4

# Specific volume of an ideal gas is

Equal to its density

The reciprocal of its density

Proportional to pressure

None of these

B. The reciprocal of its density

4

T1/(T1-T2)

T2/(T1-T2)

T1/T2

T2/R1

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

0

< 0

> 0

4

1.572

1.9398

3.389

4.238

4

1

2

3

4

4

0

273

25

None of these

4

(T2 - T1)/T2

(T2 - T1)/T1

(T1 - T2)/T2

(T1 - T2)/T1

4

Isothermal

Isometric

None of these

4

CO2

H2

O2

N2

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

# Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are

Always greater than one

Same at the same reduced temperature

Same at the same reduced pressure

Both (B) & (C)

4

# Critical solution temperature (or the consolute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which

A homogeneous solution (say of phenol water) is formed

Mutual solubility of the two liquids shows a decreasing trend

Two liquids are completely separated into two layers

None of these

4

# Entropy, which is a measure of the disorder of a system, is:

Independent of pressure

Independent of temperature

Zero at absolute zero temperature for a perfect crystalline substance

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

4

0

1

2

3

4

# In an ideal gas mixture, fugacity of a species is equal to its

Vapor pressure

Partial pressure

Chemical potential

None of these

4

No

Any real

Only ideal

Both (B) and (C)

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

3

2

1

0

4

Water

Air

Evaporative

Gas

4

# Which of the following is not an equation of state?

Bertholet equation

Clausius-Clapeyron equation

Beattie-Bridgeman equation

None of these

4

# Boyle's law for gases states that

P ∝ 1/V, when temperature is constant

P ∝ 1/V, when temperature & mass of the gas remain constant

P ∝ V, at constant temperature & mass of the gas

P/V = constant, for any gas

4

# In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respectively, the Carnot COP will be

5.2

6.2

0.168

Data insufficient, can't be found out

4

# The equilibrium constant for a chemical reaction at two different temperatures is given by

Kp2/Kp1 = - (ΔH/R) (1/T2 - 1/T1)

Kp2/Kp1 = (ΔH/R) (1/T2 - 1/T1)

Kp2/Kp1 = ΔH (1/T2 - 1/T1)

Kp2/Kp1 = - (1/R) (1/T2 - 1/T1)

4

# dW and dq are not the exact differential, because q and W are

State functions

Path functions

Intensive properties

Extensive properties

4

# A solid is transformed into vapour without going to the liquid phase at

Triple point

Boiling point

Below triple point

Always

4

# If the heat of solution of an ideal gas in a liquid is negative, then its solubility at a given partial pressure varies with the temperature as

Solubility increases as temperature increases

Solubility increases as temperature decreases

Solubility is independent of temperature

Solubility increases or decreases with temperature depending on the Gibbs free energy change of solution

4

# Heat pump

Accomplishes only space heating in winter

Accomplishes only space cooling in summer

Accomplishes both (A) and (B)

Works on Carnot cycle

4

Fusion

Vaporisation

Transition

None of these

4

(∂E/∂T)V

(∂E/∂V)T

(∂E/∂P)V

(∂V/∂T)P