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Unfortunately, Mr. M. Subramanian, who maintained this website lost his battle to cancer and passed away in July, 2019. The database has over 50,000 questions. If you are interested in purchasing the website/database, please reach out using the form here.
Khub.info Learn TNPSC exam and online pratice
Q1. Which of these gases was first chemically isolated in 1895 by British Chemist William Ramsay?
Q2. Among the following which one is NOT a non-metallic mineral?
Q3. Acetyl CoA is a
Q4. The citric acid cyclic reactions end with the formation of which of the following?
Q5. Conversion of pyruvic acid into acetyl CoA involves………
Q6. Match the following correctly: A) Lignite 1)Copper B)Bauxite 2)Iron C)Magnetite 3)Aluminium D)Pyrite 4)Coal
Q7. Which is the leading sulphur producing country in the world?
Q8. Iron is obtained mostly from ………………
Q9. ………………is the largest Mercury producing country in the world.
Q10. Republic of Congo is one of the leading producers of .......
Q11. Which pair of countries are the leading producers of Mica?
Q12. Which pair of countries are the leading producers of Rock Phosphate?
Q13. .......is the leading producer of Uranium.
Q14. What is the quality of basic slag, a byproduct of steel plants?
Q15. Which state of India is the largest producer of antimony (Sb)?
Q16. Which state is the largest producer of bauxite>
Q17. Which state of India is the largest producer of copper?
Q18. Lead, ingested or inhaled, is a health hard. After the addition of lead to petrol has been banned, what still are the sources of lead poisoning? (1) smelting units (2) pens and pencils (3) Paints (4) Hair oils and cosmetics. Pick the correct answer.
Q19. Aluminium usually occurs in the form of….
Q20. Which state of India is the largest producer of Thorium?
Q21. ………………is the largest producer of Sulphur.
Q22. …………………is the largest producer of Manganese
Q23. ……………….is the largest producer of Lignite
Q24. Manganese is extracted from .........ore
Q25. What is the most abundant element found in sea water?
Q26. Chadwick's discovery was
Q27. Electrons was discovered by……………
Q28. Deuterium oxide is known as ........
Q29. The main gas causing the green house effect is.......
Q30. The gases used in different types of welding would include……………….
Q31. Stainless steel is an alloy of Iron,…………………..
Q32. The concentration of acid in batteries is measured by using………….
Q33. Of the following, which one represents a chemical change?
Q34. "Saccharimeter" is used to determine ………………….
Q35. The instrument used to determine the volume changes in chemical reaction is known as
Q36. The hardest substance available on earth is.......
Q37. The gas used in ana electric bulb is ......
Q38. The acid present in butter milk is……………….
Q39. "Green House" effect is due to .....
Q40. Which oxide of Nitrogen is used as "anaesthetic" in the medical field?
Q41. "Vinegar" is an aqueous solution of ........
Q42. "Heavy Water" is used in ....
Q43. "Bauxite" is an ore of………..
Q44. The element which has more than one form is known as .......
Q45. The substance commonly used as a cooling agent in refrigerators is ......
Q46. Among the following gases, which one is not found in the air?
Q47. Brass is an alloy of
Q48. The lightest substance is ………………
Q49. The metal whose salts are sensitive to light is ........
Q50. Which of the following is a chemical change?