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Oxidation and Reduction (Redox) Reactions
Practice Questions

20 CXC CSEC Chemistry questions on Oxidation and Reduction (Redox) Reactions, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Oxidation and Reduction (Redox) Reactions

Question 1 · 1 mark · Difficulty 1/3

During the industrial production of chlorine by electrolysis of brine in Trinidad, the half-equation at the anode is: 2Cl⁻ → Cl₂ + 2e⁻. Which statement correctly describes this process?

  1. Chloride ions are being reduced
  2. Chloride ions are being oxidised
  3. Chlorine molecules are being reduced
  4. Chlorine molecules are being oxidised
Show answer & explanation
✓ Answer: B — Chloride ions are being oxidised
Award 1 mark for recognising that chloride ions lose electrons, which is oxidation. A is incorrect because losing electrons is oxidation, not reduction. C and D are incorrect because the equation shows chloride ions being converted to chlorine molecules, not chlorine molecules undergoing change.
Question 2 · 1 mark · Difficulty 2/3

In the extraction of iron from its ore in a blast furnace, carbon monoxide acts as the reducing agent. Which statement correctly describes the role of carbon monoxide in this process?

  1. Carbon monoxide gains oxygen from iron(III) oxide
  2. Carbon monoxide loses electrons to iron(III) oxide
  3. Carbon monoxide gains electrons from iron(III) oxide
  4. Carbon monoxide donates electrons to iron ions
Show answer & explanation
✓ Answer: A — Carbon monoxide gains oxygen from iron(III) oxide
Award 1 mark for recognising that carbon monoxide removes oxygen from iron(III) oxide, thereby reducing it. B is incorrect because the reducing agent loses electrons, not the oxidising agent. C is incorrect because the reducing agent donates electrons, it does not gain them. D is incorrect because carbon monoxide removes oxygen rather than directly donating electrons to iron ions in this context.
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20 questions · 25 min · free

CXC CSEC Chemistry: Oxidation and Reduction (Redox) Reactions FAQ

How many CXC CSEC Chemistry questions on Oxidation and Reduction (Redox) Reactions are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Oxidation and Reduction (Redox) Reactions for CXC CSEC Chemistry, with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real CXC paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for CXC CSEC students preparing for Chemistry?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Oxidation and Reduction (Redox) Reactions practice with other Chemistry topics or even switch to a totally different CXC subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Oxidation and Reduction (Redox) Reactions questions aligned to the official CXC CSEC Chemistry syllabus?
Every question is written against the published CXC CSEC Chemistry specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CXC paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from CXC.
How is Oxidation and Reduction (Redox) Reactions typically tested on CXC CSEC Chemistry papers?
Oxidation and Reduction (Redox) Reactions appears across multiple question types on real CXC CSEC Chemistry papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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