4

Isolated

Closed

Open

None of these

C. Open

4

The principle applied in liquefaction of gases is

Joule-Thomson effect

Both (A) and (B)

Neither (A) nor (B)

4

Saturated vapour

Solid

Gas

Liquid

4

Gibbs-Duhem equation relates composition in liquid phase and the __________ at constant temperature & pressure.

Fugacity

Partial pressure

Activity co-efficient

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

4

In a homogeneous solution, the fugacity of a component depends upon the

Pressure

Composition

Temperature

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

4

During Joule-Thomson expansion of gases

Enthalpy remains constant

Entropy remains constant

Temperature remains constant

None of these

4

Work done is a

Property of the system

Path function

Point function

State description of a system

4

Bomb

Separating

Bucket

Throttling

4

If the vapour pressure at two temperatures of a solid phase in equilibrium with its liquid phase are known, then the latent heat of fusion can be calculated by the

Maxwell's equation

Clausius-Clapeyron Equation

Van Laar equation

Nernst Heat Theorem

4

0

1

None of these

4

Zero

Positive

Negative

None of these

4

Expansion valve

Condenser

Refrigerator

Compressor

4

2

0

3

1

4

(T2 - T1)/T2

(T2 - T1)/T1

(T1 - T2)/T2

(T1 - T2)/T1

4

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

Calorific value

Heat of reaction

Heat of combustion

Heat of formation

4

Tea kept in a thermos flask is vigorously shaken. If the tea is considered as a system, then its temperature will

Increase

Decrease

Remain unchanged

First fall and then rise

4

0

273

25

None of these

4

CO2

H2

O2

N2

4

-273

0

-78

5

4

Mollier chart is a __________ plot.

Pressure vs. enthalpy

Pressure vs. volume

Enthalpy vs. entropy

Temperature vs. entropy

4

(dF)T, p <0

(dF)T, p = 0

(dF)T, p > 0

(dA)T, v >0

4

Volume

Temperature

Pressure

None of these

4

Pick out the wrong statement:

The expansion of a gas in vacuum is an irreversible process

An isometric process is a constant pressure process

Entropy change for a reversible adiabatic process is zero

Free energy change for a spontaneous process is negative

4

If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will

Increase

Decrease

Remain unaltered

Increase or decrease; depends on the particular reaction

4

In any spontaneous process, the __________ free energy decreases.

Helmholtz

Gibbs

Both a & b

Neither 'a' nor 'b'

4

Minimum

Zero

Maximum

Indeterminate

4

Entropy

Temperature

Internal energy

Enthalpy

4

A large iceberg melts at the base, but not at the top, because of the reason that

Ice at the base contains impurities which lowers its melting point

Due to the high pressure at the base, its melting point reduces

The iceberg remains in a warmer condition at the base

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

4

0

+ ve

- ve

4

As pressure approaches zero, the ratio of fugacity to pressure (f/P) for a gas approaches

Zero

Unity

Infinity

An indeterminate value