0

+ve

-ve

∞

B. +ve

Increased COP

Same COP

Decreased COP

Increased or decreased COP; depending upon the type of refrigerant

The available energy in an isolated system for all irreversible (real) processes decreases

The efficiency of a Carnot engine increases, if the sink temperature is decreased

The reversible work for compression in non-flow process under isothermal condition is the change in Helmholtz free energy

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

It should be non-explosive

It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils

Its vapor pressure at the condenser temperature should be very high

None of these

_{i} = (∂F/∂n_{i})_{T, P, ni}

_{i} = (∂A/∂n_{i})_{T, P, ni}

_{i} = (∂F/∂n_{i})_{T, P}

_{i} = (∂A/∂n_{i})_{T, P}

Increases

Decreases

Remains unchanged

May increase or decrease; depends on the gas

1

2

3

4

T

√T

^{2}

1/√T

_{S} = (∂P/∂V)_{T}

_{S} = [(∂P/∂V)_{T}]^{Y}

_{S} = y(∂P/∂V)_{T}

_{S} = 1/y(∂P/∂V)_{T}

Superheated vapour

Partially condensed vapour with quality of 0.9

Saturated vapour

Partially condensed vapour with quality of 0.1

Sublimation

Vaporisation

Melting

Either (A), (B) or (C)

4 J

∞

0

8 J

dP/dT = ΔH/TΔV

ln P = - (ΔH/RT) + constant

_{P}

None of these

Does not depend upon temperature

Is independent of pressure only

Is independent of volume only

Is independent of both pressure and volume

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

0.15

1.5

4.5

6.5

_{2}^{2}

_{1}

_{2}

_{1}^{2}

Critical

Boyle

Inversion

Reduced

Compression ratio of an Otto engine is comparatively higher than a diesel engine

Efficiency of an Otto engine is higher than that of a diesel engine for the same compression ratio

Otto engine efficiency decreases with the rise in compression ratio, due to decrease in work produced per quantity of heat

Diesel engine normally operates at lower compression ratio than an Otto engine for an equal output of work

Isothermal

Adiabatic

Both (A) & (B)

Neither (A) nor (B)

Activity co-efficient is dimensionless.

In case of an ideal gas, the fugacity is equal to its pressure.

In a mixture of ideal gases, the fugacity of a component is equal to the partial pressure of the component.

The fugacity co-efficient is zero for an ideal gas

Doubling the absolute temperature as well as pressure of the gas

Reducing pressure to one fourth at constant temperature

Reducing temperature to one fourth at constant pressure

Reducing the temperature to half and doubling the pressure

Sub-cooled

Saturated

Non-solidifiable

None of these

Positive

Negative

Zero

May be positive or negative

Shifting the equilibrium towards right

Shifting the equilibrium towards left

No change in equilibrium condition

None of these

-273

0

-78

5

Pressure

Volume

Temperature

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

Gibbs-Duhem equation

Gibbs-Helmholtz equation

Third law of thermodynamics

Joule-Thomson effect

Maxwell's equation

Clausius-Clapeyron Equation

Van Laar equation

Nernst Heat Theorem

0

1

2

3

μ° + RT ln f

μ°+ R ln f

μ° + T ln f

μ° + R/T ln f