Chemical Engineering Thermodynamics MCQs

Question 1

All gases except __________ shows a cooling effect during throttling process at atmospheric temperature and pressure.

Accepted Answer

Hydrogen

Answer

Oxygen

Answer

Nitrogen

Answer

Air

Question 2

For equilibrium process (i.e. reversible) in an isolated system

Accepted Answer

ds = 0

Answer

ds < 0

Answer

ds > 0

Answer

ds = Constant

Question 3

Which of the following decreases with increase in pressure?

Accepted Answer

Melting point of ice

Answer

Melting point of wax

Answer

Boiling point of liquids

Answer

None of these

Question 4

At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero. This follows from the

Accepted Answer

Third law of thermodynamics

Answer

Second law of thermodynamics

Answer

Nernst heat theorem

Answer

Maxwell's relations

Question 5

An isentropic process is carried out at constant

Accepted Answer

Volume

Answer

Pressure

Answer

Temperature

Answer

All of the above

Question 6

The difference between isothermal compressibility and adiabatic compressibility for an ideal gas is

Accepted Answer

+ve

Answer

0

Answer

-ve

Answer

∞

Question 7

The internal energy of an incompressible fluid depends upon its

Accepted Answer

Temperature

Answer

Pressure

Answer

Both A & B

Answer

Neither A nor B

Question 8

Normal temperature and pressure (N.T.P.) corresponds to

Accepted Answer

20°C and 760 mm Hg

Answer

0°C and 760 mm Hg

Answer

15°C and 760 mm Hg

Answer

0°C and 1 kgf/cm2

Question 9

For an incompressible fluid, the __________ is a function of both pressure as well as temperature.

Accepted Answer

Enthalpy

Answer

Internal energy

Answer

Entropy

Answer

All of the above