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Q1. Deuterium is an isotope of which of the following elements?
Q2. Who revealed that the fundamental units of matter are atoms?
Q3. Which of the following reacts with ozone and decomposes it?
Q4. By which of the following means, oceans get more polluted?
Q5. A car travelling at a steady speed causes ......pollution.
Q6. DDT is a……
Q7. Mixture of smoke and fog is otherwise known as.......
Q8. Which of the following gets more polluted by the excessive use of fertilizers?
Q9. How do we call the phenomenon of redirection of heat energy towards the earth?
Q10. Among the following which is/are the chemical/s released by jet aeroplanes that pollute the atmospheric air?
Q11. Why detergents are better than soap for laundering?
Q12. Soda Iye used in the hot process of the preparation of soap is......
Q13. Petroleum is also known as........
Q14. Iodine displaces……
Q15. Hydrogen sulphid is…..
Q16. Of the following allotropic form of sulphur, which one is the most stable?
Q17. Monoclinic sulphur is otherwise known as…..
Q18. Rhombic sulphur is otherwise known as.......
Q19. Sulphur dioxide is........
Q20. What can be obtained by pouring boiling sulphur into cold water?
Q21. Of the following which one explodes upon heating?
Q22. In which form the plants absorb nitrogen?
Q23. Mark the gaseous element from among the following?
Q24. In which of the following the atomic volume is the high during any period?
Q25. Among the following which one is least metallic?
Q26. Which is the non metal among the following?
Q27. Who among the following named the "Electrons"?
Q28. Which is the orbit nearest to the nucleus of an atom?
Q29. Of the following which one is used for making transparent containers?
Q30. What does "Petroleum" mean?
Q31. What is the content of a true solution?
Q32. How do we call a chemical substance that gets dissociated into ions in a solution?
Q33. Silver nitrate reacts with chloride salt to form .... Percipitate.
Q34. Of the following, which one is the most important source of helium?
Q35. Benzene is a .....
Q36. The temperature of a substance denotes ..... energy of its particles.
Q37. Metalloids are otherwise known as ....
Q38. Atomic radii of the elements increase from ...
Q39. How many electrons is/are present in the valence shell of an alkali metal?
Q40. Electron affinity of halogens is ...
Q41. Excess of what in the atmosphere causes the "Green house effect"?
Q42. A chemical change occurs in which of the following occurrences?
Q43. A physical change occurs in which of the following occurrences?
Q44. What is the term for the process of converting solid into a vapour directly without passing through the liquid state?
Q45. Which of the following alloy is used in making clocks and watches?
Q46. Bases turn phenolphthalein from colourless to which of the following colours?
Q47. What is the boiling point of water?
Q48. In the electro refining process, the pure metal gets deposited over the ....
Q49. What is the electrolyte used in copper plating?
Q50. Of the following gases, which one is a mixture of Carbon monoxide and hydrogen in 1:1 ratio?
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