Chemical Engineering MCQs
Chemical Engineering MCQs cover process calculations, heat/mass transfer, reaction engineering, plant design, safety, and environment, helping FPSC, PPSC, NTS candidates and graduates strengthen concepts, match exam trends, and prepare for competitive tests and chemical industry careers.
Q: Minimum boiling azeotropes
A) Separate easily
B) Boil at high temp
C) Boil at constant temp
D) Are unstable
✅ Correct Answer: C
Explanation: Maintain fixed composition when boiling.
Q: Joule-Thomson effect occurs during
A) Combustion
B) Expansion
C) Cooling
D) Compression
✅ Correct Answer: B
Explanation: Cooling during expansion without heat exchange.
Q: Chemical potential relates to
A) Mass transfer
B) Phase equilibrium
C) Diffusion
D) Kinetics
✅ Correct Answer: B
Explanation: Governs component behavior across phases.
Q: Mass transfer in gases mainly by
A) Convection
B) Conduction
C) Diffusion
D) Radiation
✅ Correct Answer: C
Explanation: Molecules spread out via diffusion.
Q: Reverse osmosis is used for
A) Sterilization
B) Desalination
C) Filtration
D) Absorption
✅ Correct Answer: B
Explanation: Forces water through membranes to remove salt.