Chemical Engineering Thermodynamics Numerical MCQ Test - Set 29 - ObjectiveBooks
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Chemical Engineering Thermodynamics Numerical MCQ Test - Set 29

Practice Test: Question Set - 29

1. For a constant pressure reversible process, the enthalpy change (ΔH) of the system is
    (A) Cv.dT
    (B) Cp.dT
    (C) ∫ Cp.dT
    (D) ∫ Cv.dT

2. Heat is added at constant pressure in an ideal __________ cycle.
    (A) Stirling
    (B) Brayton
    (C) Rankine
    (D) Both (b) and (c)

3. Work done is a
    (A) Property of the system
    (B) Path function
    (C) Point function
    (D) State description of a system

4. For the reversible exothermic reaction, N2 + 3H2  2NH3, increase of pressure would
    (A) Shift the equilibrium towards right
    (B) Give higher yield of NH3
    (C) Both (b) and (c)
    (D) Neither (a) nor (b)

5. Co-efficient of performance for a reversed Carnot cycle working between temperatures T1 and T2 (T1 > T2) is
    (A) T2/(T1 - T2)
    (B) T1/(T1 - T2)
    (C) (T1 - T2)/T1
    (D) (T1 - T2)/T2

6. The free energy change for a chemical reaction is given by (where, K = equilibrium constant)
    (A) RT ln K
    (B) -RT ln K
    (C) -R ln K
    (D) T ln K

7. After throttling, gas temperature
    (A) Decreases
    (B) Increases
    (C) Remain same
    (D) May increase or decrease; depends on the nature of the gas

8. For a real gas, the chemical potential is given by
    (A) RT d ln P
    (B) RT d ln f
    (C) R d ln f
    (D) None of these

9. If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will
    (A) Increase
    (B) Decrease
    (C) Remain unaltered
    (D) Increase or decrease; depends on the particular reaction

10. Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is
    (A) 1
    (B) 2
    (C) 3
    (D) 4

11. The thermodynamic law, PVy = constant, is not applicable in case of
    (A) Ideal compression of air
    (B) Free expansion of an ideal gas
    (C) Adiabatic expansion of steam in a turbine
    (D) Adiabatic compression of a perfect gas

12. The expression for entropy change, ΔS = n Cp . ln (T2/T1), is valid for the __________ of a substance.
    (A) Simultaneous pressure & temperature change
    (B) Heating
    (C) Cooling
    (D) Both (b) and (c)

13. For an ideal gas, the chemical potential is given by
    (A) RT d ln P
    (B) R d ln P
    (C) R d ln f
    (D) None of these

14. Which of the following diagrams does not represent an Otto cycle?

15. Internal energy is equal to the heat absorbed in case of a/an __________ process.
    (A) Constant volume
    (B) Polytropic
    (C) Adiabatic
    (D) Constant pressure

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