# Practice Test: Question Set - 16

**1. (∂**

*T*/∂*P*)_{H}is the mathematical expression for- (A) Specific heat at constant pressure (

*C*)

_{p}- (B) Specific heat at constant volume (

*C*)

_{v}- (C) Joule-Thompson co-efficient

- (D) None of these

**2. Pick out the Clausius-Clapeyron equation from the following:**

- (A)

*dP*/

*dT*= ∆

*H*/

*T*∆

*V*

- (B) ln

*P*= - (∆

*H*/

*RT*) + constant

- (C) ∆

*F*= ∆

*H*+

*T*[∂(∆

*F*)/∂

*T*]

_{P}- (D) None of these

**3. 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

**4. 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

**5.**

*C*for an ideal gas_{v}- (A) Does not depend upon temperature

- (B) Is independent of pressure only

- (C) Is independent of volume only

- (D) Is independent of both pressure and volume

**6. Generation of heat by friction is an example of a/an __________ change.**

- (A) Isothermal

- (B) Irreversible

- (C) Adiabatic

- (D) Reversible

**7. The internal energy of an incompressible fluid depends upon its**

- (A) Pressure

- (B) Temperature

- (C) Both (a) & (b)

- (D) Neither (a) nor (b)

**8. The variation of heat of reaction with temperature at constant pressure is given by the __________ law.**

- (A) Kelvin's

- (B) Antoine’s

- (C) Kirchoff’s

- (D) None of these

**9. In a working refrigerator, the value of COP is always**

- (A) 0

- (B) < 0

- (C) < 1

- (D) > 1

**10. The unit of fugacity is the same as that of the**

- (A) Pressure

- (B) Temperature

- (C) Volume

- (D) Molar concentration

**11. Ideal refrigeration cycle is**

- (A) Same as Carnot cycle

- (B) Same as reverse Carnot cycle

- (C) Dependent on the refrigerant's properties

- (D) The least efficient of all refrigeration processes

**12. Variation of equilibrium pressure with temperature for any two phases of a given substances is given by the __________ equation.**

- (A) Gibbs-Duhem

- (B) Maxwell's

- (C) Clapeyron

- (D) None of these

**13. 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

**14. Entropy of an ideal gas depends upon its**

- (A) Pressure

- (B) Temperature

- (C) Both (a) & (b)

- (D) Neither (a) nor (b)

**15. An irreversible process**

- (A) Is the analog of linear frictionless motion in machines

- (B) Is an idealized visualization of behavior 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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