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Le Chatelier's principle and factors affecting equilibrium
Practice Questions

20 CIE IGCSE Chemistry questions on Le Chatelier's principle and factors affecting equilibrium, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Le Chatelier's principle and factors affecting equilibrium

Question 1 · 1 mark · Difficulty 1/3

Which statement correctly describes Le Chatelier's principle?

  1. When a system at equilibrium is disturbed, the position of equilibrium shifts to oppose the change.
  2. When a system at equilibrium is disturbed, the equilibrium constant changes.
  3. When a system at equilibrium is disturbed, the forward reaction always increases.
  4. When a system at equilibrium is disturbed, the reaction stops until conditions return to normal.
Show answer & explanation
✓ Answer: A — When a system at equilibrium is disturbed, the position of equilibrium shifts to oppose the change.
Award 1 mark for identifying that equilibrium shifts to oppose/counteract the change. B is incorrect because the equilibrium constant only changes with temperature, not with all disturbances. C is incorrect because the shift depends on the type of disturbance. D is incorrect because the reaction continues but the rates of forward and reverse reactions change.
Question 2 · 1 mark · Difficulty 2/3

The Contact process is used to manufacture sulfuric acid. One stage involves the equilibrium: 2SO₂(g) + O₂(g) ⇌ 2SO₃(g) ΔH = −196 kJ/mol Industrial conditions typically use a temperature of 450°C and a pressure of 1–2 atm. Why is a temperature of 450°C used rather than a lower temperature?

  1. A lower temperature would shift equilibrium to the left.
  2. A lower temperature would cause the catalyst to become poisoned.
  3. A lower temperature would give an unacceptably slow rate of reaction.
  4. A lower temperature would decompose the sulfur trioxide formed.
Show answer & explanation
✓ Answer: C — A lower temperature would give an unacceptably slow rate of reaction.
Award 1 mark for identifying that lower temperatures give slower rates despite better equilibrium yield. A is incorrect because lower temperature actually favours the exothermic forward reaction. B is incorrect because temperature does not directly poison catalysts. D is incorrect because lower temperatures would not decompose the product.
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CIE IGCSE Chemistry: Le Chatelier's principle and factors affecting equilibrium FAQ

How many CIE IGCSE Chemistry questions on Le Chatelier's principle and factors affecting equilibrium are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Le Chatelier's principle and factors affecting equilibrium for CIE IGCSE 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 CIE 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 CIE IGCSE 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 Le Chatelier's principle and factors affecting equilibrium practice with other Chemistry topics or even switch to a totally different CIE 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 Le Chatelier's principle and factors affecting equilibrium questions aligned to the official CIE IGCSE Chemistry syllabus?
Every question is written against the published CIE IGCSE Chemistry specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CIE 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 CIE.
How is Le Chatelier's principle and factors affecting equilibrium typically tested on CIE IGCSE Chemistry papers?
Le Chatelier's principle and factors affecting equilibrium appears across multiple question types on real CIE IGCSE 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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