4

# A refrigeration cycle is the same as a __________ cycle,

Turbine

Heat engine

Reversed heat engine

None of these

C. Reversed heat engine

4

# Pick out the wrong statement.

The chemical potential of a pure substance depends upon the temperature and pressure

The chemical potential of a component in a system is directly proportional to the escaping tendency of that component

The chemical potential of ith species (μi) in an ideal gas mixture approaches zero as the pressure or mole fraction (xi) tends to be zero at constant temperature

The chemical potential of species 'i' in the mixture (μi) is mathematically represented as,μi = ∂(nG)/∂ni]T,P,nj where, n, ni and nj respectively denote the total number of moles, moles of ith species and all mole numbers except ith species. 'G' is Gibbs molar free energy

4

Momentum

Mass

Energy

None of these

4

# Which of the following non-flow reversible compression processes require maximum work?

Isothermal process

Isobaric process

All require same work

4

(T2 - T1)/T2

(T2 - T1)/T1

(T1 - T2)/T2

(T1 - T2)/T1

4

Volume

Pressure

Temperature

All a, b & c

4

3

4

5

6

4

# Trouton's ratio of __________ liquids is calculated using Kistyakowsky equation.

Polar

Non-polar

Both (A) & (B)

Neither (A) nor (B)

4

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

Pressure

Composition

Temperature

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

4

# Heat of reaction at constant volume is identified with __________ change.

Enthalpy

Internal energy

Either (A) or (B)

Neither (A) nor (B)

4

# Gibbs-Helmholtz equation is

ΔF = ΔH + T [∂(ΔF)/∂T]P

ΔF = ΔH - TΔT

d(E - TS) T, V < 0

dP/dT = ΔHvap/T.ΔVvap

4

Temperature

Mass

Volume

Pressure

4

F = A + PV

F = E + A

F = A - TS

F = A + TS

4

# Rotary lime kiln is an example of a/an __________ system.

Closed

Open

Isolated

Non-thermodynamic

4

# Which one is true for a throttling process?

A gas may have more than one inversion temperatures

The inversion temperature is different for different gases

The inversion temperature is same for all gases

The inversion temperature is the temperature at which Joule-Thomson co-efficient is infinity

4

# Dry ice is

Moisture free ice

Solid helium

Solid carbon dioxide

None of these

4

# Pick out the wrong statement

Phase rule variables are intensive properties

Heat and work are both state function

The work done by expansion of a gas in vacuum is zero

CP and CV are state function

4

# For organic compounds, group contribution method can be used for the estimation of

Critical properties

Specific gravity

Specific volume

Thermal conductivity

4

# In case of a close thermodynamic system, there is __________ across the boundaries.

No heat and mass transfer

No mass transfer but heat transfer

Mass and energy transfer

None of these

4

First law

Zeroth law

Third law

Second law

4

Isothermal

Isometric

None of these

4

Isometric

Polytropic

Isentropic

Isobaric

4

0.25

0.5

0.75

1

4

Less than

More than

Same as

Not related to

4

Saturated vapour

Solid

Gas

Liquid

4

# Internal energy is equal to the heat absorbed in case of a/an __________ process.

Constant volume

Polytropic

Constant pressure

4

# Enthalpy changes over a constant pressure path are always zero for __________ gas.

Any

A perfect

An easily liquefiable

A real

4

# Which of the following processes cannot be made reversible even under ideal condition of operation?

Free expansion of a gas

Compression of air in a compressor

Expansion of steam in a turbine

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

4

# Internal energy of an ideal gas

Increases with increase in pressure

Decreases with increase in temperature

Is independent of temperature

None of these

4

# Equation which relates pressure, volume and temperature of a gas is called the

Equation of state

Gibbs Duhem equation

Ideal gas equation

None of these