Quiznetik

Chemistry | Set 3

1. Gunpowder consits of a mixture of –

Correct : C. nitre, sulphur and charcoal

2. Litmus is obtained from –

Correct : D. lichen

3. Vinegar made by fermentation from cane sugar contains –

Correct : D. acetic acid

4. Which of the following can be used to absorb neutrons to control the chain reaction during nuclear fission?

Correct : A. Boron

5. Bone ash contains -

Correct : C. Calcium phosphate

6. The hardest substance available in earth is –

Correct : C. Diamond

7. potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed?

Correct : A. From brown to blue-black

8. Lead pencil contains –

Correct : D. graphite

9. Solder is an alloy of –

Correct : C. tin, lead

10. What is the most common salt in sea water?

Correct : C. Sodium chloride

11. When quick lime is added to water

Correct : A. heat is liberated

12. The umber of neutrons present in an element having mass number 226 and atomic number 88 is–

Correct : B. 138

13. The atomic number of hydrogen is 1. This implies that it contains                in its K- shell.

Correct : C. One electron

14. Name two elements that find wide application in transistor industry –

Correct : A. Silicon and Germanium

15. The energy of the sun is mainly due to

Correct : D. nuclear fusion

16. Tear gas used by the police to disperse the mob contains -

Correct : B. Chlorine

17. Epsom salt is used -

Correct : A. as purgative

18. The ratio of pure gold in 18 carat gold is -

Correct : C. 75%

19. Oil of vitriol is -

Correct : B. sulfuric acid

20. The number of electrons in the outer shell of the most stable or inert atoms is

Correct : D. 8

21. Supersonic jet causes pollution by thinning of -

Correct : A. O3 layer

22. Photoxidation process is initiated by –

Correct : A. light

23. Ultraviolet radiation striking the earth is due to the depletion of –

Correct : C. ozone

24. In nuclear reactors, graphite is used as a/an –

Correct : C. moderator

25. Sea water can be purified by the process of –

Correct : A. distillation

26. Which is/ are the important raw materials in cement industry?

Correct : D. Limestone and Clay

27. The father of modern chemistry is –

Correct : B. Lavoisier

28. The acid rain destroys vegetations because it contains –

Correct : D. sulphuric acid

29. Diamonds are glittering and attractive because light incident on them undergoes –

Correct : B. multiple internal reflections

30. Which of the following is a supercooled liquid?

Correct : C. Glass

31. On heating, Gypsum loses certain percentage of its water content and becomes

Correct : C. Plaster of Paris

32. What is the element required for solar energy conversion?

Correct : C. Silicon

33. What is the chemical name for `Baking Soda'?

Correct : B. Sodium bicarbonate

34. The first metal used by a man was –

Correct : A. Copper

35. Which of the following is used to remove rust stains on cloth?

Correct : C. Oxalic acid solution

36. The substance most commonly used as a food preservative is –

Correct : D. sodium salt of benzoic acid

37. What among following is used to produce artificial rain?

Correct : C. silver iodide

38. Detergents clean surfaces on the principle of –

Correct : B. surface tension

39. Which of the following is ozone depleting pesticide?

Correct : C. Methyl bromide

40. Galvanised iron is made by coating iron with –

Correct : A. Zinc

41. An atomic pile is used for –

Correct : B. conducting nuclear fission

42. Which of the following type of coal has the lowest proportion of volatile matter?

Correct : D. Anthracite

43. The compound to which H2 does not add is –

Correct : B. Tetraphenyl ethylene

44. Major gaseous pollutant of the thermal power station is –

Correct : D. SO2

45. The process of removing calcium and magnesium from hard water is known as –

Correct : D. Water softening

46. Which of the following metals causes Itai-Itai disease?

Correct : A. Cadmium

47. Which is used in preparation of dynamite?

Correct : A. glycerol

48. Vinegar is the trade name of -

Correct : A. acetic acid

49. Acid secretion is characteristic of -

Correct : B. Stomach

50. Which one of the following is not a fertilizer?

Correct : B. Calcium sulphate

51. The common refrigerant in domestic refrigerator is -

