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CXC · CSEC · Integrated Science

Chemical Reactions
Practice Questions

152 CXC CSEC Integrated Science questions on Chemical Reactions, 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 Chemical Reactions.

Try 2 sample questions on Chemical Reactions

Question 1 · 1 mark · Difficulty 1/3

In a Jamaican sugar factory, enzymes are used to speed up the breakdown of sucrose during processing. What term describes a substance that speeds up a chemical reaction without being used up?

  1. Reactant
  2. Product
  3. Catalyst
  4. Inhibitor
Show answer & explanation
✓ Answer: CCatalyst
Award 1 mark for correctly identifying the term catalyst. A is incorrect — reactants are substances that undergo chemical change. B is incorrect — products are substances formed in a reaction. D is incorrect — inhibitors slow down or prevent reactions.
Question 2 · 1 mark · Difficulty 1/3

Which of the following is the correct word equation for the reaction between hydrochloric acid and sodium hydroxide?

  1. Hydrochloric acid + sodium hydroxide → sodium chloride + hydrogen
  2. Hydrochloric acid + sodium hydroxide → sodium chloride + water
  3. Hydrochloric acid + sodium hydroxide → sodium hydride + water
  4. Hydrochloric acid + sodium hydroxide → sodium chlorate + water
Show answer & explanation
✓ Answer: BHydrochloric acid + sodium hydroxide → sodium chloride + water
Award 1 mark for correct word equation showing neutralisation producing sodium chloride (salt) and water. A is incorrect — hydrogen gas is produced when acids react with metals, not bases. C is incorrect — sodium hydride is not a product of neutralisation. D is incorrect — sodium chlorate is a different compound formed under different conditions.
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CXC CSEC Integrated Science: Chemical Reactions FAQ

Is Kramizo free for CXC CSEC students preparing for Integrated Science?
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 Chemical Reactions practice with other Integrated Science 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 Chemical Reactions questions aligned to the official CXC CSEC Integrated Science syllabus?
Every question is written against the published CXC CSEC Integrated Science 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 Chemical Reactions typically tested on CXC CSEC Integrated Science papers?
Chemical Reactions appears across multiple question types on real CXC CSEC Integrated Science 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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