61. Activated Charcoal is used to remove colouring matter from pure substances by
62. The molecular mass of a gas is
63. The value of gas constant R in Ergs deg–1 mole–1 is
64. The absolute temperature of a gas is doubled and the pressure is reduced to half, the volume of the gas
65. Isobars are lines joining places having equal
66. Two moles of an ideal gas expand freely into vacuum. The work done by the gas is
67. The Fungus which is used in the alcohol industry is
68. Which of the following is used to denature ethanol ?
69. Ethanol containing 5% water is known as
70. Alcohol prepared by the distillation of wood is :
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