Chemical Engineering Thermodynamics MCQs

Question 1

Joule-Thomson Co-efficient at any point on the inversion curve is

Accepted Answer

0

Answer

∞

Answer

+ ve

Answer

-ve

Question 2

Translational kinetic energy of molecules of an ideal gas is proportional to (where, T = absolute temperature of the gas)

Accepted Answer

T

Answer

$$\sqrt {	ext{T}} $$

Answer

T2

Answer

$$\frac{1}{{\sqrt {	ext{T}} }}$$

Question 3

If two pure liquid constituents are mixed in any proportion to give an ideal solution, there is no change in

Accepted Answer

Both A & B

Answer

Volume

Answer

Enthalpy

Answer

Neither A nor B

Question 4

Joule-Thomson co-efficient depends on the

Accepted Answer

Both A & B

Answer

Pressure

Answer

Temperature

Answer

Neither A nor B

Question 5

In Joule-Thomson porous plug experiment, the

Accepted Answer

None of these

Answer

Enthalpy does not remain constant

Answer

Entire apparatus is exposed to surroundings

Answer

Temperature remains constant

Question 6

In case of steady flow compression polytropic process (PVn = constant), the work done on air is the lowest, when

Accepted Answer

N = 1

Answer

N = y = 1.4

Answer

N = 0

Answer

N = 1.66

Question 7

Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the

Accepted Answer

Heat of combustion

Answer

Calorific value

Answer

Heat of reaction

Answer

Heat of formation

Question 8

Pick out the correct statement:

Accepted Answer

Under reversible conditions, the adiabatic work is less than isothermal work

Answer

In an isothermal system, irreversible work is more than reversible work

Answer

Heat, work, enthalpy and entropy are all 'state functions'

Answer

Matter and energy can not be exchanged with the surroundings in a closed system

Question 9

For a spontaneous process, free energy

Accepted Answer

Decreases whereas the entropy increases

Answer

Is zero

Answer

Increases

Answer

And entropy both decrease