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HomeAQA GCSE ChemistryThe rate and extent of chemical change: catalysts and their action
AQA · GCSE · Chemistry

The rate and extent of chemical change: catalysts and their action
Practice Questions

15 AQA GCSE Chemistry questions on The rate and extent of chemical change: catalysts and their action, each with instant feedback and a full examiner-style mark scheme.

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Question 1 · 1 mark · Difficulty 1/3

A catalyst is a substance that:

  1. Speeds up a reaction without being used up
  2. Slows reactions down
  3. Is used up in the reaction
  4. Changes the products
Show answer & explanation
✓ Answer: ASpeeds up a reaction without being used up
A catalyst increases the rate of reaction and is not used up, so it can be reused.
Question 2 · 1 mark · Difficulty 2/3

Catalysts in living organisms are called:

  1. Enzymes
  2. Hormones
  3. Substrates
  4. Vitamins
Show answer & explanation
✓ Answer: AEnzymes
Enzymes are biological catalysts that speed up reactions in living things.
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AQA GCSE Chemistry: The rate and extent of chemical change: catalysts and their action FAQ

How many AQA GCSE Chemistry questions on The rate and extent of chemical change: catalysts and their action are there on Kramizo?
Kramizo currently has 15 exam-board-aligned practice questions on The rate and extent of chemical change: catalysts and their action for AQA GCSE 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 AQA 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 AQA 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 The rate and extent of chemical change: catalysts and their action practice with other Chemistry topics or even switch to a totally different AQA 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 The rate and extent of chemical change: catalysts and their action questions aligned to the official AQA GCSE Chemistry syllabus?
Every question is written against the published AQA 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 AQA 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 AQA.
How is The rate and extent of chemical change: catalysts and their action typically tested on AQA GCSE Chemistry papers?
The rate and extent of chemical change: catalysts and their action appears across multiple question types on real AQA 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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