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WJEC · GCSE · Chemistry

Electrochemistry
Practice Questions

40 WJEC GCSE Chemistry questions on Electrochemistry, each with instant feedback and a full examiner-style mark scheme.

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✨ Revision guide includes key terms, worked examples and exam technique for Electrochemistry.

Try 2 sample questions on Electrochemistry

Question 1 · 1 mark · Difficulty 1/3

What is the OILRIG mnemonic for electrolysis?

  1. Oil refinement
  2. Oxidation Is Loss (of electrons), Reduction Is Gain (of electrons)
  3. Only ions lose reactivity in groups
  4. Nothing to do with chemistry
Show answer & explanation
✓ Answer: B — Oxidation Is Loss (of electrons), Reduction Is Gain (of electrons)
OILRIG helps remember: at the anode, ions are oxidised (lose electrons). At the cathode, ions are reduced (gain electrons).
Question 2 · 1 mark · Difficulty 1/3

Which statement best explains why solid sodium chloride does not conduct electricity?

  1. The ions are not free to move
  2. Sodium chloride is covalent
  3. The ions are too small
  4. Sodium chloride contains no electrons
Show answer & explanation
✓ Answer: A — The ions are not free to move
Award 1 mark for recognising that ions must be free to move to conduct electricity. B is incorrect — sodium chloride is ionic, not covalent. C is incorrect — ion size does not prevent conductivity if ions can move. D is incorrect — all matter contains electrons; the key is mobile charge carriers.
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20 questions · 25 min · free

WJEC GCSE Chemistry: Electrochemistry FAQ

Is Kramizo free for WJEC GCSE 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 Electrochemistry practice with other Chemistry topics or even switch to a totally different WJEC 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 Electrochemistry questions aligned to the official WJEC GCSE Chemistry syllabus?
Every question is written against the published WJEC GCSE Chemistry specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real WJEC 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 WJEC.
How is Electrochemistry typically tested on WJEC GCSE Chemistry papers?
Electrochemistry appears across multiple question types on real WJEC GCSE 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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