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: Laminar flow is usually assumed when Reynolds number is below
A) 1000
B) 3000
C) 2300
D) 2000
✅ Correct Answer: C
Explanation: For pipe flow, laminar conditions are defined for Re < 2300.
Q: The catalyst used in the Haber process
A) Vanadium pentoxide
B) Platinum
C) Iron
D) Nickel
✅ Correct Answer: C
Explanation: Finely divided iron is used in the Haber process to synthesize ammonia.
Q: The separation technique used for azeotropic mixtures
A) Flash distillation
B) Batch distillation
C) Extractive distillation
D) Simple distillation
✅ Correct Answer: C
Explanation: Extractive distillation uses an additional solvent to separate azeotropes.
Q: Chlor-alkali process primarily yields
A) NaCl and H₂O
B) NaOH and Cl₂
C) HCl and NaCl
D) H₂SO₄ and H₂
✅ Correct Answer: B
Explanation: This electrolysis of brine produces sodium hydroxide, chlorine gas, and hydrogen.