chemical engineering thermodynamics for chemical chemical engineering MCQs – Page 6

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 Review each marked answer and report any item that may be outdated or unclear.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
101. One ton of refrigeration capacity is equivalent to the heat removal rate of____________________?
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A. 200 BTU/minute

B. 200 BTU/hr

C. 50 kcal/hr

D. 200 BTU/day

102. Refrigerants commonly used for domestic refrigerators are_________________?
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A. Ethyl chloride or methyl chloride

B. Freon-12

C. NH3 or CO2

D. Propane

103. What is the degree of freedom for a system comprising liquid water equilibrium with its vapour ?
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A. 2

B. 3

C. 0

D. 1
104. Standard temperature and pressure (S.T.P.) is__________________?
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A. 0C and 750 mm Hg

B. 0C and 1 kgf/cm2

C. 15C and 750 mm Hg

D. 15C and 1 kgf/cm2

105. Work done in case of free expansion is____________________?
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A. Zero

B. Negative

C. None of these

D. Indeterminate

106. For an incompressible fluid, the _______________ is a function of both pressure as well as temperature?
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A. Internal energy

B. Entropy

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

D. Enthalpy
107. When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change. This is called the_______________?
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A. Kopps rule

B. Law of corresponding state

C. Arrhenius hypothesis

D. Le-Chatelier principle
108. In the reaction; N2 + O2 ? 2NO, increasing the pressure will result in_________________?
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A. Shifting the equilibrium towards left

B. Shifting the equilibrium towards right

C. None of these

D. No change in equilibrium condition
109. Forward reaction will be favoured for the exothermic reaction, represented by CO + H2O ? CO2 + H2, by_________________?
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A. Low temperature and high pressure

B. High temperature and low pressure

C. High temperature and high pressure

D. Low temperature and low pressure

110. ____________ does not change during phase transformation processes like sublimation, melting & vaporisation?
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A. Entropy

B. Internal energy

C. Gibbs free energy

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

111. The intensive properties are_____________?
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A. Molar volume, density, viscosity and boiling point

B. Refractive index and surface tension

C. Both A. and B

D. None of these

112. Activity co-efficient is a measure of the____________________?
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A. Vapour pressure of liquid

B. None of these

C. Departure from ideal solution behaviour

D. Departure of gas phase from ideal gas law

113. Equilibrium constant of a reaction varies with the____________________?
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A. Pressure

B. None of these

C. Initial concentration of the reactant

D. Temperature
114. Which of the following non-flow reversible compression processes require maximum work ?
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A. Isobaric process

B. All require same work

C. Adiabatic process

D. Isothermal process

115. At ____________ point, all the three phases (i.e. solid, liquid and gas) co-exist ?
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A. Critical

B. Eutectic

C. Plait

D. Triple
116. The reaction A (l) ? R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The numbers of degrees of freedom are ?
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A. 3

B. 1

C. 2

D. 0

117. Which of the following exemplifies an adiabatic process ?
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A. Condensation of alcohol vapor

B. Sudden bursting of a cycle tube

C. Evaporation of water

D. Melting of ice

118. Sound waves propagation in air exemplifies an ______________ process?
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A. Adiabatic

B. Isothermal

C. None of these

D. Isometric

119. Normal temperature and pressure (N.T.P.) corresponds to ___________________?
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A. 0C and 760 mm Hg

B. 20C and 760 mm Hg

C. 0C and 1 kgf/cm2

D. 15C and 760 mm Hg

120. The second law of thermodynamics states that___________________?
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A. None of the above

B. It is not possible to transfer heat from a lower temperature to a higher temperature

C. The energy change of a system undergoing any reversible process is zero

D. The total energy of system and surrounding remains the same