4

# For the gaseous phase chemical reaction, C2H4(g) + H2O(g) ↔ C2H5OH(g), the equilibrium conversion does not depend on the

Steam to ethylene ratio

Temperature

Pressure

None of these

D. None of these

4

Reversible

Irreversible

Isothermal

4

# __________ explains the equilibrium constant for any chemical reaction.

Henry's law

Law of mass action

Hess's law

None of these

4

Heat

Momentum

Energy

Work

4

# The internal energy of an incompressible fluid depends upon its

Pressure

Temperature

Both (A) & (B)

Neither (A) nor (B)

4

Critical

Boyle

Inversion

Reduced

4

# Claude's liquefaction process employs the cooling of gases by

Expansion in an engine

Following a constant pressure cycle

Throttling

None of these

4

2

0

3

1

4

# Maxwell's relation corresponding to the identity, dH = dS = Vdp + Σμi dni is

(∂T/∂V)S, ni = -(∂P/∂S)V, ni

(∂S/∂P)T, ni = (∂V/∂T)P, ni

(∂S/∂V)T, ni = (∂P/∂T)V, ni

(∂T/∂P)S, ni = (∂V/∂S)P, ni

4

# Third law of thermodynamics is helpful in

Prediction of the extent of a chemical reaction

Calculating absolute entropies of substances at different temperature

Evaluating entropy changes of chemical reaction

Both (B) and (C)

4

CO2

H2

O2

N2

4

# Internal energy change of a system over one complete cycle in a cyclic process is

Zero

+ve

-ve

Dependent on the path

4

# Water on heating from 1 to 4°C

Contracts

Expands

Has same volume

May contract or expand

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

100

50

205

200

4

# Equilibrium constant of a reaction varies with the

Initial concentration of the reactant

Pressure

Temperature

None of these

4

Non-uniformly

Isobarically

Isothermally

4

# The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.

Contracts

Expands

Does not change in volume

Either (A), (B) or (C)

4

Straight line

Sine curve

Parabola

Hyperbola

4

Cv.dT

Cp.dT

∫ Cp.dT

∫ Cv.dT

4

2.73

28.3

273

283

4

# Out of the following refrigeration cycles, which one has maximum COP?

Air cycle

Carnot cycle

Ordinary vapor compression cycle

Vapor compression with a reversible expansion engine

4

# Air-refrigeration cycle

Is the most efficient of all refrigeration cycles

Has very low efficiency

Requires relatively large quantities of air to achieve a significant amount of refrigeration

Both (B) and (C)

4

35 K

174 K

274 K

154 K

4

# For an exothermic reaction

Only enthalpy change (ΔH) is negative

Only internal energy change (ΔE) is negative

Both ΔH and ΔE are negative

Enthalpy change is zero

4

# The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture. This is

The statement as per Gibbs-Helmholtz

Called Lewis-Randall rule

Henry's law

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

Zero

Unity

Infinity

Negative

4

1

2

3

4

4

3

2

1

0