78. Relative humidity of air can decrease in spite of increase in humidity if
(A) _ pressure is increased (B) temperature is increased
(C) temperature is decreased (D) cannot happen

79. At low concentration of a gas in a liquid, which of the following laws is most
appropriate ?
(^) Raoult’s law (8) Henry’s law
(೮) 1021018 law (D) Amagat’s law

80. Heat required to raise temperature of 1 kg solution, with mean specific heat capacity
3.5 kI/kgK), from 300 K to 400 K is

(A) 700 kJ (B) 7007
(0) 3501 (D) 350147

81. Boiling point of a heterogeneous mixture is
(A) same as that of high boiling component
(B) same as that of low boiling component
(C) 1688 than boiling point of all the components
(D) more than boiling point of all the components

82. Temperature at which equilibrium vapour pressure of a liquid equals existing partial
pressure of vapour in a mixture is the mixture’s
(^) dew point (8) _ boiling point
(0) freezing point (D) | sublimation point

83. Components A and B react to form product C, as per the reaction, A+B -> C. Heat of
combustion for A, B காம்‌ are respectively 330 kcal, 200 kcal and 500 keal. Standard
heat of the reaction is

(A) 300೩1 (B) —30kcal
(ಲ) - 530 kcal (D) 530 kcal

84. Adiabatic flame temperature of a fuel, attained by burning the fuel with theoretically
required amount of pure Oxygen is 1215 K. If theoretically required amount of air is used
instead of pure Oxygen, the flame temperature can be

(A) 12151 (B) more than 1215 6
(0 1688 than 1215K (D) cannot be predicted

85. Pressure drop ina packed bed for high Reynolds number is given by
(A) Kozeny Carman equation (B) Burke Plummer equation
(೮) Bernoulli’s equation (D) Hagen Poiseuille equation

073/202 = ` 12 A