4

# Pick out the wrong statement.

Trouton's ratio of non-polar liquids is calculated using Kistyakowsky equation

Thermal efficiency of a Carnot engine is always less than 1

An equation relating pressure, volume and temperature of a gas is called ideal gas equation

None of these

C. An equation relating pressure, volume and temperature of a gas is called ideal gas equation

4

Ideal

Real

Isotonic

None of these

4

Enthalpy

Entropy

Pressure

None of these

4

# Out of the following refrigeration cycles, which one has the minimum COP (Co-efficient of performance)?

Air cycle

Carnot cycle

Ordinary vapour compression cycle

Vapour compression with a reversible expansion engine

4

# The most important application of distribution law is in

Evaporation

Liquid extraction

Drying

Distillation

4

P1ACBP2P1

ACBB1A1A

ACBDA

4

Specific volume

Work

Pressure

Temperature

4

# Chemical potential of ith component of a system is given by

μi = (∂F/∂ni)T, P, ni

μi = (∂A/∂ni)T, P, ni

μi = (∂F/∂ni)T, P

μi = (∂A/∂ni)T, P

4

Entropy

Temperature

Internal energy

Enthalpy

4

None of these

4

V/T = Constant

V ∝ 1/T

V ∝ 1/P

PV/T = Constant

4

# For a multi-component system, the term chemical potential is equivalent to the

Molal concentration difference

Molar free energy

Partial molar free energy

Molar free energy change

4

# The unit of fugacity is the same as that of the

Pressure

Temperature

Volume

Molar concentration

4

ds = 0

ds <0

ds > 0

ds = Constant

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

# Forward reaction will be favoured for the exothermic reaction, represented by CO + H2O CO2 + H2, by

Low temperature and high pressure

Low temperature and low pressure

High temperature and high pressure

High temperature and low pressure

4

# Pick out the wrong statement.

A refrigeration cycle violates the second law of thermodynamics

Refrigeration cycle is normally represented by a temperature vs. entropy plot

In a refrigerator, work required decreases as the temperature of the refrigerator and the temperature at which heat is rejected increases

One ton of refrigeration is equivalent to the rate of heat absorption equal to 3.53 kW

4

# In case of the decomposition of hydroiodic acid (2HI H2 + I2), addition of H2 (at equilibrium condition) will

Increase the partial pressure of I2

Decrease the partial pressure of HI

Diminish the degree of dissociation of HI

None of these

4

# A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect?

Vapor compression cycle using expansion valve

Air refrigeration cycle

Vapor compression cycle using expansion engine

Carnot refrigeration cycle

4

Water

Ammonia

Freon

Brine

4

Less than

Same as

More than

Half

4

# If we increase the pressure on a substance (which is at its triple point), then the triple point

Increases

Decreases

Remains unchanged

May increase or decrease; depends on the substance

4

# Which of the following is not a reversible process?

Expansion of an ideal gas against constant pressure

Atmospheric pressure vaporisation of water at 100°C

Solution of NaCl in water at 50°C

None of these

4

# In the ammonia synthesis reaction, N2 + 3H2 2NH3 + 22.4 kcal, the formation of NH3 will be favoured by

High temperature

Low pressure

Low temperature only

Both low temperature and high pressure

4

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

Mole fraction

Activity

Pressure

Activity co-efficient

4

RT d ln P

R d ln P

R d ln f

None of these

4

Superheated

Desuperheated

Non-condensable

None of these

4

Low T, low P

High T, high P

Low T, high P

High T, low P

4

# With increase in compression ratio, the efficiency of the otto engine

Increases

Decreases

Remain constant

Increases linearly

4

# Which of the following exemplifies an adiabatic process?

Melting of ice

Condensation of alcohol vapor

Sudden bursting of a cycle tube

Evaporation of water