strongly adsorbs and blocks active sites

Turnover frequency TOF measures

molecules converted per active site per time

enhances activity or selectivity of main catalyst

Heterogeneous catalyst is in

different phase than reactants usually solid

Catalysis and Reactor Design MCQs 2026

5 questions with detailed answers · 3 from past papers · 1 quiz batches available

📚 Chemical Engineering 📄 3 Past-Paper Qs ✓ Free · No Login Needed

🎯 Mock Test

Read each question, think about the answer, then click Show Answer to reveal the correct option and explanation. Load 10 at a time so it stays manageable — perfect for one-topic study sessions on the bus or during a break.

Page 1 of 1 Questions 1–10 of 5

Q1 Past Paper · PPSC/FPSC/CSS medium

Catalyst poison
1. A strongly adsorbs and blocks active sites
2. B always increases surface area beneficially
3. C is same as promoter
4. D only increases temperature
💡 Explanation:
Deactivation by impurities.
Q2 hard

Turnover frequency TOF measures
1. A only reactor volume
2. B only pump head
3. C only heat exchanger UA
4. D molecules converted per active site per time
💡 Explanation:
Intrinsic catalyst activity.
Q3 medium

Catalyst promoter
1. A poisons catalyst always
2. B enhances activity or selectivity of main catalyst
3. C replaces reactants
4. D is always the support only
💡 Explanation:
Promoters improve performance.
Q4 Past Paper · PPSC/FPSC/CSS easy

Heterogeneous catalyst is in
1. A same gas phase only always
2. B different phase than reactants usually solid
3. C always dissolved enzyme only
4. D always liquid fuel only
💡 Explanation:
Solid catalyst typical.
Q5 Past Paper · PPSC/FPSC/CSS medium

Zeolites used in catalysis due to
1. A only metallic conductivity
2. B only magnetic hysteresis
3. C shape selectivity and acidity
4. D only liquid viscosity
💡 Explanation:
Molecular sieve pores.

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Catalysis and Reactor Design MCQs 2026

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