4

# Pick out the wrong statement.

The conversion for a gas phase reaction increases with decrease in pressure, if there is an increase in volume accompanying the reaction

With increase in temperature, the equilibrium constant increases for an exothermic reaction

The equilibrium constant of a reaction depends upon temperature only

The conversion for a gas phase reaction increases with increase in pressure, if there is a decrease in volume accompanying the reaction

B. With increase in temperature, the equilibrium constant increases for an exothermic reaction

4

Zero

One

Infinity

Negative

4

# Pick out the wrong statement.

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

4

# An isolated system can exchange __________ with its surroundings.

Matter

Energy

Neither matter nor energy

Both matter and energy

4

# Boiling of liquid is accompanied with increase in the

Vapor pressure

Specific Gibbs free energy

Specific entropy

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

4

# For a given substance at a specified temperature, activity is __________ to fugacity.

Directly proportional

Inversely proportional

Equal

None of these

4

# The equation, PV = nRT, is best obeyed by gases at

Low pressure & high temperature

High pressure & low temperature

Low pressure & low temperature

None of these

4

Pressure

Volume

Mass

None of these

4

# Which of the following is not an intensive property?

Chemical potential

Surface tension

Heat capacity

None of these

4

# Forward reaction will be favoured for the exothermic reaction, represented by CO + H2O CO2 + H2, by

Low temperature and high pressure

Low temperature and low pressure

High temperature and high pressure

High temperature and low pressure

4

3

1

2

0

4

# Mollier chart is a __________ plot.

Pressure vs. enthalpy

Pressure vs. volume

Enthalpy vs. entropy

Temperature vs. entropy

4

(dF)T, p <0

(dF)T, p = 0

(dF)T, p > 0

(dA)T, v >0

4

A = H - TS

A = E - TS

A = H + TS

None of these

4

# Entropy of the system decreases, when

Snow melts into water

A gas expands spontaneously from high pressure to low pressure

Water is converted into ice

Both (B) & (C)

4

Isothermally

Isobarically

None of these

4

# Compressibility factor of a gas is

Not a function of its pressure

Not a function of its nature

Not a function of its temperature

Unity, if it follows PV = nRT

4

Isothermal

Isometric

None of these

4

-94 kcal

> -94 kcal

< - 94 kcal

Zero

4

0

1

2

3

4

300 × (32/7)

300 × (33/5)

300 × (333/7)

300 × (35/7)

4

# The heat capacities for the ideal gas state depend upon the

Pressure

Temperature

Both (A) & (B)

Neither (A) nor (B)

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

# An ideal liquid refrigerant should

Not have a sub-atmospheric vapour pressure at the temperature in the refrigerator coils

Not have unduly high vapour pressure at the condenser temperature

Both (A) and (B)

Have low specific heat

4

# The ratio of equilibrium constants (Kp2/Kp1) at two different temperatures is given by

(R/ΔH) (1/T1 - 1/T2)

(ΔH/R) (1/T1 - 1/T2)

(ΔH/R) (1/T2 - 1/T1)

(1/R) (1/T1 - 1/T2)

4

# Pick out the wrong statement.

An ideal liquid or solid solution is defined as one in which each component obeys Raoult's law

If Raoult's law is applied to one component of a binary mixture; Henry's law or Raoult's law is applied to the other component also

Henry's law is rigorously correct in the limit of infinite dilution

None of these

4

0

2

1

3

4

# Tea kept in a thermos flask is vigorously shaken. If the tea is considered as a system, then its temperature will

Increase

Decrease

Remain unchanged

First fall and then rise

4

# The expression, nCv(T2 - T1), is for the __________ of an ideal gas.

Co-efficient of thermal expansion

Compressibility

None of these

4

# If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero

Enthalpy

Volume

Both 'a' & 'b'

Neither 'a' nor 'b'