A. μ° + RT ln f
B. μ°+ R lnf
C. μ° + T lnf
D. μ° + R/T lnf
✅ The correct answer is option A.
Thermodynamics MCQs
12. Entropy change for an irreversible process taking system and surrounding together is
A. 0
B. > 0
C. < 0
D. None of these
✅ The correct answer is option B.
13. PVy = constant, holds good for an isentropic process, which is
A. Reversible and isothermal
B. Isothermal and irreversible
C. Reversible and adiabatic
D. Adiabatic and irreversible
✅ The correct answer is option C.
14. Isobaric process means a constant process.
A. Temperature
B. Pressure
C. Volume
D. Entropy
✅ The correct answer is option B.
15. Isentropic process means a constant __________ process.
A. Enthalpy
B. Pressure
C. Entropy
D. None of these
✅ The correct answer is option C.
16. The equation relating E, P, V and T which is true for all substanes under all conditions is given by (∂E/∂V)T = T.(∂P/∂T)H – P . This equation is called the
A. Maxwell
B. Thermodynamic equation of state
C. Equation of state
D. Redlich-Kwong equation of state
✅ The correct answer is option B.
17. For an isothermal reversible compression of an ideal gas
A. Only ΔE = 0
B. Only ΔH =0
C. ΔE = ΔH = 0
D. DQ = dE
✅ The correct answer is option C.
18. With increase in pressure (above atmospheric pressure), the Cp of a gas
A. Increases
B. Decreases
C. Remains unchanged
D. First decreases and then increases
✅ The correct answer is option A.
19. If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero.
A. Enthalpy
B. Volume
C. Both A & B
D. Neither A nor B
✅ The correct answer is option C.
20. (∂T/∂P)H is the mathematical expression for
A. Specific heat at constant pressure (Cp)
B. Specific heat at constant volume (Cv)
C. Joule-Thompson co-efficient
D. None of these
✅ The correct answer is option C.