3. Which one is the simplest form of alkane?

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

11. Chloroform can be used as

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

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

14. DDT and BHC may act as

15. Which one is the most reactive halogen?

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

17. The chemical that is used to ripen mangoes is

18. Choose the incorrect statement pertaining to organic compounds

19. The natural source of hydrocarbon is

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

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

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

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

27. Electric fuse is an alloy of

28. Which of the following is used as anesthetic ?

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

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

31. Who developed Hydrogen Bomb?

32. The minimum energy required for an effective collision is

33. The compound to which H₂ does not add is

35. Detergents used for cleaning clothes and utensils contain

36. The next higher homologue of C₆H₁₄ is

37. Saccharin is made up of

40. Ethanol containing 5% water is known as :

41. One of the constituents of tear gas is

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

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

45. The common refrigerant in domestic refrigerator is

46. Aspirin is

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

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

49. Which of the following has no unit?

52. KMnO₄ can be used as

53. Antacid tablets consist of

54. Gypsum is used for improvement of:

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

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

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

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

61. Sulphuric acid is

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

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

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

72. Benzene cannot undergo :

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

76. Synthetic detergents are prepared from

77. Who first published the periodic table?

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

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

80. Which of the following is used for refrigeration?

81. The element used for making solar cells is

82. The gas which emits from rice field is

83. By-product obtained by soap industry is

84. Gunpowder consists of a mixture of

85. Vinegar is an aqueous solution of

86. Ethylene is a ________ molecule.

87. Laughing gas is

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

90. Alum is used as

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

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

93. Detergents are

94. Commercial Vaseline is derived from

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

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

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