4

-2 RT ln 0.5

-RT ln 0.5

0.5 RT

2 RT

B. -RT ln 0.5

4

# Internal energy is equal to the heat absorbed in case of a/an __________ process.

Constant volume

Polytropic

Constant pressure

4

# Which of the following is Clausius-Clapeyron Equation for vaporisation of an ideal gas under the condition that the molar volume of liquid is negligible compared to that of the vapor?

d ln p/dt = Hvap/RT2

d ln p/dt = RT2/Hvap

dp/dt = RT2/Hvap

dp/dt = Hvap/RT2

4

0

1

2

3

4

H = E - PV

H = F - TS

H - E = PV

None of these

4

# As the time is passing, entropy of the universe

Is increasing

Is decreasing

Remain constant

Data insufficient, can't be predicted

4

Path

Point

State

None of these

4

# During Joule-Thomson expansion of gases

Enthalpy remains constant

Entropy remains constant

Temperature remains constant

None of these

4

Momentum

Mass

Energy

None of these

4

# Which of the following is an extensive property of a system?

Heat capacity

Molal heat capacity

Pressure

Concentration

4

Critical

Boyle

Inversion

Reduced

4

# Van Laar equation deals with the activity coefficients in

Binary solutions

Ternary solutions

Azeotropic mixture only

None of these

4

P1ACBP2P1

ACBB1A1A

ACBDA

4

T

T and P

T, P and Z

T and Z

4

# The extensive properties are

Volume, mass and number of moles

Free energy, entropy and enthalpy

Both (A) and (B)

None of these

4

Volume

Temperature

Pressure

None of these

4

# In the reaction; N2 + O2 2NO, increasing the pressure will result in

Shifting the equilibrium towards right

Shifting the equilibrium towards left

No change in equilibrium condition

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

# Pick out the correct statement:

In an isothermal system, irreversible work is more than reversible work

Under reversible conditions, the adiabatic work is less than isothermal work

Heat, work, enthalpy and entropy are all 'state functions'

Matter and energy cannot be exchanged with the surroundings in a closed system

4

# Law of corresponding states says that

Two different gases behave similarly, if their reduced properties (i.e. P, V and T) are same

The surface of separation (i. e. the meniscus) between liquid and vapour phase disappears at the critical temperature

No gas can be liquefied above the critical temperature, howsoever high the pressure may be.

The molar heat of energy of gas at constant volume should be nearly constant (about 3 calories)

4

# If two gases have same reduced temperature and reduced pressure, then they will have the same

Volume

Mass

Critical temperature

None of these

4

# The equation DU = Tds - PdV is applicable to infinitesimal changes occuring in

An open system of constant composition

A closed system of constant composition

An open system with changes in composition

A closed system with changes in composition

4

# Fugacity and pressure are numerically equal, when the gas is

In standard state

At high pressure

At low temperature

In ideal state

4

# The unit of equilibrium constant of a chemical reaction is the same as that of

Molar concentration

Temperature

Internal energy

None of these

4

2.73

28.3

273

283

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

Volume

Pressure

Temperature

All a, b & c

4

# At a given temperature, the volume of a gas dissolved in a solvent __________ with increase in pressure.

Increases

Decreases

Remains unchanged

May increase or decrease; depends on the gas

4

0.15

1.5

4.5

6.5

4

# Equation which relates pressure, volume and temperature of a gas is called the

Equation of state

Gibbs Duhem equation

Ideal gas equation

None of these