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The effect of changing conditions on equilibrium (Le Chatelier's principle)
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20 CIE IGCSE Chemistry questions on The effect of changing conditions on equilibrium (Le Chatelier's principle), each with instant feedback and a full examiner-style mark scheme.

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Question 1 · 1 mark · Difficulty 1/3

Le Chatelier's principle states that if a system at equilibrium is subjected to a change, the equilibrium will shift in order to:

  1. A: increase the rate of the forward reaction only
  2. B: oppose the effect of that change
  3. C: increase the concentration of all products
  4. D: favour the side with fewer moles of gas
Show answer & explanation
✓ Answer: B — B: oppose the effect of that change
Le Chatelier's principle states that a system at equilibrium will respond to a change by shifting to oppose that change and restore a new equilibrium. This does not always favour products or the side with fewer gas moles — it depends on the nature of the change applied.
Question 2 · 1 mark · Difficulty 2/3

Consider the equilibrium: N₂(g) + 3H₂(g) ⇌ 2NH₃(g). What is the effect of increasing pressure on this equilibrium?

  1. A: The equilibrium shifts left, producing more N₂ and H₂
  2. B: The equilibrium shifts right, producing more NH₃
  3. C: The equilibrium is unaffected because both sides contain gases
  4. D: The equilibrium shifts right, but the yield of NH₃ decreases
Show answer & explanation
✓ Answer: B — B: The equilibrium shifts right, producing more NH₃
The left side has 4 moles of gas (1 + 3) and the right side has 2 moles. Increasing pressure favours the side with fewer moles of gas, so the equilibrium shifts right, increasing the yield of NH₃. Option C is incorrect because the moles of gas are not equal on both sides.
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CIE IGCSE Chemistry: The effect of changing conditions on equilibrium (Le Chatelier's principle) FAQ

How many CIE IGCSE Chemistry questions on The effect of changing conditions on equilibrium (Le Chatelier's principle) are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on The effect of changing conditions on equilibrium (Le Chatelier's principle) 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 The effect of changing conditions on equilibrium (Le Chatelier's principle) 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 The effect of changing conditions on equilibrium (Le Chatelier's principle) 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 The effect of changing conditions on equilibrium (Le Chatelier's principle) typically tested on CIE IGCSE Chemistry papers?
The effect of changing conditions on equilibrium (Le Chatelier's principle) 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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