4

H = E - PV

H = F - TS

H - E = PV

None of these

C. H - E = PV

4

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

Increases

Decreases

Remain same

Decreases linearly

4

F = E - TS

F = H - TS

F = H + TS

F = E + TS

4

1st

Zeroth

3rd

None of these

4

x

x + 1

x + 2

x + 3

4

-94 kcal

> -94 kcal

< - 94 kcal

Zero

4

Consider the process A & B shown in the figure given below: In this case, it is possible that

Both the processes are isothermal

Process A is isothermal while B is adiabatic

Process A is adiabatic while B is isothermal

4

For a multi-component system, the term chemical potential is equivalent to the

Molal concentration difference

Molar free energy

Partial molar free energy

Molar free energy change

4

Requisites of a reversible process is that the

System and surroundings pressure be equal

Friction in the system should be absent

System and surroundings temperature be equal

None of these

4

Pick out the wrong statement.

The net change in entropy in any reversible cycle is always zero

The entropy of the system as a whole in an irreversible process increases

The entropy of the universe tends to a maximum

The entropy of a substance does not remain constant during a reversible adiabatic change

4

Maxwell's relation corresponding to the identity, dH = dS = Vdp + Σμi dni is

(∂T/∂V)S, ni = -(∂P/∂S)V, ni

(∂S/∂P)T, ni = (∂V/∂T)P, ni

(∂S/∂V)T, ni = (∂P/∂T)V, ni

(∂T/∂P)S, ni = (∂V/∂S)P, ni

4

First law of thermodynamics deals with the

Direction of energy transfer

Reversible processes only

Irreversible processes only

None of these

4

Which of the following processes cannot be made reversible even under ideal condition of operation?

Free expansion of a gas

Compression of air in a compressor

Expansion of steam in a turbine

All (A), (B) & (C)

4

Zero

Positive

Negative

None of these

4

30554

10373

4988.4

4364.9

4

1

< 1

> 1

>> 1

4

__________ calorimeter is normally used for measuring the dryness fraction of steam, when it is very low.

Bucket

Throttling

Separating

A combination of separating & throttling

4

0

> 0

< 0

None of these

4

0

< 0

< 1

> 1

4

Internal energy is equal to the heat absorbed in case of a/an __________ process.

Constant volume

Polytropic

Constant pressure

4

(∂H/∂T)P is the mathematical expression for

CV

Entropy change

Gibbs free energy

None of these

4

Pressure

Solubility

Temperature

None of these

4

Carnot

Air

Absorption

vapour-ejection

4

Indeterminate

Zero

Negative

None of these

4

Equilibrium constant decreases as the temperature

Increases, for an exothermic reaction

Decreases, for an exothermic reaction

Increases, for an endothermic reaction

None of these

4

P + F - C = 2

C = P - F + 2

F = C - P - 2

P = F - C - 2

4

3

2

1

0

4

Co-efficient of Performance (COP) of a refrigerator is the ratio of the

Work required to refrigeration obtained

Refrigeration obtained to the work required

Lower to higher temperature

Higher to lower temperature

4

Zeroth

First

Second

Third

4

0.25

0.5

0.75

1