Chemical Engineering Thermodynamics MCQs

Question 1

__________ law of thermodynamics ascertains the direction of a particular spontaneous process.

Accepted Answer

Second

Answer

Zeroth

Answer

First

Answer

Third

Question 2

Grams of butane (C4H10) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be

Accepted Answer

1160

Answer

580

Answer

640

Answer

Data insufficient; can't be computed

Question 3

The adiabatic throttling process of a perfect gas is one of constant enthalpy

Accepted Answer

Which can be performed in a pipe with a constriction

Answer

In which there is a temperature drop

Answer

Which is exemplified by a non-steady flow expansion

Answer

In which there is an increase in temperature

Question 4

Number of phases in a colloidal system are

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 5

The amount of heat required to decompose a compound into its elements is __________ the heat of formation of that compound from its elements.

Accepted Answer

Same as

Answer

Less than

Answer

More than

Answer

Not related to

Question 6

Heat requirement for decomposition of a compound into its elements is __________ that is evolved during the formation of that compound from its elements.

Accepted Answer

The same

Answer

Less than

Answer

Greater than

Answer

Different than

Question 7

In case of the decomposition of hydroiodic acid (2H$$I$$ ⇋ H2 + $${{I_2}}$$), addition of H2 (at equilibrium condition) will

Accepted Answer

Diminish the degree of dissociation of H$$I$$

Answer

Increase the partial pressure of $${{I_2}}$$

Answer

Decrease the partial pressure of H$$I$$

Answer

None of these

Question 8

__________ does not change during phase transformation processes like sublimation, melting & vaporisation.

Accepted Answer

Gibbs free energy

Answer

Entropy

Answer

Internal energy

Answer

All of the above

Question 9

Adiabatic compression of a saturated water vapour makes it

Accepted Answer

Superheated

Answer

Supersaturated

Answer

Both A and B

Answer

Neither A nor B