Correct : D. Freon

52. The chemical name of “laughing gas” is -

Correct : D. Nitrous oxide

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

Correct : A. Oxalic acid

54. Bleaching action of chlorine is by -

Correct : D. oxidation

55. Hardest material is -

Correct : B. Diamond

56. When iron rusts, its weight -

Correct : B. increases

57. Two elements which can form a large number of compounds are

Correct : A. Carbon and Hydrogen

58. An inert gas mixed with oxygen given to patients suffering from restricted breathing is –

Correct : A. Helium

59. Brass is an alloy of -

Correct : B. Zine and copper

60. The chemical name of rat poison is -

Correct : D. zinc phosphide

61. Slag is a name given for -

Correct : C. molten alumina

62. Which one of the following statements is not correct? Vulcanisation of rubber makes it -

Correct : A. soft and flexible

63. Stainless steel is an alloy of -

Correct : B. chromium, carbon and iron

64. For generation of biogas, the materials commonly used are —

Correct : A. Animal wastes

65. Which one of the following minerals is found in Monazite sand?

Correct : C. Thorium

66. Now-a-days yellow lamps are frequently used as street lights. Which of the following gases is used in these lamps?

Correct : A. Sodium

67. The tip of the match-stick contains –

Correct : C. red phosphorus

68. Commercially, sodium bicarbonate is known as –

Correct : B. Baking soda

69. Which gas does not form the part, of atmosphere?

Correct : C. Chlorine

70. The reaction between an acid and a base to give a salt and water is known as a -

Correct : A. Neutralisation reaction

71. Which of the following elements is obtained from sea weeds?

Correct : D. Iodine

72. Which of the following gases is most toxic?

Correct : B. Carbon monoxide

73. Electron affinity of noble gases is -

Correct : A. zero

74. Curd is sour due to presence of –

Correct : B. Lactic acid

75. Tear gas is –

Correct : B. Carbonyl chloride

76. Saccharin is made up of –

Correct : A. Toluene

77. PVC is obtained by the polymerisation of –

Correct : B. Vinyl chloride

78. Which of the following gases is present under pressure in soft drinks?

Correct : C. Carbon dioxide

79. The substance which does not expand on going from liquid state to solid state is –

Correct : D. Type metal

80. Isobars are lines joining places having equal –

Correct : B. Pressure

81. Global warming is mainly due to accumulation of –

Correct : C. Carbon dioxide

82. Which is abundant in Gobar gas?

Correct : B. Methane

83. The most suitable vessel for storing concentrated sulphuric acid is –

Correct : C. Glass vessel

84. The radioactive element used in heart pacemakers is –

Correct : A. Uranium

85. The element which is commonly used in nuclear for producing electricity by nuclear fission is –

Correct : C. Uranium

86. Which amidst the following is not a gem stone?

Correct : A. Cat's-eye

87. Which of the following vegetable oils does not contain essential fatty acids?

Correct : A. Sunflower oil

88. Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes?

Correct : D. Sodium chloride

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

Correct : B. Hydrogen peroxide

90. A mixture of benzene and toluene forms

Correct : B. Ideal solution

91. The aqueous solution of which acids is called Vinegar -

Correct : C. Acetic acid

92. What happens to its potential energy when an object is taken to high altitude?

Correct : A. Its potential energy increases

93. Which one of the following noble gases is not found in the atmosphere?

Correct : C. Radon

94. The fuel used in an atomic reactor is –

Correct : D. Uranium

95. Mortar is a mixture of water sand and

Correct : A. Slaked lime

96. The element which is used for vulcanizing rubber –

Correct : A. Sulphur

97. Which of the following is responsible for the extra strength of pyrex glass?

Correct : C. Borax

98. Raw materials used for the manufacture of glass are –

Correct : A. sand, soda, limestone

99. Which of the following is used in welding broken pieces of iron rails and machine parts?

Correct : C. Aluminium powder

100. Stainless steel is usually made by alloying the steel with –

Correct : C. chromium and nickel