151. Rotary lime kiln is an example of a/an __________ system.
A. Closed
B. Open
C. Isolated
D. Non-thermodynamic
✅ The correct answer is option B.
Thermodynamics MCQs
152. For an ideal gas, the chemical potential is given by
A. RT dlnP
B. R dlnP
C. R dlnf
D. None of these
✅ The correct answer is option A.
153. A/an __________ system is exemplified by a vessel containing a volatile liquid in contact with its vapor.
A. Isolated
B. Closed
C. Open
D. None of these
✅ The correct answer is option C.
154. Which of the following is affected by the temperature?
A. Fugacity
B. Activity co-efficient
C. Free energy
D. All of the above
✅ The correct answer is option D.
155. In jet refrigerators, the refrigerating fluid is practically always
A. Water
B. Ammonia
C. Freon
D. Brine
✅ The correct answer is option A.
156. In a homogeneous solution, the fugacity of a component depends upon the
A. Pressure
B. Composition
C. Temperature
D. All of the above
✅ The correct answer is option D.
157. Entropy change for an irreversible isolated system is
A. ∞
B. 0
C. < 0
D. > 0
✅ The correct answer is option D.
158. Partial molal quantities are important in the study of
A. Ideal gases
B. Ideal solutions
C. Non-ideal mixtures
D. A pure component
✅ The correct answer is option C.
159. Entropy of a substance remains constant during a/an __________ change.
A. Reversible isothermal
B. Irreversible isothermal
C. Reversible adiabatic
D. None of these
✅ The correct answer is option C.
160. Gibbs-Duhem equation relates composition in liquid phase and the __________ at constant temperature & pressure.
A. Fugacity
B. Partial pressure
C. Activity co-efficient
D. A, B, and C
✅ The correct answer is option D.