The expression for entropy change given by, ΔS = - nR ln (P₂/P₁), holds good for

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The expression for entropy change given by, ΔS = - nR ln (P₂/P₁), holds good for

A. Expansion of a real gas

B. Reversible isothermal volume change

C. Heating of an ideal gas

D. Cooling of a real gas

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

A. Less than

B. Equal to

C. More than

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

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Degrees of freedom at triple point will be

A. 0

B. 1

C. 2

D. 3

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For a constant volume process

A. dE = C_pdT

B. dE = C_vdT

C. dQ = dE + pdV

D. dW = pdV

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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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Efficiency of a Carnot engine working between temperatures T₁ and T₂ (T₁ < T) is

A. (T₂ - T₁)/T₂

B. (T₂ - T₁)/T₁

C. (T₁ - T₂)/T₂

D. (T₁ - T₂)/T₁

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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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The third law of thermodynamics states that the

A. Heat capacity of a crystalline solid is zero at absolute zero temperature

B. Heat transfer from low temperature to high temperature source is not possible without external work

C. Gases having same reduced properties behaves similarly

D. None of these

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In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respectively, the Carnot COP will be

A. 5.2

B. 6.2

C. 0.168

D. Data insufficient, can't be found out

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Maxwell's relation corresponding to the identity, dH = dS = Vd_p + Σμ_i dn_i is

A. (∂T/∂V)_{S, ni} = -(∂P/∂S)_{V, ni}

B. (∂S/∂P)_{T, ni} = (∂V/∂T)_{P, ni}

C. (∂S/∂V)_{T, ni} = (∂P/∂T)_{V, ni}

D. (∂T/∂P)_{S, ni} = (∂V/∂S)_{P, ni}

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The reaction A (l) → R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The numbers of degrees of freedom are:

A. 1

B. 2

C. 3

D. 0

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The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.

A. Contracts

B. Expands

C. Does not change in volume

D. Either (A), (B) or (C)

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Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole.

A. 0

B. 273

C. 25

D. None of these

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Ideal gas law is applicable at

A. Low T, low P

B. High T, high P

C. Low T, high P

D. High T, low P

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During the phase transition, __________ changes.

A. Pressure

B. Volume

C. Temperature

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

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Which of the following behaves most closely like an ideal gas?

A. He

B. N₂

C. O₂

D. H₂

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The compressibility factor for an ideal gas is 1. Its value for any other real gas is

A. 1

B. < 1

C. > 1

D. Either (B) or (C), depends on the nature of the gas

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Pick out the wrong statement.

A. An ideal liquid or solid solution is defined as one in which each component obeys Raoult's law

B. If Raoult's law is applied to one component of a binary mixture; Henry's law or Raoult's law is applied to the other component also

C. Henry's law is rigorously correct in the limit of infinite dilution

D. None of these

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Joule-Thomson co-efficient for a perfect gas is

A. Zero

B. Positive

C. Negative

D. None of these

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The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.

A. Increases

B. Decreases

C. Remains unchanged

D. Decreases linearly

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The equation relating E, P, V and T which is true for all substances under all conditions is given by (∂E/∂V)_T = T(∂P/∂T)_H - P. This equation is called the

A. Maxwell's equation

B. Thermodynamic equation of state

C. Equation of state

D. Redlich-Kwong equation of state

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When dilute aqueous solutions of two salts are mixed, the process is associated with

A. Decrease in temperature

B. Increase in temperature

C. No change in temperature

D. Change in temperature which is a function of composition

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In case of the decomposition of hydroiodic acid (2HI H₂ + I₂), addition of H₂ (at equilibrium condition) will

A. Increase the partial pressure of I₂

B. Decrease the partial pressure of HI

C. Diminish the degree of dissociation of HI

D. None of these

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Dry ice is

A. Moisture free ice

B. Solid helium

C. Solid carbon dioxide

D. None of these

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The expression for entropy change given by, ΔS = nR ln (V₂/V₁) + nC_v ln (T₂/T₁) is valid for

A. Reversible isothermal volume change

B. Heating of a substance

C. Cooling of a substance

D. Simultaneous heating and expansion of an ideal gas

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Chemical potential of ith component of a system is given by

A. μ_i = (∂F/∂n_i)_{T, P, ni}

B. μ_i = (∂A/∂n_i)_{T, P, ni}

C. μ_i = (∂F/∂n_i)_{T, P}

D. μ_i = (∂A/∂n_i)_{T, P}

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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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The equation, C_p - C_v = R, is true for __________ gas.

A. No

B. Any real

C. Only ideal

D. Both (B) and (C)

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Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass?

A. dE = Tds - PdV

B. dQ = C_vdT + PdV

C. dQ = C_pdT + Vdp

D. Tds = dE - PdV

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What is the value of maximum COP in case of absorption refrigeration, if refrigeration provided is at temperature, T_R (where, T₁ and T₂ are source & surrounding temperatures respectively.)?

