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HomeCIE IGCSE ChemistryElectrochemistry — electrode products and half-equations
CIE · IGCSE · Chemistry

Electrochemistry — electrode products and half-equations
Practice Questions

20 CIE IGCSE Chemistry questions on Electrochemistry — electrode products and half-equations, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Electrochemistry — electrode products and half-equations

Question 1 · 1 mark · Difficulty 1/3

During the electrolysis of concentrated aqueous sodium chloride, what is produced at the negative electrode (cathode)?

  1. Sodium metal
  2. Hydrogen gas
  3. Chlorine gas
  4. Oxygen gas
Show answer & explanation
✓ Answer: BHydrogen gas
Award 1 mark for identifying hydrogen. A is incorrect — sodium ions are present but hydrogen ions are preferentially discharged because hydrogen is lower in the reactivity series than sodium. C is incorrect — chlorine is produced at the positive electrode (anode). D is incorrect — oxygen would be produced at the anode from dilute solutions, not at the cathode.
Question 2 · 1 mark · Difficulty 2/3

In the industrial extraction of aluminium by electrolysis of molten aluminium oxide, cryolite is added to the electrolyte. What is the main purpose of adding cryolite?

  1. To increase the conductivity of the electrolyte
  2. To lower the melting point of aluminium oxide
  3. To prevent the oxidation of the carbon anodes
  4. To increase the purity of the aluminium produced
Show answer & explanation
✓ Answer: BTo lower the melting point of aluminium oxide
Award 1 mark for identifying the purpose of cryolite. Aluminium oxide has a very high melting point (about 2050°C), and cryolite reduces this to approximately 950°C, making the process more economical. A is incorrect — while cryolite does conduct electricity, its main purpose is to reduce the melting point. C is incorrect — cryolite does not prevent anode oxidation. D is incorrect — cryolite does not affect the purity of the aluminium.
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CIE IGCSE Chemistry: Electrochemistry — electrode products and half-equations FAQ

How many CIE IGCSE Chemistry questions on Electrochemistry — electrode products and half-equations are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Electrochemistry — electrode products and half-equations for CIE IGCSE 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 CIE 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 CIE IGCSE 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 — electrode products and half-equations practice with other Chemistry topics or even switch to a totally different CIE 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 — electrode products and half-equations questions aligned to the official CIE IGCSE Chemistry syllabus?
Every question is written against the published CIE IGCSE Chemistry specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CIE 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 CIE.
How is Electrochemistry — electrode products and half-equations typically tested on CIE IGCSE Chemistry papers?
Electrochemistry — electrode products and half-equations appears across multiple question types on real CIE IGCSE 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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