Chemical Engineering Thermodynamics MCQs

Question 1

Claude's liquefaction process employs the cooling of gases by

Accepted Answer

Expansion in an engine

Answer

Following a constant pressure cycle

Answer

Throttling

Answer

None of these

Question 2

A domestic refrigerator has a/an __________ cooled condenser.

Accepted Answer

Air

Answer

Water

Answer

Evaporative

Answer

Gas

Question 3

Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is

Accepted Answer

Zero

Answer

Positive

Answer

Negative

Answer

Infinity

Question 4

At normal boiling point, molar entropy of vaporisation is __________ Joule/K°.mole.

Accepted Answer

92

Answer

72

Answer

142

Answer

192

Question 5

PVy = constant, holds good for an isentropic process, which is

Accepted Answer

Reversible and adiabatic

Answer

Reversible and isothermal

Answer

Isothermal and irreversible

Answer

Adiabatic and irreversible

Question 6

The internal energy of an ideal gas is a function of its __________ only.

Accepted Answer

Temperature

Answer

Molecular size

Answer

Volume

Answer

Pressure

Question 7

Gibbs free energy at constant pressure and temperature under equilibrium conditions is

Accepted Answer

Minimum

Answer

∞

Answer

0

Answer

Maximum

Question 8

Free energy change at equilibrium is

Accepted Answer

Zero

Answer

Positive

Answer

Negative

Answer

Indeterminate

Question 9

In jet refrigerators, the refrigerating fluid is practically always

Accepted Answer

Water

Answer

Ammonia

Answer

Freon

Answer

Brine