4

# The quantitative effect of temperature on chemical equilibrium is given by the

Vant-Hoff equation

Le-Chatelier's principle

Arrhenius equation

None of these

A. Vant-Hoff equation

4

# Compressibility factor-reduced pressure plot on reduced co-ordinates facilitates

Use of only one graph for all gases

Covering of wide range

Easier plotting

More accurate plotting

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

dE = Tds - PdV

dQ = CvdT + PdV

dQ = CpdT + Vdp

Tds = dE - PdV

4

# Clausius-Clapeyron equation is applicable to __________ equilibrium processes.

Solid-vapor

Solid-liquid

Liquid-vapor

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

4

T

√T

T2

1/√T

4

None of these

4

# Chemical potential is a/an

Extensive property

Intensive property

Force which drives the chemical system to equilibrium

Both (B) and (C)

4

Surface tension

Free energy

Specific heat

Refractive index

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

Negative

Zero

Infinity

None of these

4

# The main feature of Carnot refrigeration cycle is that, it

Does not need the addition of external work for its functioning

Transfers heat from high temperature to low temperature

Accomplishes the reverse effect of the heat engine

None of these

4

Path

Point

State

None of these

4

# Critical temperature is defined as the temperature above which a gas will

Not liquify (barring exceptions)

Immediately liquify

Never liquify however high the pressure may be

None of these

4

Entropy

Temperature

Enthalpy

Pressure

4

# Kopp's rule is used to calculate the heat capacity of

Solids

Liquids

Gases

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

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

# After throttling, gas temperature

Decreases

Increases

Remain same

May increase or decrease; depends on the nature of the gas

4

Water

Air

Evaporative

Gas

4

# Which of the following is not a unit of the equilibrium constant Kp? (where, Δx = number of moles of products number of moles of reactants)

(atm)Δx, when Δx is negative

(atm)Δx, when Δx is positive

Dimensionless, when Δx = 0

(atm)Δx2, when Δx > 0

4

Fusion

Vaporisation

Transition

None of these

4

# For an ideal gas, the enthalpy

Increases with rise in pressure

Decreases with rise in pressure

Is independent of pressure

Is a path function

4

Eutectic

Triple

Plait

Critical

4

Zero

Positive

Negative

None of these

4

0

+ve

-ve

4

Isothermal

Isobaric

Polytropic

4

Increase

Decrease

Not alter

None of these

4

# Reduced pressure of a gas is the ratio of its

Pressure to critical pressure

Critical pressure to pressure

Pressure to pseudocritical pressure

Pseudocritical pressure to pressure

4

# In Joule-Thomson porous plug experiment, the

Enthalpy does not remain constant

Entire apparatus is exposed to surroundings

Temperature remains constant

None of these

4

# The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition.

Internal energy

Enthalpy

Gibbs free energy

Helmholtz free energy

4

# A solute distributes itself between two nonmiscible solvents in contact with each other in such a way that, at a constant temperature, the ratio of its concentrations in two layers is constant, irrespective of its total amount. This is

The distribution law

Followed from Margules equation

A corollary of Henry's law

None of these