4

Lowest

Highest

Average

None of these

A. Lowest

4

(dF)T, p <0

(dF)T, p = 0

(dF)T, p > 0

(dA)T, v >0

4

# An irreversible process

Is the analog of linear frictionless motion in machines

Is an idealised visualisation of behaviour of a system

Yields the maximum amount of work

Yields an amount of work less than that of a reversible process

4

# Joule-Thomson co-efficient depends on the

Pressure

Temperature

Both (A) & (B)

Neither (A) nor (B)

4

# A gas can be liquefied by pressure alone only, when its temperature is __________ its critical temperature.

Less than

More than

Equal to or higher than

Less than or equal to

4

Superheated

Desuperheated

Non-condensable

None of these

4

Isothermally

Isobarically

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

Path

Point

State

None of these

4

Isolated

Open

Insulated

Closed

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

1.572

1.9398

3.389

4.238

4

# Work done in an adiabatic process between two states depends on the

Rate of heat transmission

Initial state only

End states only

None of these

4

P + F - C = 2

C = P - F + 2

F = C - P - 2

P = F - C - 2

4

Molecular size

Volume

Pressure

Temperature

4

Free energy

Entropy

Refractive index

None of these

4

Rectangle

Rhombus

Trapezoid

Circle

4

# Pick out the Clausius-Clapeyron equation from the following:

dP/dT = ΔH/TΔV

ln P = - (ΔH/RT) + constant

ΔF = ΔH + T [∂(ΔF)/∂T]P

None of these

4

He

N2

O2

H2

4

# Which of the following is not correct for a reversible adiabatic process?

TVγ-1 = constant

p1-γ.TY = constant

PVγ = constant

None of these

4

Conduction

Convection

Condensation

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

4

3

4

5

6

4

# On a P-V diagram of an ideal gas, suppose a reversible adiabatic line intersects a reversible isothermal line at point A. Then at a point A, the slope of the reversible adiabatic line (∂P/∂V)s and the slope of the reversible isothermal line (∂P/ ∂V)T are related as (where, y = Cp/Cv)

(∂P/∂V)S = (∂P/∂V)T

(∂P/∂V)S = [(∂P/∂V)T]Y

(∂P/∂V)S = y(∂P/∂V)T

(∂P/∂V)S = 1/y(∂P/∂V)T

4

# In any spontaneous process,

Only F decreases

Only A decreases

Both F and A decreases

Both F and A increase

4

# Which of the following equations is used for the prediction of activity co-efficient from experiments?

Van Laar equation

Margules equation

Wilson's equation

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

4

Volume

Density

Temperature

Pressure

4

V1/V2

V2/V1

V1 - V2

V1.V2

4

# The expression, nRT ln(P1/P2), is for the __________of an ideal gas.

Compressibility

Work done under isothermal condition

Co-efficient of thermal expansion

4

100,000 kW

160,000 kW

200,000 kW

320,000 kW