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CIE · IGCSE · Chemistry

Stoichiometry
Practice Questions

115 CIE IGCSE Chemistry questions on Stoichiometry, 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 Stoichiometry.

Try 2 sample questions on Stoichiometry

Question 1 · 1 mark · Difficulty 1/3

What is the value of Avogadro's constant?

  1. 6.02 × 10²² per mole
  2. 6.02 × 10²³ per mole
  3. 6.02 × 10⁻²³ per mole
  4. 6.02 × 10²⁴ per mole
Show answer & explanation
✓ Answer: B6.02 × 10²³ per mole
02 × 10²³ per mole. Award 1 mark for correct identification of Avogadro's constant. C is incorrect — this is the reciprocal with wrong power. D is incorrect — the power is 23, not 24. A is incorrect — the power is 23, not 22.
Question 2 · 1 mark · Difficulty 1/3

Which of the following would cause the percentage yield of a reaction to be less than 100%?

  1. Using a catalyst
  2. Increasing the temperature
  3. Using excess reactant
  4. Loss of product during transfer
Show answer & explanation
✓ Answer: DLoss of product during transfer
Award 1 mark for identifying practical losses. C is incorrect — excess reactant does not reduce yield percentage. A is incorrect — catalysts increase rate but do not affect yield. B is incorrect — temperature changes may affect rate and equilibrium but loss during transfer is the direct cause of reduced yield.
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CIE IGCSE Chemistry: Stoichiometry FAQ

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 Stoichiometry 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 Stoichiometry 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 Stoichiometry typically tested on CIE IGCSE Chemistry papers?
Stoichiometry 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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