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: Gas chromatography separates based on
A) Solubility
B) Boiling point
C) Vapor pressure
D) Density
✅ Correct Answer: B
Explanation: Volatile compounds elute by boiling characteristics.
Q: Heat transfer by conduction is most efficient in
A) Vacuum
B) Gases
C) Solids
D) Liquids
✅ Correct Answer: C
Explanation: Because solids have closely packed molecules that transfer energy more effectively.
Q: Steam reforming primarily converts hydrocarbons into
A) Methanol
B) Hydrogen
C) Ethanol
D) Ammonia
✅ Correct Answer: B
Explanation: Steam reforming uses heat and steam to produce hydrogen from hydrocarbons like methane.
Q: Ideal gas law becomes inaccurate at
A) High pressure
B) Low temperature
C) Low pressure
D) High temperature
✅ Correct Answer: A
Explanation: At high pressures, gas molecules interact more, violating the ideal gas assumptions.
Q: The equipment used to dry heat-sensitive materials
A) Tray dryer
B) Rotary dryer
C) Freeze dryer
D) Spray dryer
✅ Correct Answer: C
Explanation: Freeze drying preserves material integrity by sublimating moisture at low temperatures.