The main feature of Carnot refrigeration cycle is that, it

Question

The main feature of Carnot refrigeration cycle is that, it

A. Does not need the addition of external work for its functioning

B. Transfers heat from high temperature to low temperature

C. Accomplishes the reverse effect of the heat engine

D. None of these

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1st law of thermodynamics is nothing but the law of conservation of

A. Momentum

B. Mass

C. Energy

D. None of these

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The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the __________ equation.

A. Gibbs-Duhem

B. Van Laar

C. Gibbs-Helmholtz

D. Margules

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The expression, ΔG = nRT. ln(P₂/P₁), gives the free energy change

A. With pressure changes at constant temperature

B. Under reversible isothermal volume change

C. During heating of an ideal gas

D. During cooling of an ideal gas

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A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then (where, Δ S₁ and Δ S_R are the entropy changes of the system for the irreversible and reversible processes respectively)

A. Δ S₁ is always < Δ S_R

B. Δ S₁ is sometimes > Δ S_R

C. Δ S₁ is always > Δ S_R

D. Δ S₁ is always = Δ S_R

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Entropy is a measure of the __________ of a system.

A. Disorder

B. Orderly behaviour

C. Temperature changes only

D. None of these

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The chemical potential of any constituent of an ideal solution depends on the __________ of the solution.

A. Temperature

B. Pressure

C. Composition

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

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The efficiency of an Otto engine compared to that of a diesel engine, for the same compression ratio will be

A. More

B. Less

C. Same

D. Data insufficient to predict

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1m3 of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be

A. 35 K

B. 174 K

C. 274 K

D. 154 K

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Requisites of a reversible process is that the

A. System and surroundings pressure be equal

B. Friction in the system should be absent

C. System and surroundings temperature be equal

D. None of these

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Absorption/evolution of heat during conversion of a substance from one allotropic form to another is termed as the heat of

A. Sublimation

B. Fusion

C. Transition

D. Vaporisation

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Compressibility factor for almost all the gases are approximately same at the same

A. Pressure and temperature

B. Reduced pressure and reduced temperature

C. Critical pressure and critical temperature

D. None of these

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Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture __________ calorimeter is not used for measuring the dryness fraction of steam.

A. Bomb

B. Separating

C. Bucket

D. Throttling

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A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system

A. its internal energy (U) decreases and its entropy (S) increases

B. U and S both decreases

C. U decreases but S is constant

D. U is constant but S decreases

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For an ideal solution, the value of activity co-efficient is

A. 0

B. 1

C. < 1

D. > 1

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Entropy change in case of reversible adiabatic process is

A. Minimum

B. Zero

C. Maximum

D. Indeterminate

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In a homogeneous solution, the fugacity of a component depends upon the

A. Pressure

B. Composition

C. Temperature

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

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Sound waves propagation in air exemplifies an __________ process.

A. Adiabatic

B. Isothermal

C. Isometric

D. None of these

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

A. Zero

B. +ve

C. -ve

D. Dependent on the path

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

A. R log_e 4

B. R log₁₀ 4

C. C_v log₁₀ 4

D. C_v log_e 4

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Free energy

A. Decreases in all spontaneous (or irreversible) processes

B. Change during a spontaneous process has a negative value

C. Remains unchanged in reversible processes carried at constant temperature and pressure

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

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The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.

A. Kinematic viscosity

B. Work

C. Temperature

D. None of these

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Solid and liquid phases of a substance are in equilibrium at the

A. Critical temperature

B. Melting point

C. Freezing point

D. Both (B) and (C)

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The ratio of equilibrium constants (Kp2/Kp1) at two different temperatures is given by

A. (R/ΔH) (1/T₁ - 1/T₂)

B. (ΔH/R) (1/T₁ - 1/T₂)

C. (ΔH/R) (1/T₂ - 1/T₁)

D. (1/R) (1/T₁ - 1/T₂)

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Lenz's law results from the law of conservation of

A. Mass

B. Momentum

C. Energy

D. None of these

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If the heat of solution of an ideal gas in a liquid is negative, then its solubility at a given partial pressure varies with the temperature as

A. Solubility increases as temperature increases

B. Solubility increases as temperature decreases

C. Solubility is independent of temperature

D. Solubility increases or decreases with temperature depending on the Gibbs free energy change of solution

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An irreversible process

A. Is the analog of linear frictionless motion in machines

B. Is an idealised visualisation of behaviour of a system

C. Yields the maximum amount of work

D. Yields an amount of work less than that of a reversible process

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What happens in a reversible adiabatic expansion process?

