4

# Which of the following is an extensive property of a system?

Heat capacity

Molal heat capacity

Pressure

Concentration

A. Heat capacity

4

0

+ve

-ve

4

Saturated vapour

Solid

Gas

Liquid

4

# Water on heating from 1 to 4°C

Contracts

Expands

Has same volume

May contract or expand

4

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

Pressure

Composition

Temperature

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

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

Gibbs-Duhem

Gibbs-Helmholtz

Maxwell's

None of these

4

# The standard state of a gas (at a given temperature) is the state in which fugacity is equal to

Unity

Activity

Both (A) & (B)

Neither (A) nor (B)

4

2

0

3

1

4

# When liquid and vapour phases of one component system are in equilibrium (at a given temperature and pressure), the molar free energy is

More in vapour phase

More in liquid phase

Same in both the phases

Replaced by chemical potential which is more in vapour phase

4

# Which of the following decreases with increase in pressure?

Melting point of ice

Melting point of wax

Boiling point of liquids

None of these

4

3

1

2

0

4

Less than

More than

Same as

Not related to

4

# The compressibility factor for an ideal gas is 1. Its value for any other real gas is

1

< 1

> 1

Either (B) or (C), depends on the nature of the gas

4

A . x22

Ax1

Ax2

Ax12

4

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

Volume

Enthalpy

Both (A) & (B)

Neither (A) nor (B)

4

# Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.

Decreases

Increases

Remains constant

Decreases logarithmically

4

-1.87

0

1.26

3.91

4

Specific volume

Temperature

Mass

Pressure

4

# Fugacity co-efficient of a substance is the ratio of its fugacity to

Mole fraction

Activity

Pressure

Activity co-efficient

4

# Pick out the wrong statement.

System (of partially miscible liquid pairs), in which the mutual solubility increases with rise in temperature, are said to possess an upper consolute temperature

Systems, in which the mutual solubility increases with decrease in temperature, are said to possess lower consolute temperature

Nicotine-water system shows both an upper as well as a lower consolute temperature, implying that they are partially miscible between these two limiting temperatures

None of these

4

# Which of the following is not an intensive property?

Molar heat capacity

Internal energy

Viscosity

None of these

4

# Cv for an ideal gas

Does not depend upon temperature

Is independent of pressure only

Is independent of volume only

Is independent of both pressure and volume

4

# During adiabatic expansion of gas

Pressure remains constant

Pressure is increased

Temperature remains constant

None of these

4

Eutectic

Triple

Plait

Critical

4

# What is the value of maximum COP in case of absorption refrigeration, if refrigeration provided is at temperature, TR (where, T1 and T2 are source & surrounding temperatures respectively.)?

TR/(T2 - TR) × (T1 - T2)/T1

TR/(T2 - TR) × T1/(T1 - T2)

TR/(T1 - TR) × (T1 - T2)/T1

None of these

4

# At triple point (for one component system), vapour pressure of solid as compared to that of liquid will be

More

Less

Same

More or less; depending on the system

4

# Out of the following refrigeration cycles, which one has maximum COP?

Air cycle

Carnot cycle

Ordinary vapor compression cycle

Vapor compression with a reversible expansion engine

4

# When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change. This is called the

Le-Chatelier principle

Kopp's rule

Law of corresponding state

Arrhenius hypothesis

4

# Pick out the wrong statement.

The values of (∂P/∂V)T and (∂2P/∂V2)T are zero for a real gas at its critical point

Heat transferred is equal to the change in the enthalpy of the system, for a constant pressure, non-flow, mechanically reversible process

Thermal efficiency of a Carnot engine depends upon the properties of the working fluid besides the source & sink temperatures

During a reversible adiabatic process, the entropy of a substance remains constant