Chemical Engineering Thermodynamics MCQs

Question 1

While dissolving a gas into a liquid at a constant temperature, the ratio of the concentration of the gas in the solution phase and in the gaseous phase is

Accepted Answer

Constant

Answer

Infinity

Answer

Unity

Answer

Negative

Question 2

Pick out the wrong statement.

Accepted Answer

With increase in temperature, the equilibrium constant increases for an exothermic reaction

Answer

The conversion for a gas phase reaction increases with decrease in pressure, if there is an increase in volume accompanying the reaction

Answer

The equilibrium constant of a reaction depends upon temperature only

Answer

The conversion for a gas phase reaction increases with increase in pressure, if there is a decrease in volume accompanying the reaction

Question 3

Internal energy is equal to the heat absorbed in case of a/an __________ process.

Accepted Answer

Constant volume

Answer

Polytropic

Answer

Adiabatic

Answer

Constant pressure

Question 4

__________ increases with increase in pressure.

Accepted Answer

Both A and B

Answer

The melting point of wax

Answer

The boiling point of a liquid

Answer

Neither A nor B

Question 5

A Carnot cycle consists of the following steps :

Accepted Answer

Two isothermals and two isentropics

Answer

Two isobarics and two isothermals

Answer

Two isochorics and two isobarics

Answer

Two isothermals and two isochorics

Question 6

Throttling process is a/an __________ process.

Accepted Answer

Irreversible and constant enthalpy

Answer

Reversible and isothermal

Answer

Reversible and constant entropy

Answer

Reversible and constant enthalpy

Question 7

The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition.

Accepted Answer

Gibbs free energy

Answer

Internal energy

Answer

Enthalpy

Answer

Helmholtz free energy

Question 8

As the time is passing, entropy of the universe

Accepted Answer

Is increasing

Answer

Is decreasing

Answer

Remains constant

Answer

Data insufficient, can't be predicted

Question 9

The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is

Accepted Answer

More pronounced

Answer

Less pronounced

Answer

Equal

Answer

Data insufficient, can't be predicted