Chemical Engineering Thermodynamics MCQs

Question 1

Which of the following units is not present in both the vapor compression refrigeration system and absorption refrigeration system?

Accepted Answer

Compressor

Answer

Expansion valve

Answer

Condenser

Answer

Refrigerator

Question 2

Which is not constant for an ideal gas?

Accepted Answer

$${\left( {\frac{{\partial {	ext{P}}}}{{\partial {	ext{V}}}}} ight)_{	ext{T}}}$$

Answer

$${\left( {\frac{{\partial {	ext{V}}}}{{\partial {	ext{T}}}}} ight)_{	ext{P}}}$$

Answer

$${\left( {\frac{{\partial {	ext{P}}}}{{\partial {	ext{V}}}}} ight)_{	ext{V}}}$$

Answer

All of the above

Question 3

Heat evolved/absorbed during conversion of a substance from one allotropic form to another is termed as the heat of

Accepted Answer

Transition

Answer

Fusion

Answer

Vaporisation

Answer

None of these

Question 4

Absorption/evolution of heat during conversion of a substance from one allotropic form to another is termed as the heat of

Accepted Answer

Transition

Answer

Sublimation

Answer

Fusion

Answer

Vaporisation

Question 5

Work done may be calculated by the expression ∫p dA for __________ processes.

Accepted Answer

Both A and B

Answer

Non-flow reversible

Answer

Adiabatic

Answer

Neither A nor B

Question 6

With increase in temperature, the atomic heat capacities of all solid elements

Accepted Answer

Increases

Answer

Decreases

Answer

Remains unchanged

Answer

Decreases linearly

Question 7

When a gas is subjected to adiabatic expansion, it gets cooled due to

Accepted Answer

Energy spent in doing work

Answer

Decrease in velocity

Answer

Decrease in temperature

Answer

Decrease in kinetic energy

Question 8

Pick out the wrong statement.

Accepted Answer

None of these

Answer

System (of partially miscible liquid pairs), in which the mutual solubility increases with rise in temperature, are said to possess an upper consolute temperature

Answer

Systems, in which the mutual solubility increases with decrease in temperature, are said to possess lower consolute temperature

Answer

Nicotine-water system shows both an upper as well as a lower consolute temperature, implying that they are partially miscible between these two limiting temperatures

Question 9

Generation of heat by friction is an example of a/an __________ change.

Accepted Answer

Irreversible

Answer

Isothermal

Answer

Adiabatic

Answer

Reversible