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4

Clausius-Clapeyron equation is applicable to __________ equilibrium processes.

A. Solid-vapor

B. Solid-liquid

C. Liquid-vapor

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

Correct Answer :

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


Related Questions

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4

Throttling process is a/an __________ process.

A. Reversible and isothermal

B. Irreversible and constant enthalpy

C. Reversible and constant entropy

D. Reversible and constant enthalpy

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4

Gibbs free energy (F) is defined as

A. F = E - TS

B. F = H - TS

C. F = H + TS

D. F = E + TS

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4

The principle applied in liquefaction of gases is

A. Adiabatic expansion

B. Joule-Thomson effect

C. Both (A) and (B)

D. Neither (A) nor (B)

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4

What is the degree of freedom for two miscible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope?

A. 0

B. 1

C. 2

D. 3

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4

The absolute entropy for all crystalline substances at absolute zero temperature is

A. Zero

B. Negative

C. More than zero

D. Indeterminate

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4

First law of thermodynamics is mathematically stated as

A. dQ = dE + dW

B. dQ = dE - dW

C. dE = dQ + dW

D. dW = dQ + dE

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4

Which of the following equations is used for the prediction of activity co-efficient from experiments?

A. Van Laar equation

B. Margules equation

C. Wilson's equation

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

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4

For any system, what is the minimum number of degrees of freedom?

A. 0

B. 1

C. 2

D. 3

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4

When a gas is subjected to adiabatic expansion, it gets cooled due to

A. Decrease in velocity

B. Decrease in temperature

C. Decrease in kinetic energy

D. Energy spent in doing work

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4

Which of the following is true for Virial equation of state?

A. Virial co-efficients are universal constants

B. Virial co-efficients 'B' represents three body interactions

C. Virial co-efficients are function of temperature only

D. For some gases, Virial equations and ideal gas equations are the same

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4

Pick out the correct statement:

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

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

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

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

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4

Throttling (Joule-Thomson effect) process is a constant __________ process.

A. Enthalpy

B. Entropy

C. Pressure

D. None of these

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4

The expression, nRT ln(P1/P2), is for the __________of an ideal gas.

A. Compressibility

B. Work done under adiabatic condition

C. Work done under isothermal condition

D. Co-efficient of thermal expansion

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4

Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called __________ solutions.

A. Ideal

B. Real

C. Isotonic

D. None of these

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4

Heating of water under atmospheric pressure is an __________ process.

A. Isochoric

B. Isobaric

C. Adiabatic

D. Isothermal

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4

A system in which there is exchange of energy but not of mass, is called a/an __________ system.

A. Isolated

B. Open

C. Insulated

D. Closed

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4

Compressibility factor of a gas is

A. Not a function of its pressure

B. Not a function of its nature

C. Not a function of its temperature

D. Unity, if it follows PV = nRT

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4

At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero. This follows from the

A. Third law of thermodynamics

B. Second law of thermodynamics

C. Nernst heat theorem

D. Maxwell's relations

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4

The number of degrees of freedom for a mixture of ice and water (liquid) are

A. 3

B. 2

C. 1

D. 0

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4

Enthalpy 'H' is defined as

A. H = E - PV

B. H = F - TS

C. H - E = PV

D. None of these

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4

The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances. This is the

A. Lewis-Randall rule

B. Statement of Van't Hoff Equation

C. Le-Chatelier's principle

D. None of these

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4

For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system __________ as its mole fraction increases.

A. Decreases

B. Increases

C. Remain same

D. Decreases linearly

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4

What is the number of degrees of freedom for liquid water in equilibrium with a mixture of nitrogen and water vapor?

A. 2

B. 0

C. 3

D. 1

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4

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

A. Not liquify (barring exceptions)

B. Immediately liquify

C. Never liquify however high the pressure may be

D. None of these

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4

Melting of ice exemplifies a/an

A. Adiabatic process

B. Endothermic reaction

C. Exothermic reaction

D. Process involving a chemical reaction

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4

In the equation PVn = constant, if the value of n = y = Cp/Cv, then it represents a reversible __________ process.

A. Isothermal

B. Adiabatic

C. Isentropic

D. Polytropic

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4

The entropy change in a reversible isothermal process, when an ideal gas expands to four times its initial volume is

A. R loge 4

B. R log10 4

C. Cv log10 4

D. Cv loge 4

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4

The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called __________ temperature.

A. Boyle

B. Inversion

C. Critical

D. Reduced

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4

When a system is in equilibrium for all possible processes, the differential or finite change of entropy is

A. < 0

B. > 0

C. = 0

D. None of these

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4

Which is not a refrigerant?

A. SO2

B. NH3

C. CCl2F2

D. C2H4Cl2