Chemical Engineering Thermodynamics MCQs

Question 1

Fugacity and pressure are numerically equal, when the gas is

Accepted Answer

In ideal state

Answer

In standard state

Answer

At high pressure

Answer

At low temperature

Question 2

Lenz's law results from the law of conservation of

Accepted Answer

Energy

Answer

Mass

Answer

Momentum

Answer

None of these

Question 3

Entropy change for an irreversible isolated system is

Accepted Answer

> 0

Answer

∞

Answer

0

Answer

< 0

Question 4

What happens in a reversible adiabatic compression?

Accepted Answer

Heating occurs

Answer

Cooling occurs

Answer

Pressure is constant

Answer

Temperature is constant

Question 5

The equation, PV = nRT, is best obeyed by gases at

Accepted Answer

Low pressure & high temperature

Answer

High pressure & low temperature

Answer

Low pressure & low temperature

Answer

None of these

Question 6

Which one is true for a throttling process?

Accepted Answer

The inversion temperature is different for different gases

Answer

A gas may have more than one inversion temperatures

Answer

The inversion temperature is same for all gases

Answer

The inversion temperature is the temperature at which Joule-Thomson co-efficient is infinity

Question 7

Pick out the wrong statement.

Accepted Answer

At constant pressure, solubility of a gas in a liquid diminishes with rise in temperature

Answer

Normally, the gases which are easily liquified, are more soluble in common solvents

Answer

The gases which are capable of forming ions in aqueous solution, are much more soluble in water than in other solvents

Answer

At constant pressure, solubility of a gas in a liquid increases with rise in temperature

Question 8

Molar heat capacity of water in equilibrium with ice at constant pressure is __________ Kcal/kg mole . °K

Accepted Answer

∞

Answer

0

Answer

50

Answer

100

Question 9

With increase in reduced temperature, the fugacity co-efficient of a gas at constant reduced pressure

Accepted Answer

Increases

Answer

Decreases

Answer

Remains same

Answer

Decreases linearly