1. Which one is the purest form of carbon?

3. The most abundant inert gas in the atmosphere is

5. Iron filings can be separated from a heterogeneous mixture using the technique of :

6. The pollutant responsible for ozone holes is ________

8. A mixture of water and alcohol can be separated by

9. The quality of petrol is expressed in terms of

10. Which of the following is chiefly present in LPG (Liquefied Petroleum Gas) ?

11. The working of a dry cell is based on

13. Which one of the following metals is used to galvanise iron ?

15. Galvanization of iron is carried out using

16. Piped Natural Gas (PNG) is used for

17. Which one of the following elements is an example of noble gas ?

18. Candle is a mixture of

22. The major component in the LPG is

24. Which among the following metals provides amphoteric oxide ?

25. Except mercury which is the other metal that is liquid at standard conditions for temperature and pressure?

26. Conversion of chemical energy into electrical energy occurs in

30. The hottest part of the gas flame is known as

33. The gas used for filling weather balloons is

34. Petroleum consists of a mixture of

35. The process which does not evolve CO₂ in air is

36. Water is not effective in extinguishing a fire caused by petrol because

37. Man dies in the atmosphere of CO, because it

38. The wire of flash bulb is made of:

39. Element 106 was discovered by

42. Which of the following is very reactive and kept in kerosene?

43. The gas that causes suffocation and death when coal or coke is burnt in a closed room is

45. Which of the following is the major constituent of LPG?

47. Water gas is the combination of

48. Which one is not a pure form of carbon?

49. Highest percentage of carbon is found in which form of coal?

52. Domestic cooking gas consists mostly of

53. Coal is formed from

56. The gas causing acid rain in an industrial area is

59. Which one is a naturally occuring noble gas?

60. The coating of a thin layer of zinc on steel or iron objects is known as

61. If we burn graphite,

62. The anode in a dry cell consists of

65. The metal used to galvanise iron to protect it from rusting is

66. Galvanization is the :

68. The anode of a dry cell is made up of

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

70. Which of the following is the petroleum wax ?

72. The gas that usually causes explosions in coal mines is

74. Thermal electricity is generated by using which of these ?

75. The charcoal used to decolourise brown sugar solution is

76. The metal chiefly used for galvanising iron is :

78. The chief source of naphthalene is

79. L.P.G. is mostly liquefied

80. Helium gas is filled in balloons because

81. Which one out of the following helps in burning ?

84. The main source of carbon monoxide is

87. White coal is

89. The metals commonly used for electroplating are

91. A balloon filled with helium rises in air because

93. The temperature of oxy-acetylene flame is around

96. Rusting of iron takes place due to

98. Mixture can be

99. Combustion of a candle is a/an

100. A non-electronic conductor is