Question 71. The molecular velocity of a real gas is proportional to (where, T = absolute temperature of the gas).

Question 72. With rise in pressure, the solubility of gases in solvent, at a fixed temperature

Question 73. The reverse process of fractional crystallisation is called

Question 74. Total energy at a point comprises of __________ energy.

Question 75. One micron is equal to

Question 76. One 'Therm' is equivalent to

Question 77. Refluxing of part of the distillate in a fractionating column is a 'recycling operation', aimed primarily at

Question 78. Isotopes are atoms having the same

Question 79. One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH₄ + 2O₂ → CO₂ + 2H₂O. Both the reactants and products are in gas phase. ΔH°298 = - 730 kJ/mole of methane. If the average specific heat of all the gases/vapour is 40 J/mole.K, the maximum temperature rise of the exhaust gases in °C would be approximately equal to

Question 80. Pick out the wrong unit conversion.