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)

A. Heat absorbed

4

Ideal

Real

Isotonic

None of these

4

Minimum

Zero

Maximum

Indeterminate

4

# The most important application of distribution law is in

Evaporation

Liquid extraction

Drying

Distillation

4

Sublimation

Fusion

Transition

Vaporisation

4

Pressure

Volume

Mass

None of these

4

# What happens in a reversible adiabatic compression?

Heating occurs

Cooling occurs

Pressure is constant

Temperature is constant

4

# The partial pressure of each constituent present in an alloy is __________ the total vapor pressure exerted by the alloy.

Less than

Equal to

More than

Either (B) or (C); depends on the type of alloy

4

# Which of the following is an undesirable characteristic of a refrigerant?

It should be non-explosive

It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils

Its vapor pressure at the condenser temperature should be very high

None of these

4

6738.9

6753.5

7058.3

9000

4

ds = 0

ds <0

ds > 0

ds = Constant

4

# Kopp's rule is used to calculate the heat capacity of

Solids

Liquids

Gases

All (A), (B) & (C)

4

# Joule-Thomson co-efficient depends on the

Pressure

Temperature

Both (A) & (B)

Neither (A) nor (B)

4

ds = 0

ds < 0

ds > 0

ds = Constant

4

# Heat pump

Accomplishes only space heating in winter

Accomplishes only space cooling in summer

Accomplishes both (A) and (B)

Works on Carnot cycle

4

# Critical temperature is defined as the temperature above which a gas will

Not liquify (barring exceptions)

Immediately liquify

Never liquify however high the pressure may be

None of these

4

# Which of the following will increase the volume of a real gas by four times?

Doubling the absolute temperature as well as pressure of the gas

Reducing pressure to one fourth at constant temperature

Reducing temperature to one fourth at constant pressure

Reducing the temperature to half and doubling the pressure

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

Lowest

Highest

Average

None of these

4

-94 kcal

> -94 kcal

< - 94 kcal

Zero

4

# Boyle's law for gases states that

P ∝ 1/V, when temperature is constant

P ∝ 1/V, when temperature & mass of the gas remain constant

P ∝ V, at constant temperature & mass of the gas

P/V = constant, for any gas

4

# In the reaction, H2 +I2 2HI, addition of an inert gas will

Increase the partial pressure of H2

Increase the partial pressure of I2

Increase the total pressure and hence shift the equilibrium towards the right

Not affect the equilibrium conditions

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

0

1

2

3

4

# In case of vapour compression refrigeration system, elevating the evaporator temperature (keeping the condenser temperature constant) results in

Enhanced COP

Decreased COP

No change in the value of COP

Increased or decreased COP; depending upon the type of refrigerant

4

# A Carnot cycle consists of the following steps:

Two isothermal and two isentropic

Two isobaric and two isothermal

Two isochoric and two isobaric

Two isothermals and two isochoric

4

Less than

Same as

More than

Half

4

# Pick out the wrong statement.

System (of partially miscible liquid pairs), in which the mutual solubility increases with rise in temperature, are said to possess an upper consolute temperature

Systems, in which the mutual solubility increases with decrease in temperature, are said to possess lower consolute temperature

Nicotine-water system shows both an upper as well as a lower consolute temperature, implying that they are partially miscible between these two limiting temperatures

None of these

4

Cv.dT

Cp.dT

∫ Cp.dT

∫ Cv.dT

4

Zero

Unity

Infinity

None of these