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Stoichiometry and Chemical Reactions
Practice Questions

20 CIE IGCSE Co-ordinated Science (Double Award) questions on Stoichiometry and Chemical Reactions, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Stoichiometry and Chemical Reactions

Question 1 · 1 mark · Difficulty 1/3

How many moles are present in 11 g of carbon dioxide, CO₂? (Relative atomic masses: C = 12, O = 16)

  1. A) 0.50 mol
  2. C) 0.25 mol
  3. D) 0.44 mol
  4. B) 4.00 mol
Show answer & explanation
✓ Answer: B — C) 0.25 mol
Molar mass of CO₂ = 12 + (2 × 16) = 44 g/mol. Moles = mass ÷ molar mass = 11 ÷ 44 = 0.25 mol. Option A uses a molar mass of 22, confusing CO₂ with a molar volume value. Option B inverts the calculation (44 ÷ 11). Option D confuses the number of grams with the number of moles and divides incorrectly.
Question 2 · 1 mark · Difficulty 1/3

Which statement correctly describes the term 'mole' as used in chemistry?

  1. B) The amount of substance containing 6.02 × 10²³ particles
  2. A) The mass in grams of one atom of an element
  3. C) The volume occupied by any gas at room temperature
  4. D) The relative mass of one molecule compared to carbon-12
Show answer & explanation
✓ Answer: A — B) The amount of substance containing 6.02 × 10²³ particles
A mole is defined as the amount of substance that contains 6.02 × 10²³ particles (Avogadro's number). Option A describes relative atomic mass, not the mole. Option C confuses the mole with molar volume, which is only constant under specified conditions. Option D describes relative molecular mass.
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20 questions · 25 min · free

CIE IGCSE Co-ordinated Science (Double Award): Stoichiometry and Chemical Reactions FAQ

How many CIE IGCSE Co-ordinated Science (Double Award) questions on Stoichiometry and Chemical Reactions are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Stoichiometry and Chemical Reactions for CIE IGCSE Co-ordinated Science (Double Award), 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 Co-ordinated Science (Double Award)?
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 and Chemical Reactions practice with other Co-ordinated Science (Double Award) 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 and Chemical Reactions questions aligned to the official CIE IGCSE Co-ordinated Science (Double Award) syllabus?
Every question is written against the published CIE IGCSE Co-ordinated Science (Double Award) 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 and Chemical Reactions typically tested on CIE IGCSE Co-ordinated Science (Double Award) papers?
Stoichiometry and Chemical Reactions appears across multiple question types on real CIE IGCSE Co-ordinated Science (Double Award) 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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