4

# In the reaction, represented by, 2SO2 + O2 2SO3; ΔH = - 42 kcal; the forward reaction will be favoured by

Low temperature

High pressure

Both (A) and (B)

Neither (A) nor (B)

C. Both (A) and (B)

4

Momentum

Mass

Energy

None of these

4

dQ = dE + dW

dQ = dE - dW

dE = dQ + dW

dW = dQ + dE

4

# Entropy is a measure of the __________ of a system.

Disorder

Orderly behaviour

Temperature changes only

None of these

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

Pressure

Volume

Mass

None of these

4

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

Directly proportional

Inversely proportional

Equal

None of these

4

# __________ increases with increase in pressure.

The melting point of wax

The boiling point of a liquid

Both (A) and (B)

Neither (A) nor (B)

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

# Pick out the wrong statement.

Trouton's ratio of non-polar liquids is calculated using Kistyakowsky equation

Thermal efficiency of a Carnot engine is always less than 1

An equation relating pressure, volume and temperature of a gas is called ideal gas equation

None of these

4

# Which of the following is not an intensive property?

Chemical potential

Surface tension

Heat capacity

None of these

4

300 × (32/7)

300 × (33/5)

300 × (333/7)

300 × (35/7)

4

Increase

Decrease

No change

None of these

4

Solution

Vaporisation

Formation

Sublimation

4

Increase

Decrease

Not alter

None of these

4

# Boiling of liquid is accompanied with increase in the

Vapor pressure

Specific Gibbs free energy

Specific entropy

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

4

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

Co-efficient of thermal expansion

Compressibility

None of these

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

# Clausius-Clapeyron Equation gives accurate result, when the

Vapour pressure is relatively low and the temperature does not vary over wide limits

Vapour obeys the ideal gas law and the latent heat of vaporisation is constant

Volume in the liquid state is negligible compared with that in the vapour state

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

4

# For a constant volume process __________ by the system is used only to increase the internal energy.

Heat absorbed

Work done

Both (A) & (B)

Neither (A) nor (B)

4

35 K

174 K

274 K

154 K

4

Temperature

Specific heat

Volume

Pressure

4

# The principle applied in liquefaction of gases is

Joule-Thomson effect

Both (A) and (B)

Neither (A) nor (B)

4

None of these

4

Straight line

Sine curve

Parabola

Hyperbola

4

PV

2PV

PV/2

0

4

# Pick out the wrong statement.

Surface tension of a substance vanishes at critical point, as there is no distinction between liquid and vapour phases at its critical point

Entropy of a system decreases with the evolution of heat

Change of internal energy is negative for exothermic reactions

The eccentric factor for all materials is always more than one

4

Positive

Negative

Zero

Infinity

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

# For a multi-component system, the term chemical potential is equivalent to the

Molal concentration difference

Molar free energy

Partial molar free energy

Molar free energy change