Thermodynamics for Chemical MCQs

14 MCQs — Chemical Engineering MCQs (Page 1 of 2)

Practice Thermodynamics for Chemical MCQs with correct answers and explanations. These questions are from the Chemical Engineering MCQs section.

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Chemical Engineering Subcategories

Chemical Engineering	Chemical Environmental Engineering
Chemical Reaction	Fertilizer Technology
Fluid Mechanics for Chemical	Fuels and Combustion
Materials and Construction	Polymer Technology
Refractory Technology	Thermodynamics for Chemical

Which of the following is an undesirable characteristic of a refrigerant ?

A. It should be non-explosive
B. It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils
C. Its vapor pressure at the condenser temperature should be very high
D. None of these

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Sound waves propagation in air exemplifies an ______________ process?

A. Adiabatic
B. Isothermal
C. Isometric
D. None of these

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Work done may be calculated by the expression ∫ p dA for _____________ processes ?

A. Non-flow reversible
B. Adiabatic
C. Both a. and b
D. Neither a. nor b

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1m3 of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be ?

A. 35 k
B. 174 k
C. 274 k
D. 154 k

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In the reaction; N2 + O2 ⇌ 2NO, increasing the pressure will result in_________________?

A. Shifting the equilibrium towards right
B. Shifting the equilibrium towards left
C. No change in equilibrium condition
D. None of these

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At a given temperature, the volume of a gas dissolved in a solvent _______________ with increase in pressure?

A. Increases
B. Decreases
C. Remains unchanged
D. May increase or decrease; depends on the gas

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____________ does not change during phase transformation processes like sublimation, melting & vaporisation?

A. Entropy
B. Gibbs free energy
C. Internal energy
D. All (a), b. & (c)

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At constant temperature and pressure, for one mole of a pure substance, the ratio of the free energy to the chemical potential is____________________?

A. Zero
B. One
C. Infinity
D. Negative

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Lenz’s law results from the law of conservation of___________________?

A. Mass
B. Momentum
C. Energy
D. None of these

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

A. Expansion valve
B. Condenser
C. Refrigerator
D. Compressor

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