Chemical Engineering Thermodynamics MCQs

Question 1

With increase in pressure (above atmospheric pressure), the Cp of a gas

Accepted Answer

Increases

Answer

Decreases

Answer

Remains unchanged

Answer

First decreases and then increases

Question 2

The unit of equilibrium constant of a chemical reaction is the same as that of

Accepted Answer

None of these

Answer

Molar concentration

Answer

Temperature

Answer

Internal energy

Question 3

Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are

Accepted Answer

Both B & C

Answer

Always greater than one

Answer

Same at the same reduced temperature

Answer

Same at the same reduced pressure

Question 4

During a reversible isothermal expansion of an ideal gas, the entropy change is

Accepted Answer

+ve

Answer

0

Answer

-ve

Answer

∞

Question 5

When a gas in a vessel expands, its internal energy decreases. The process involved is

Accepted Answer

Reversible

Answer

Irreversible

Answer

Isothermal

Answer

Adiabatic

Question 6

Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is

Accepted Answer

2

Answer

1

Answer

4

Answer

3

Question 7

Which of the following is not affected by temperature changes?

Accepted Answer

None of these

Answer

Fugacity

Answer

Activity co-efficient

Answer

Free energy

Question 8

Forward reaction will be favoured for the exothermic reaction, represented by CO + H2O ⇋ CO2 + H2, by

Accepted Answer

Low temperature and high pressure

Answer

Low temperature and low pressure

Answer

High temperature and high pressure

Answer

High temperature and low pressure

Question 9

The principle applied in liquefaction of gases is

Accepted Answer

Both A and B

Answer

Adiabatic expansion

Answer

Joule-Thomson effect

Answer

Neither A nor B