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Q1. Deuterium is an isotope of which of the following elements?
Correct answer : 2
Q2. Who revealed that the fundamental units of matter are atoms?
Correct answer : 3
Q3. Which of the following reacts with ozone and decomposes it?
Correct answer : 2
Q4. By which of the following means, oceans get more polluted?
Correct answer : 2
Q5. A car travelling at a steady speed causes ......pollution.
Correct answer : 2
Q6. DDT is a……
Correct answer : 3
Q7. Mixture of smoke and fog is otherwise known as.......
Correct answer : 1
Q8. Which of the following gets more polluted by the excessive use of fertilizers?
Correct answer : 2
Q9. How do we call the phenomenon of redirection of heat energy towards the earth?
Correct answer : 3
Q10. Among the following which is/are the chemical/s released by jet aeroplanes that pollute the atmospheric air?
Correct answer : 3
Q11. Why detergents are better than soap for laundering?
Correct answer : 3
Q12. Soda Iye used in the hot process of the preparation of soap is......
Correct answer : 3
Q13. Petroleum is also known as........
Correct answer : 4
Q14. Iodine displaces……
Correct answer : 4
Q15. Hydrogen sulphid is…..
Correct answer : 3
Q16. Of the following allotropic form of sulphur, which one is the most stable?
Correct answer : 2
Q17. Monoclinic sulphur is otherwise known as…..
Correct answer : 1
Q18. Rhombic sulphur is otherwise known as.......
Correct answer : 2
Q19. Sulphur dioxide is........
Correct answer : 4
Q20. What can be obtained by pouring boiling sulphur into cold water?
Correct answer : 4
Q21. Of the following which one explodes upon heating?
Correct answer : 1
Q22. In which form the plants absorb nitrogen?
Correct answer : 4
Q23. Mark the gaseous element from among the following?
Correct answer : 2
Q24. In which of the following the atomic volume is the high during any period?
Correct answer : 3
Q25. Among the following which one is least metallic?
Correct answer : 1
Q26. Which is the non metal among the following?
Correct answer : 3
Q27. Who among the following named the "Electrons"?
Correct answer : 2
Q28. Which is the orbit nearest to the nucleus of an atom?
Correct answer : 3
Q29. Of the following which one is used for making transparent containers?
Correct answer : 4
Q30. What does "Petroleum" mean?
Correct answer : 1
Q31. What is the content of a true solution?
Correct answer : 1
Q32. How do we call a chemical substance that gets dissociated into ions in a solution?
Correct answer : 3
Q33. Silver nitrate reacts with chloride salt to form .... Percipitate.
Correct answer : 4
Q34. Of the following, which one is the most important source of helium?
Correct answer : 2
Q35. Benzene is a .....
Correct answer : 4
Q36. The temperature of a substance denotes ..... energy of its particles.
Correct answer : 4
Q37. Metalloids are otherwise known as ....
Correct answer : 2
Q38. Atomic radii of the elements increase from ...
Correct answer : 3
Q39. How many electrons is/are present in the valence shell of an alkali metal?
Correct answer : 1
Q40. Electron affinity of halogens is ...
Correct answer : 3
Q41. Excess of what in the atmosphere causes the "Green house effect"?
Correct answer : 1
Q42. A chemical change occurs in which of the following occurrences?
Correct answer : 2
Q43. A physical change occurs in which of the following occurrences?
Correct answer : 1
Q44. What is the term for the process of converting solid into a vapour directly without passing through the liquid state?
Correct answer : 2
Q45. Which of the following alloy is used in making clocks and watches?
Correct answer : 3
Q46. Bases turn phenolphthalein from colourless to which of the following colours?
Correct answer : 2
Q47. What is the boiling point of water?
Correct answer : 4
Q48. In the electro refining process, the pure metal gets deposited over the ....
Correct answer : 2
Q49. What is the electrolyte used in copper plating?
Correct answer : 1
Q50. Of the following gases, which one is a mixture of Carbon monoxide and hydrogen in 1:1 ratio?