Chemical Engineering Thermodynamics MCQs

Question 1

The work done in isothermal compression compared to that in adiabatic compression will be

Accepted Answer

More

Answer

Less

Answer

Same

Answer

More or less depending upon the extent of work done

Question 2

What happens in a reversible adiabatic expansion process?

Accepted Answer

Cooling takes place

Answer

Heating takes place

Answer

Pressure is constant

Answer

Temperature is constant

Question 3

Which of the following is affected by the temperature?

Accepted Answer

All of the above

Answer

Fugacity

Answer

Activity co-efficient

Answer

Free energy

Question 4

Which is an example of closed system?

Accepted Answer

Lquid cooling system of an automobile

Answer

Air compressor

Answer

Boiler

Answer

None of these

Question 5

Entropy of an ideal gas depends upon its

Accepted Answer

Both A & B

Answer

Pressure

Answer

Temperature

Answer

Neither A nor B

Question 6

At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.)

Accepted Answer

μ° + RT lnf

Answer

μ°+ R lnf

Answer

μ° + T lnf

Answer

μ° + $$\frac{{	ext{R}}}{{	ext{T}}}$$ lnf

Question 7

Partial molal quantities are important in the study of

Accepted Answer

Non-ideal mixtures

Answer

Ideal gases

Answer

Ideal solutions

Answer

A pure component

Question 8

For organic compounds, group contribution method can be used for the estimation of

Accepted Answer

Critical properties

Answer

Specific gravity

Answer

Specific volume

Answer

Thermal conductivity

Question 9

The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by $$\frac{{{{	ext{T}}_1} - {{	ext{T}}_2}}}{{{{	ext{T}}_1}}}.$$ The co-efficient of performance (C.O.P.) of a Carnot heat pump operating between T1 and T2 is given by

Accepted Answer

$$\frac{{{{	ext{T}}_1}}}{{{{	ext{T}}_1} - {{	ext{T}}_2}}}$$

Answer

$$\frac{{{{	ext{T}}_2}}}{{{{	ext{T}}_1} - {{	ext{T}}_2}}}$$

Answer

$$\frac{{{{	ext{T}}_1}}}{{{{	ext{T}}_2}}}$$

Answer

$$\frac{{{{	ext{T}}_2}}}{{{{	ext{T}}_1}}}$$