4

# Joule-Thomson co-efficient depends on the

Pressure

Temperature

Both (A) & (B)

Neither (A) nor (B)

C. Both (A) & (B)

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

0°C

273°C

100°C

-273°C

4

# What happens in a reversible adiabatic compression?

Heating occurs

Cooling occurs

Pressure is constant

Temperature is constant

4

+ve

0

-ve

4

Ideal

Real

Isotonic

None of these

4

-1.87

0

1.26

3.91

4

# Choose the condition that must be specified in order to liquify CO2 (triple point for CO2 is - 57°C and 5.2 atm).

Pressure must be kept below 5.2 atm

Temperature must be kept above - 57°C

Pressure must be kept below 5.2 atm. and temperature must be kept above 57°C

Pressure and temperature must be kept below 5.2 atm. and - 57°C respectively

4

0.5

3.5

4.5

8.5

4

# Compressibility factor for almost all the gases are approximately same at the same

Pressure and temperature

Reduced pressure and reduced temperature

Critical pressure and critical temperature

None of these

4

# The Maxwell relation derived from the differential expression for the Helmholtz free energy (dA) is

(∂T/∂V)S = - (∂P/∂S)V

(∂S/∂P)T = - (∂V/∂T)P

(∂V/∂S)P = (∂T/∂P)S

(∂S/∂V)T = (∂P/∂T)V

4

# Internal energy change of a system over one complete cycle in a cyclic process is

Zero

+ve

-ve

Dependent on the path

4

# Cp of a gas at its critical temperature and pressure

Becomes zero

Becomes infinity

Equals 1 kcal/kmol °K

Equals 0.24 kcal/kmol °K

4

A = H - TS

A = E - TS

A = H + TS

None of these

4

# In case of an __________ process, the temperature of the system increases.

Isothermal compression

Isothermal expansion

4

# The activity of an ideal gas is numerically __________ its pressure.

More than

Less than

Equal to

Data insufficient, can't be predicted

4

# The standard Gibbs free energy change of a reaction depends on the equilibrium

Pressure

Temperature

Composition

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

4

Eutectic

Triple

Plait

Critical

4

Heat pump

Heat engine

Carnot engine

None of these

4

Surface tension

Free energy

Specific heat

Refractive index

4

Freezing

Triple

Boiling

Boyle

4

3

1

2

0

4

Temperature

Mass

Volume

Pressure

4

# __________ increases with increase in pressure.

The melting point of wax

The boiling point of a liquid

Both (A) and (B)

Neither (A) nor (B)

4

# For a constant volume process __________ by the system is used only to increase the internal energy.

Heat absorbed

Work done

Both (A) & (B)

Neither (A) nor (B)

4

# __________ explains the equilibrium constant for any chemical reaction.

Henry's law

Law of mass action

Hess's law

None of these

4

# Heat pump

Accomplishes only space heating in winter

Accomplishes only space cooling in summer

Accomplishes both (A) and (B)

Works on Carnot cycle

4

# The unit of equilibrium constant of a chemical reaction is the same as that of

Molar concentration

Temperature

Internal energy

None of these

4

# Fugacity is a measure of the

Escaping tendencies of the same substance in different phases of a system

Relative volatility of a mixture of two miscible liquids

Behaviour of ideal gases

None of these

4

Lowest

Highest

Average

None of these