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Rates of Chemical Reaction and Factors Affecting Them
Practice Questions

20 CXC CSEC Integrated Science questions on Rates of Chemical Reaction and Factors Affecting Them, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Rates of Chemical Reaction and Factors Affecting Them

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: C — Catalyst
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

A student in a Trinidad school investigated the reaction between marble chips and dilute hydrochloric acid. She measured the volume of gas produced every 30 seconds. Which factor would INCREASE the rate of this reaction?

  1. Using larger marble chips
  2. Using a lower concentration of acid
  3. Heating the acid before adding the marble chips
  4. Using less hydrochloric acid
Show answer & explanation
✓ Answer: C — Heating the acid before adding the marble chips
Award 1 mark for identifying that increasing temperature increases the rate of reaction by providing particles with more kinetic energy, leading to more frequent and energetic collisions. A is incorrect — larger chips have smaller surface area, slowing the reaction. B is incorrect — lower concentration means fewer acid particles to collide with marble. D is incorrect — using less acid does not increase the rate, only affects the total amount of product.
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20 questions · 25 min · free

CXC CSEC Integrated Science: Rates of Chemical Reaction and Factors Affecting Them FAQ

How many CXC CSEC Integrated Science questions on Rates of Chemical Reaction and Factors Affecting Them are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Rates of Chemical Reaction and Factors Affecting Them for CXC CSEC Integrated Science, 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 CXC 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 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 Rates of Chemical Reaction and Factors Affecting Them 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 Rates of Chemical Reaction and Factors Affecting Them 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 Rates of Chemical Reaction and Factors Affecting Them typically tested on CXC CSEC Integrated Science papers?
Rates of Chemical Reaction and Factors Affecting Them 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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