A. Heating takes place

B. Cooling takes place

C. Pressure is constant

D. Temperature is constant

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If we increase the pressure on a substance (which is at its triple point), then the triple point

A. Increases

B. Decreases

C. Remains unchanged

D. May increase or decrease; depends on the substance

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A Carnot cycle consists of the following steps:

A. Two isothermal and two isentropic

B. Two isobaric and two isothermal

C. Two isochoric and two isobaric

D. Two isothermals and two isochoric

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For an ideal gas, the enthalpy

A. Increases with rise in pressure

B. Decreases with rise in pressure

C. Is independent of pressure

D. Is a path function

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Accepted Answer

C. Accomplishes the reverse effect of the heat engine

The main feature of Carnot refrigeration cycle is that, it

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

1st law of thermodynamics is nothing but the law of conservation of

The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the __________ equation.

The expression, ΔG = nRT. ln(P₂/P₁), gives the free energy change

A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then (where, Δ S₁ and Δ S_R are the entropy changes of the system for the irreversible and reversible processes respectively)

Entropy is a measure of the __________ of a system.

The chemical potential of any constituent of an ideal solution depends on the __________ of the solution.

The efficiency of an Otto engine compared to that of a diesel engine, for the same compression ratio will be

1m3 of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be

Requisites of a reversible process is that the

Absorption/evolution of heat during conversion of a substance from one allotropic form to another is termed as the heat of

Compressibility factor for almost all the gases are approximately same at the same

Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture __________ calorimeter is not used for measuring the dryness fraction of steam.

A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system

For an ideal solution, the value of activity co-efficient is

Entropy change in case of reversible adiabatic process is

In a homogeneous solution, the fugacity of a component depends upon the

Sound waves propagation in air exemplifies an __________ process.

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

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

Free energy

The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.

Solid and liquid phases of a substance are in equilibrium at the

The ratio of equilibrium constants (Kp2/Kp1) at two different temperatures is given by

Lenz's law results from the law of conservation of

If the heat of solution of an ideal gas in a liquid is negative, then its solubility at a given partial pressure varies with the temperature as

An irreversible process

What happens in a reversible adiabatic expansion process?

If we increase the pressure on a substance (which is at its triple point), then the triple point

A Carnot cycle consists of the following steps:

For an ideal gas, the enthalpy

Also checkout

The main feature of Carnot refrigeration cycle is that, it

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

1st law of thermodynamics is nothing but the law of conservation of

The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the __________ equation.

The expression, ΔG = nRT. ln(P2/P1), gives the free energy change

A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then (where, Δ S1 and Δ SR are the entropy changes of the system for the irreversible and reversible processes respectively)

Entropy is a measure of the __________ of a system.

The chemical potential of any constituent of an ideal solution depends on the __________ of the solution.

The efficiency of an Otto engine compared to that of a diesel engine, for the same compression ratio will be

1m3 of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be

Requisites of a reversible process is that the

Absorption/evolution of heat during conversion of a substance from one allotropic form to another is termed as the heat of

Compressibility factor for almost all the gases are approximately same at the same

Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture __________ calorimeter is not used for measuring the dryness fraction of steam.

A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system

For an ideal solution, the value of activity co-efficient is

Entropy change in case of reversible adiabatic process is

In a homogeneous solution, the fugacity of a component depends upon the

Sound waves propagation in air exemplifies an __________ process.

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

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

Free energy

The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.

Solid and liquid phases of a substance are in equilibrium at the

The ratio of equilibrium constants (Kp2/Kp1) at two different temperatures is given by

Lenz's law results from the law of conservation of

If the heat of solution of an ideal gas in a liquid is negative, then its solubility at a given partial pressure varies with the temperature as

An irreversible process

What happens in a reversible adiabatic expansion process?

If we increase the pressure on a substance (which is at its triple point), then the triple point

A Carnot cycle consists of the following steps:

For an ideal gas, the enthalpy

Also checkout

The expression, ΔG = nRT. ln(P₂/P₁), gives the free energy change

A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then (where, Δ S₁ and Δ S_R are the entropy changes of the system for the irreversible and reversible processes respectively)