q1373. Which is the most abundant mineral in the Earth's continental crust?
Quartz.
Q1374. What is the color of the semi-precious stone "Lapis Lazuli"?
Blue.
Q1375. What is the name for the alloy of tin with copper and antimony?
Goes Pewter.
Q1376. What form of Mineral is Aquamarine?
Beryl (Beryllium Aluminium Silicate - a very hard crystalline material). Emerald also belong to this category.
Q1377. Which metal was used to build the Statue of Liberty?
Copper.
Q1378. Which essential, a common element, shares its Atomic Number with the fourth natural prime?
Nitrogen (7).
Q1379. At what temperature platinum melts?
1843 degree C.
Q1380. Who invented MOH's scale?
Friedreich Moh, Germany.
Q1381. What mineral is extensively used in the manufacture of paint, glazed tiles, Ceramics, paper, rubber etc.,?
Talc.
Q1382. Which chemical elements are named after Earth and Moon?
Tellerium - Earth. Selenium - Moon.
Q1383. What is the major source of Silicon?
Sand.
Q1384. What colour is liquid and solid oxygen?
Pale Blue.
Q1385. Which is the second most abundant element on earth's crust?
Silicon. ( First is oxygen).
Q1386. After which Italian Savant is the number of particles in mole of a substance Named?
Amedeo Avogadro.
Q1387. Which element has close to one crore known compounds?
Carbon.
Q1388. What is the element named after Alfred Nobel?
Nobelium.
Q1389. Which metal is always present in an amalgam?
Mercury.
Q1390. Which district of India has the largest lime stone reserve?
Chandrapur, Maharashtra.
Q1391. How did Armacolite, a mineral from Moon get its name?
From the name of Armstrong, Aldrin and Collins.
Q1392. What is "Copper Belt"?
A region in Central Africa famous for large copper deposits.
Q1393. Which tribal region of India has 70% of Bauxite reserve?
Kashipur - Odisha.
Q1394. What would increase the calorific value of coal?
A process called Enzyme Wash.
Q1395. Misch Metal is a mix of rare earth metals. Where is it used commonly?
Cigarette Lighter. It is used in the flint ignition device of it.
Q1396. Which gemstone has the highest carat value?
Ruby.
Q1397. What is the composition of Gun metal?
Copper 86% + Tin 9.5% + 2% Zinc and 2.5% lead. This combination will vary in a very small quantity for producing different products.
Q1398. Which element has the largest known compounds?
Carbon - close to 10 million compounds.
Q1399. Helenium, Selenium and Uranium are named after.......?
Helenium - Sun; Selenium - Moon; Uranium - Uranus.
Q1400. After diamond, which is the hardest stone found in nature?
Sapphire.
Q1401. What indicates the presence of copper in a burning material?
Blue Flame.
Q1402. What happens to Alkali Metals when exposed to water?
Explode.
Q1403. Which is the lightest chemical element with no stable isotope?
Technetium.
Q1404. Hafnium gets its name from?
Latin name for Copenhagen (Denmark).
Q1405. Britannium is an alloy of.......?
93% Tin + 5% Antimony + 2% Copper.
Q1406. What is EPNS in the metal world?
Electro Plated Nickel Silver.
Q1407. Platinum melts at .......?
1843 degreeC.
Q1408. Berkelium is named after.......?
Berkeley -A city of US
Q1409. Which metal forms part of Black and White films?
Silver.
Q1410. What is essential for the iron to rust?
Oxygen.
Q1411. Which is the lightest metal?
Lithium.
Q1412. Fire Assay is a test associated with.......?
Gold - to test its purity.
Q1413. Sterling Test is associated with.......?
Silver - to test its purity.
Q1414. Cerium - the element is named after?
The world's largest known asteroid - Ceres.
Q1415. What are the two radioactive elements mostly used in Nuclear Reactors?
Plutonium and Uranium.
Q1416. Which country is the largest producer of copper?
US
Q1417. Which country is the world's leading producer of Mica?
India.
Q1418. Italy is the world's leading producer of.......?
Mercury.
Q1419. Which African country is the leading producer of Uranium?
Zaire.
Q1420. Which country is the world's leading producer of Coal?
US
Q1421. Which country mines most copper in the world?
Chile.
Q1422. Which country has the largest deposits of Uranium?
Uranium.