A. T_R/(T₂ - T_R) × (T₁ - T₂)/T₁

B. T_R/(T₂ - T_R) × T₁/(T₁ - T₂)

C. T_R/(T₁ - T_R) × (T₁ - T₂)/T₁

D. None of these

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Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor)?

A. Freon

B. Liquid sulphur dioxide

C. Methyl chloride

D. Ammonia

Discuss this answer

Accepted Answer

B. Reversible isothermal volume change

The expression for entropy change given by, ΔS = - nR ln (P₂/P₁), holds good for

Correct Answer :

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Related Questions

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

Degrees of freedom at triple point will be

For a constant volume process

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

Efficiency of a Carnot engine working between temperatures T₁ and T₂ (T₁ < T) is

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

The third law of thermodynamics states that the

In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respectively, the Carnot COP will be

Maxwell's relation corresponding to the identity, dH = dS = Vd_p + Σμ_i dn_i is

The reaction A (l) → R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The numbers of degrees of freedom are:

The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.

Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole.

Ideal gas law is applicable at

During the phase transition, __________ changes.

Which of the following behaves most closely like an ideal gas?

The compressibility factor for an ideal gas is 1. Its value for any other real gas is

Pick out the wrong statement.

Joule-Thomson co-efficient for a perfect gas is

The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.

The equation relating E, P, V and T which is true for all substances under all conditions is given by (∂E/∂V)_T = T(∂P/∂T)_H - P. This equation is called the

When dilute aqueous solutions of two salts are mixed, the process is associated with

In case of the decomposition of hydroiodic acid (2HI H₂ + I₂), addition of H₂ (at equilibrium condition) will

Dry ice is

The expression for entropy change given by, ΔS = nR ln (V₂/V₁) + nC_v ln (T₂/T₁) is valid for

Chemical potential of ith component of a system is given by

Throttling process is a/an __________ process.

The equation, C_p - C_v = R, is true for __________ gas.

Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass?

What is the value of maximum COP in case of absorption refrigeration, if refrigeration provided is at temperature, T_R (where, T₁ and T₂ are source & surrounding temperatures respectively.)?

Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor)?

Also checkout

The expression for entropy change given by, ΔS = - nR ln (P2/P1), holds good for

Correct Answer :

Show all Chemical Engineering Thermodynamics MCQ

Related Questions

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

Degrees of freedom at triple point will be

For a constant volume process

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

Efficiency of a Carnot engine working between temperatures T1 and T2 (T1 < T) is

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

The third law of thermodynamics states that the

In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respectively, the Carnot COP will be

Maxwell's relation corresponding to the identity, dH = dS = Vdp + Σμi dni is

The reaction A (l) → R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The numbers of degrees of freedom are:

The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.

Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole.

Ideal gas law is applicable at

During the phase transition, __________ changes.

Which of the following behaves most closely like an ideal gas?

The compressibility factor for an ideal gas is 1. Its value for any other real gas is

Pick out the wrong statement.

Joule-Thomson co-efficient for a perfect gas is

The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.

The equation relating E, P, V and T which is true for all substances under all conditions is given by (∂E/∂V)T = T(∂P/∂T)H - P. This equation is called the

When dilute aqueous solutions of two salts are mixed, the process is associated with

In case of the decomposition of hydroiodic acid (2HI H2 + I2), addition of H2 (at equilibrium condition) will

Dry ice is

The expression for entropy change given by, ΔS = nR ln (V2/V1) + nCv ln (T2/T1) is valid for

Chemical potential of ith component of a system is given by

Throttling process is a/an __________ process.

The equation, Cp - Cv = R, is true for __________ gas.

Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass?

What is the value of maximum COP in case of absorption refrigeration, if refrigeration provided is at temperature, TR (where, T1 and T2 are source & surrounding temperatures respectively.)?

Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor)?

Also checkout

The expression for entropy change given by, ΔS = - nR ln (P₂/P₁), holds good for

Efficiency of a Carnot engine working between temperatures T₁ and T₂ (T₁ < T) is

Maxwell's relation corresponding to the identity, dH = dS = Vd_p + Σμ_i dn_i is

The equation relating E, P, V and T which is true for all substances under all conditions is given by (∂E/∂V)_T = T(∂P/∂T)_H - P. This equation is called the

In case of the decomposition of hydroiodic acid (2HI H₂ + I₂), addition of H₂ (at equilibrium condition) will

The expression for entropy change given by, ΔS = nR ln (V₂/V₁) + nC_v ln (T₂/T₁) is valid for

The equation, C_p - C_v = R, is true for __________ gas.

What is the value of maximum COP in case of absorption refrigeration, if refrigeration provided is at temperature, T_R (where, T₁ and T₂ are source & surrounding temperatures respectively.)?