chemical engineering thermodynamics for chemical chemical engineering MCQs – Page 4

Practise multiple-choice questions from chemical engineering thermodynamics for chemical chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering thermodynamics for chemical chemical engineering Mcqs
61. For a reversible process involving only pressure-volume work____________________?
comments icon0

A. (dA)T, v < 0

B. (dF)T, p 0

C. (dF)T, p = 0
62. Critical temperature is defined as the temperature above which a gas will____________________?
comments icon0

A. Immediately liquify

B. Not liquify (barring exceptions)

C. None of these

D. Never liquify however high the pressure may be
63. The shape of T-S diagram for Carnot Cycle is a__________________?
comments icon0

A. Circle

B. Rhombus

C. Rectangle

D. Trapezoid

64. A solute distributes itself between two non-miscible solvents in contact with each other in such a way that, at a constant temperature, the ratio of its concentrations in two layers is constant, irrespective of its total amount. This is_________________?
comments icon0
A. The distribution law

B. None of these

C. A corollary of Henrys law

D. Followed from Margules equation

65. If two gases have same reduced temperature and reduced pressure, then they will have the same____________________?
comments icon0
A. None of these

B. Mass

C. Volume

D. Critical temperature

66. Third law of thermodynamics is helpful in___________________?
comments icon0

A. Prediction of the extent of a chemical reaction

B. Calculating absolute entropies of substances at different temperature

C. Evaluating entropy changes of chemical reaction

D. Both B. and C.
67. Clapeyron Equation deals with the____________________?
comments icon0

A. Calculation of ?F for spontaneous phase change

B. Temperature dependence of heat of phase transition

C. Rate of change of vapour pressure with temperature

D. Effect of an inert gas on vapour pressure

68. The value of Joule-Thomson co-efficient, in case where cooling occurs after the throttling process is________________?
comments icon0

A. 0

B. +ve

C. ?

D. #NAME?

69. Which of the following is not a reversible process ?
comments icon0
A. Solution of NaCl in water at 50C

B. None of these

C. Atmospheric pressure vaporisation of water at 100C

D. Expansion of an ideal gas against constant pressure

70. The adiabatic throttling process of a perfect gas is one of constant enthalpy_________________?
comments icon0

A. In which there is a temperature drop

B. In which there is an increase in temperature

C. Which can be performed in a pipe with a constriction

D. Which is exemplified by a non-steady flow expansion

71. When dilute aqueous solutions of two salts are mixed, the process is associated with ___________________?
comments icon0

A. Decrease in temperature

B. Change in temperature which is a function of composition

C. No change in temperature

D. Increase in temperature
72. The molar excess Gibbs free energy, gE, for a binary liquid mixture at T and P is given by, (gE/RT) = A . x1. x2, where A is a constant. The corresponding equation for ln y1, where y1 is the activity co-efficient of component 1, is__________________?
comments icon0
A. A . x22

B. Ax12

C. Ax2

D. Ax1

73. For an ideal gas, the enthalpy__________________?
comments icon0

A. Decreases with rise in pressure

B. Is independent of pressure

C. Is a path function

D. Increases with rise in pressure

74. Which of the following is an extensive property of a system ?
comments icon0

A. Pressure

B. Concentration

C. Heat capacity

D. Molal heat capacity

75. The number of degree of freedom for an Azeotropic mixture of ethanol and water in vapourliquid equilibrium, is__________________?
comments icon0
A. 1

B. 2

C. 3

D. 0

76. Kopps rule is used to calculate the heat capacity of___________________?
comments icon0

A. Gases

B. Solids

C. All (A), B. & (C)

D. Liquids

77. Which of the following units is not present in both the vapor compression refrigeration system and absorption refrigeration system ?
comments icon0

A. Expansion valve

B. Refrigerator

C. Condenser

D. Compressor
78. Cv is given by__________________?
comments icon0

A. (?V/?T)P

B. (?E/?T)V

C. (?E/?V)T

D. (?E/?P)V

79. With increase in reduced temperature, the fugacity co-efficient of a gas at constant reduced pressure___________________?
comments icon0

A. Remain same

B. Decreases linearly

C. Increases

D. Decreases

80. Work done may be calculated by the expression ? p dA for _____________ processes ?
comments icon0

A. Non-flow reversible

B. Adiabatic

C. Both A. and B

D. Neither A. nor B