4

1

2

3

4

B. 2

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

# Pick out the correct statement.

A real gas on expansion in vacuum gets heated up

An ideal gas on expansion in vacuum gets cooled

An ideal gas on expansion in vacuum gets heated up

A real gas on expansion in vacuum cools down whereas ideal gas remains unaffected

4

# The extensive properties are

Volume, mass and number of moles

Free energy, entropy and enthalpy

Both (A) and (B)

None of these

4

Oxygen

Nitrogen

Air

Hydrogen

4

50 kcal/hr

200 BTU/hr

200 BTU/minute

200 BTU/day

4

# As the entropy of the universe is increasing, day by day, the work producing capacity of a heat engine is

Not changed

Decreasing

Increasing

Data sufficient, can't be predicted

4

# The main feature of Carnot refrigeration cycle is that, it

Does not need the addition of external work for its functioning

Transfers heat from high temperature to low temperature

Accomplishes the reverse effect of the heat engine

None of these

4

# (1/V) (∂V/∂T)P is the mathematical expression

Joule-Thomson co-efficient

Specific heat at constant pressure (Cp)

co-efficient of thermal expansion

Specific heat at constant volume (CV)

4

# Clausius-Clapeyron equation is applicable to __________ equilibrium processes.

Solid-vapor

Solid-liquid

Liquid-vapor

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

4

Saturated vapour

Solid

Gas

Liquid

4

0

+ ve

- ve

4

# Which of the following is Clausius-Clapeyron Equation for vaporisation of an ideal gas under the condition that the molar volume of liquid is negligible compared to that of the vapor?

d ln p/dt = Hvap/RT2

d ln p/dt = RT2/Hvap

dp/dt = RT2/Hvap

dp/dt = Hvap/RT2

4

Heat pump

Heat engine

Carnot engine

None of these

4

# Pick out the wrong statement.

The conversion for a gas phase reaction increases with decrease in pressure, if there is an increase in volume accompanying the reaction

With increase in temperature, the equilibrium constant increases for an exothermic reaction

The equilibrium constant of a reaction depends upon temperature only

The conversion for a gas phase reaction increases with increase in pressure, if there is a decrease in volume accompanying the reaction

4

# The internal energy of an incompressible fluid depends upon its

Pressure

Temperature

Both (A) & (B)

Neither (A) nor (B)

4

# Mollier chart is a __________ plot.

Pressure vs. enthalpy

Pressure vs. volume

Enthalpy vs. entropy

Temperature vs. entropy

4

# The equation, PV = nRT, is best obeyed by gases at

Low pressure & high temperature

High pressure & low temperature

Low pressure & low temperature

None of these

4

Isothermal

Isentropic

Polytropic

4

Stirling

Brayton

Rankine

Both (B) and (C)

4

# For an incompressible fluid, the __________ is a function of both pressure as well as temperature.

Internal energy

Enthalpy

Entropy

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

4

# In a homogeneous solution, the activity coefficient of a component depends upon the

Pressure

Composition

Temperature

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

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

# 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

# Clausius-Clapeyron Equation gives accurate result, when the

Vapour pressure is relatively low and the temperature does not vary over wide limits

Vapour obeys the ideal gas law and the latent heat of vaporisation is constant

Volume in the liquid state is negligible compared with that in the vapour state

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

4

# Van Laar equation deals with the activity coefficients in

Binary solutions

Ternary solutions

Azeotropic mixture only

None of these

4

Boyle

Inversion

Critical

Reduced

4

Isometric

Polytropic

Isentropic

Isobaric

4

Only ΔE = 0

Only ΔH =0

ΔE = ΔH = 0

dQ = dE

4

Increase

Decrease

No change

None of these