O Levels Chemistry (5070)•5070/12/M/J/19
Explanation
Catalysts in the Contact Process
Steps:
- Identify the role of vanadium(V) oxide (V₂O₅) as a catalyst in the oxidation of SO₂ to SO₃.
- Confirm statement 1: V₂O₅ is indeed the catalyst used.
- Confirm statement 3: Catalysts lower activation energy without being consumed, speeding up the reaction.
- Discard statements 2 and 4, as they misrepresent catalyst effects or process details.
Why D is correct:
- D selects 1 and 3 only, matching the true statements about V₂O₅ usage and its mechanism per catalysis definition.
Why the others are wrong:
- A includes incorrect statement 2 on catalyst altering equilibrium.
- B includes incorrect statements 2 and 4 on process conditions.
- C includes incorrect statement 4 on catalyst regeneration.
Final answer: D
Topic: Rate of reaction
Practice more O Levels Chemistry (5070) questions on mMCQ.me