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Rates of Reaction and Factors Affecting Reaction Rate
Practice Questions

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

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Try 2 sample questions on Rates of Reaction and Factors Affecting Reaction Rate

Question 1 · 1 mark · Difficulty 1/3

A student in a Trinidad laboratory added zinc granules to dilute hydrochloric acid and measured the time taken to collect 50 cm³ of hydrogen gas. Which change would INCREASE the rate of this reaction?

  1. Using zinc powder instead of zinc granules
  2. Using a lower concentration of hydrochloric acid
  3. Cooling the reaction mixture in an ice bath
  4. Using a larger volume of the same concentration of acid
Show answer & explanation
✓ Answer: A — Using zinc powder instead of zinc granules
Award 1 mark for identifying that smaller particle size increases surface area, increasing the rate of reaction. B is incorrect — lower concentration means fewer acid particles per unit volume, decreasing collision frequency. C is incorrect — cooling decreases particle kinetic energy, reducing successful collisions. D is incorrect — increasing volume does not change concentration or surface area, so rate remains unchanged.
Question 2 · 1 mark · Difficulty 2/3

In the extraction of aluminium from bauxite in Guyana, the Bayer process operates at high temperatures. According to collision theory, why does increasing temperature increase the rate of reaction?

  1. Higher temperature increases the mass of reacting particles
  2. Higher temperature decreases the activation energy of the reaction
  3. Higher temperature increases the frequency and energy of collisions between particles
  4. Higher temperature increases the surface area of the reactants
Show answer & explanation
✓ Answer: C — Higher temperature increases the frequency and energy of collisions between particles
Award 1 mark for explaining that increased temperature gives particles more kinetic energy, resulting in more frequent collisions and a greater proportion of collisions exceeding activation energy. A is incorrect — mass of particles is unchanged. B is incorrect — temperature does not change activation energy (catalysts do). D is incorrect — temperature does not affect surface area.
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CXC CSEC Chemistry: Rates of Reaction and Factors Affecting Reaction Rate FAQ

How many CXC CSEC Chemistry questions on Rates of Reaction and Factors Affecting Reaction Rate are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Rates of Reaction and Factors Affecting Reaction Rate for CXC CSEC 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 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 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 and Factors Affecting Reaction Rate practice with other Chemistry 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 Reaction and Factors Affecting Reaction Rate questions aligned to the official CXC CSEC Chemistry syllabus?
Every question is written against the published CXC CSEC Chemistry 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 Reaction and Factors Affecting Reaction Rate typically tested on CXC CSEC Chemistry papers?
Rates of Reaction and Factors Affecting Reaction Rate appears across multiple question types on real CXC CSEC 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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