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WJEC · GCSE · Chemistry

Rates of Reaction
Practice Questions

40 WJEC GCSE Chemistry questions on Rates of Reaction, 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 Rates of Reaction.

Try 2 sample questions on Rates of Reaction

Question 1 · 1 mark · Difficulty 1/3

What factors affect the rate of a chemical reaction?

  1. Only temperature
  2. Temperature, concentration, surface area, catalyst, pressure
  3. Only catalysts
  4. Only concentration
Show answer & explanation
✓ Answer: B — Temperature, concentration, surface area, catalyst, pressure
Rate of reaction is affected by temperature, concentration, surface area of solids, catalysts, and pressure (for gases). All relate to collision theory.
Question 2 · 1 mark · Difficulty 1/3

A catalyst is a substance that

  1. increases the rate of a chemical reaction and is used up in the process
  2. increases the rate of a chemical reaction without being chemically changed
  3. decreases the rate of a chemical reaction without being chemically changed
  4. increases the yield of products in a reversible reaction
Show answer & explanation
✓ Answer: B — increases the rate of a chemical reaction without being chemically changed
Award 1 mark for identifying that a catalyst speeds up reactions and remains unchanged. A is incorrect because catalysts are NOT used up. C is incorrect because catalysts increase, not decrease, reaction rates. D is incorrect because catalysts do not change the position of equilibrium or final yield.
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20 questions · 25 min · free

WJEC GCSE Chemistry: Rates of Reaction 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 Rates of Reaction 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 Rates of Reaction 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 Rates of Reaction typically tested on WJEC GCSE Chemistry papers?
Rates of Reaction 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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