1. Which of the following elements is non-radioactive ?

2. The presence of ozone in the stratosphere is responsible for

3. Iodine value is used to estimate

6. Silicone is a polymer of

7. Vulcanized rubber contains sulphur

8. Bleaching action of moist sulphur dioxide is because of its

11. Natural rubber is the polymer of :

12. Which one of the following is used to restore the colour of old oil paintings ?

13. Which of the following elements is obtained from seaweeds ?

14. The aprotic solvent is

15. The polymer obtained by the condensation of hexamethylene diamine and adipic acid is :

16. Hamburger effect is otherwise known as–

17. Which of the following is the main compound of voter ink?

19. Ultra purification of a metal is done by :

20. Haloarenes are more stable than haloalkanes due to

21. The heaviest naturally occurring element is:

22. The degree of dissociation of an electrolyte depends on

23. Which of the following is used in dating archaeological findings ?

24. The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is

25. PVC is obtained by the polymerisation of

26. Inert gases are

27. The unit of ionic product of water (Kw) is :

29. German silver used for making utensils is an alloy of

30. Which one is the most dense liquid from the below?

33. The major use of sulphur is in the manufacture of

35. Ozone layer is present in

36. The substance that is added to make natural rubber strong and more bouncy is

37. A polymeric substance used to make parachute is

41. Which of the following alloy is used in making magnet ?

43. Aluminium chloride is

44. Vulcanization of rubber is carried out by adding

45. The structure of NaCl crystal is

48. Silica gel is a

49. Silicon is a

52. Sulphur dioxide bleaches colouring matter by :

53. The buffer action of blood is due to the presence of

54. Neoprene is prepared by polymerisation of which of the following

55. Brass gets discoloured in air due to constant exposure in presence of:

56. Which of the following partially miscible liquid pairs has both lower and upper critical solution temperature?

57. Peroxyacetyl nitrate is a

58. The coordination number of body centered atom in cubic structure is

59. Silver nitrate solution is kept in brown bottles in laboratory because

60. What is a Bakelite ?

61. What happens when a drop of glycerol is added to crushed KMnO₄ spread on a paper ?

62. What is Zeolite?

65. The noble gas used in radiotherapy is

66. In its reaction with silver nitrate, C₂H₂ shows

68. German silver, an alloy, does not contain the metal

70. The strongest oxidizing agent among the following is:

72. The compounds formed when hydrogen combines with p-block elements are called

73. Which of the following is not a method of preparing oxygen?

74. Silicon is used in

75. Carborundum is another name of

76. “Paramagnetism” is the property of

81. Which of the following has the highest lattice energy?

83. Which of the inert gases can form compounds?

84. Natural rubber is a polymer of

85. German silver is an alloy of

86. The polymer used in making plastic crockery is

87. The polymerisation of which often following is used in manufacturing of polythene in industry ?

89. Which one of the following does not form oxyacid ?

91. The basic chemical building block of natural rubber obtained from trees is

92. Type metal used in printing press is an alloy of

96. Bakelite is a co-polymer of Phenol and

99. Which of the following substance is highly plastic ?