2. The temperature of oxy-acetylene flame is around

3. The chief source of naphthalene is

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

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

6. Petroleum consists of a mixture of

8. The main source of carbon monoxide is

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

10. If we burn graphite,

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

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

15. Helium gas is filled in balloons because

20. The metals commonly used for electroplating are

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

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

26. Mixture can be

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

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

30. The working of a dry cell is based on

32. Domestic cooking gas consists mostly of

33. L.P.G. is mostly liquefied

34. White coal is

37. A non-electronic conductor is

38. Conversion of chemical energy into electrical energy occurs in

39. The quality of petrol is expressed in terms of

41. A balloon filled with helium rises in air because

42. The anode in a dry cell consists of

45. Coal is formed from

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

49. Combustion of a candle is a/an

50. Which one is the purest form of carbon?

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

53. The charcoal used to decolourise brown sugar solution is

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

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

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

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

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

66. The pollutant responsible for ozone holes is ________

67. Rusting of iron takes place due to

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

73. Water gas is the combination of

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

76. Candle is a mixture of

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

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

79. Which one is a naturally occuring noble gas?

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

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

83. Element 106 was discovered by

84. The major component in the LPG is

85. Galvanization of iron is carried out using

87. Piped Natural Gas (PNG) is used for

89. Galvanization is the :

92. The most abundant inert gas in the atmosphere is

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

94. Which among the following metals provides amphoteric oxide ?

95. Which of the following is the petroleum wax ?

96. The gas used for filling weather balloons is

97. The metal chiefly used for galvanising iron is :

100. The wire of flash bulb is made of: