4

RT d ln P

R d ln P

R d ln f

None of these

A. RT d ln P

4

P + F - C = 2

C = P - F + 2

F = C - P - 2

P = F - C - 2

4

# Third law of thermodynamics is concerned with the

Value of absolute entropy

Energy transfer

Direction of energy transfer

None of these

4

1

2

3

4

4

Enthalpy

Entropy

Pressure

None of these

4

+ve

0

-ve

4

0

273

25

None of these

4

3

4

5

6

4

# All gases above its inversion temperature, in a throttling process will show

A heating effect

No change in temperature

A cooling effect

Either (A) or (C)

4

A . x22

Ax1

Ax2

Ax12

4

# Standard temperature and pressure (S.T.P.) is

0°C and 750 mm Hg

15°C and 750 mm Hg

0°C and 1 kgf/cm2

15°C and 1 kgf/cm2

4

# Which of the following is not an intensive property?

Molar heat capacity

Internal energy

Viscosity

None of these

4

Stirling

Brayton

Rankine

None of these

4

# Thermal efficiency of a Carnot engine can approach 100%, only when the temperature of the

Cold reservoir approaches zero

Hot reservoir approaches infinity

Either (A) or (B)

Neither (A) nor (B)

4

# Fugacity co-efficient of a substance is the ratio of its fugacity to

Mole fraction

Activity

Pressure

Activity co-efficient

4

Straight line

Sine curve

Parabola

Hyperbola

4

Increase

Decrease

Not alter

None of these

4

# The equation, (d loge PA/d loge xA) = (d loge PA/d loge xB) applicable to a binary solution of components. A and B in equilibrium with their vapors at constant temperature and pressure is called the __________ equation.

Van Laar

Margules

Gibbs-Duhem

Gibbs-Duhem-Margules

4

Cv.dT

Cp.dT

∫ Cp.dT

∫ Cv.dT

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

4

-19.4

-30.2

55.2

-55.2

4

# Grams of butane (C4H10) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be

580

640

1160

Data insufficient; can't be computed

4

# Heat of formation of an element in its standard state is

0

< 0

> 0

A function of pressure

4

Temperature

Mass

Volume

Pressure

4

1

< 1

> 1

>> 1

4

n = y = 1.4

n = 0

n = 1

n = 1.66

4

# The chemical potential of a component (μi) of a phase is the amount by which its capacity for doing all work, barring work of expansion is increased per unit amount of substance added for an infinitesimal addition at constant temperature and pressure. It is given by

(∂E/∂ni)S, v, nj

(∂G/∂ni)T, P, nj = (∂A/∂ni) T, v, nj

(∂H/∂ni)S, P, nj

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

4

J/s

J.S

J/kmol

kmol/J

4

0

1

2

3

4

Zero

Unity

Infinity

None of these