4

Carnot

Air

Absorption

vapour-ejection

C. Absorption

4

# Solid and liquid phases of a substance are in equilibrium at the

Critical temperature

Melting point

Freezing point

Both (B) and (C)

4

50 kcal/hr

200 BTU/hr

200 BTU/minute

200 BTU/day

4

Freezing

Triple

Boiling

Boyle

4

# Which of the following equations is used for the prediction of activity co-efficient from experiments?

Van Laar equation

Margules equation

Wilson's equation

All (A), (B) and (C)

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

# Pick out the wrong statement pertaining to the decomposition of PCl5 represented by, PCl5 PCl3 + Cl2.Degree of dissociation of PCl5 will

Increase on addition of an inert gas at constant pressure

Decrease on increasing the pressure of the system

None of these

4

RT d ln P

RT d ln f

R d ln f

None of these

4

# Second law of thermodynamics is concerned with the

Amount of energy transferred

Direction of energy transfer

Irreversible processes only

Non-cyclic processes only

4

# The internal energy of a gas obeying P (V - b) RT (where, b is a positive constant and has a constant Cv), depends upon its

Pressure

Volume

Temperature

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

4

Volume

Density

Temperature

Pressure

4

# In an ideal gas mixture, fugacity of a species is equal to its

Vapor pressure

Partial pressure

Chemical potential

None of these

4

# Which of the following is not an intensive property?

Chemical potential

Surface tension

Heat capacity

None of these

4

# In any spontaneous process, the __________ free energy decreases.

Helmholtz

Gibbs

Both a & b

Neither 'a' nor 'b'

4

# The ratio of equilibrium constants (Kp2/Kp1) at two different temperatures is given by

(R/ΔH) (1/T1 - 1/T2)

(ΔH/R) (1/T1 - 1/T2)

(ΔH/R) (1/T2 - 1/T1)

(1/R) (1/T1 - 1/T2)

4

(dF)T, p < 0

(dF)T, p > 0

(dF)T, p = 0

(dA)T, v < 0

4

# Compressibility factor-reduced pressure plot on reduced co-ordinates facilitates

Use of only one graph for all gases

Covering of wide range

Easier plotting

More accurate plotting

4

# The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture. This is

The statement as per Gibbs-Helmholtz

Called Lewis-Randall rule

Henry's law

None of these

4

Logarithmic

Arithmetic

Geometric

Harmonic

4

CO2

H2

O2

N2

4

Zeroth

First

Second

Third

4

Isothermal

Isobaric

Isochoric

4

0

1

2

3

4

3

4

5

6

4

0

1

< 1

> 1

4

# When a gas is expanded from high pressure region to low pressure region; temperature change occurs. This phenomenon is related to the

Gibbs-Duhem equation

Gibbs-Helmholtz equation

Third law of thermodynamics

Joule-Thomson effect

4

# The most important application of distribution law is in

Evaporation

Liquid extraction

Drying

Distillation

4

# The equation Tds = dE - PdV applies to

Single phase fluid of varying composition

Single phase fluid of constant composition

Open as well as closed systems

Both (B) and (C)

4

# Work done is a

Property of the system

Path function

Point function

State description of a system

4

# High pressure steam is expanded adiabatically and reversibly through a well insulated turbine, which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by ΔH and ΔS respectively for this process:

Δ H = 0 and ΔS = 0

Δ H ≠ 0 and ΔS = 0

Δ H ≠ 0 and ΔS ≠ 0

Δ H = 0 and ΔS ≠ 0