1. Which one is the most reactive halogen?

2. For a spontaneous chemical process, the free energy change is

3. This group of alumino-silicate minerals is widely used in making electrical insulators

6. The chemical that is used to ripen mangoes is

7. The metal compound commonly found in Sindhoor or Kumkum is based on

8. Chloroform can be used as

9. Ethanol containing 5% water is known as :

11. By-product obtained by soap industry is

12. Which one is the simplest form of alkane?

14. Who first published the periodic table?

16. When conc. H₂SO₄ is added to dry KNO₃, brown fumes are evolved. These fumes are due to

18. Which of the following is used to remove ink and rust stains on cloth?

19. Which among the following is not a characteristic of transition metals?

20. Aquaregia is a mixture of the following in the ratio 1 : 3 by volume

21. Saccharin is made up of

22. Commonly used antiseptic ‘Dettol’ is a mixture of

24. Benzene cannot undergo :

26. Silver halides are used in photographic plates because they are

29. Detergents are

32. Vinegar is an aqueous solution of

33. Electric fuse is an alloy of

35. Synthetic detergents are prepared from

37. KMnO₄ can be used as

38. Commercial Vaseline is derived from

40. The gas produced in marshy places due to decomposition of vegetation is

42. Commercial nitric acid is coloured because it contains dissolved :

43. The most suitable vessel for storing concentrated sulphuric acid is

44. Aspirin is

45. Which of the following elements is found in all organic compounds?

46. The chemical used for cloud seeding for artificial rains is

47. Ethylene is a ________ molecule.

49. The elements with atomic numbers 9, 17, 35, 53, 85 are all

50. Gypsum is used for improvement of:

51. The common refrigerant in domestic refrigerator is

52. The element used in the manufacture of safety matches is

54. Which of the following is used for refrigeration?

55. The minimum energy required for an effective collision is

56. One of the constituents of tear gas is

57. Alcoholic (– OH) group can be identified by :

59. DDT and BHC may act as

60. Detergents used for cleaning clothes and utensils contain

61. Which one of the following nonmetals shows allotropy in the liquid state?

64. Choose the incorrect statement pertaining to organic compounds

66. Which of the following is not a natural source of hydrocarbon?

68. Wax used for making candle is chemically a mixture of

69. Gunpowder consists of a mixture of

70. The gas used in the artificial ripening of fruits is

72. Adding Cl₂ to benzene in the presence of AlCl₃ is an example of :

73. Who developed Hydrogen Bomb?

74. The compound to which H₂ does not add is

75. Total number of halogen elements found in the periodic table is

76. By which organic compound all the oils are known ?

77. Stains of rust on clothes can be removed by :

78. Antacid tablets consist of

79. The element used for making solar cells is

80. The next higher homologue of C₆H₁₄ is

82. The gas which emits from rice field is

83. Substance used as an anti freeze in radiators of automobiles is :

84. One of the following is used to dissolve noble metals. That is

85. When a bond is formed between two atoms, the energy of the system will

87. The natural source of hydrocarbon is

88. Sulphuric acid is

89. Laughing gas is

92. Which of the following has no unit?

94. The gas used for artificial fruit ripening of green fruit is –

95. Alum is used as

96. Which of the following chemicals is used in photography ?

100. Which of the following is used as anesthetic ?