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Molar volumes of gases and calculations involving gases
Practice Questions

20 CIE IGCSE Chemistry questions on Molar volumes of gases and calculations involving gases, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Molar volumes of gases and calculations involving gases

Question 1 · 1 mark · Difficulty 1/3

A student measured the volume of 0.500 mol of carbon dioxide gas at room temperature and pressure (r.t.p.). Which volume, in dm³, should the student have recorded?

  1. 12.0
  2. 24.0
  3. 48.0
  4. 6.0
Show answer & explanation
✓ Answer: A12.0
0 dm³). Award 1 mark for correct answer. At r.t.p., one mole of any gas occupies 24 dm³. Volume = 0.500 × 24 = 12.0 dm³. B is incorrect because 24.0 dm³ is the volume of 1.00 mol at r.t.p. C is incorrect because 48.0 dm³ would be the volume of 2.00 mol. D is incorrect because 6.0 dm³ would be the volume of 0.25 mol.
Question 2 · 1 mark · Difficulty 2/3

Methane burns in oxygen according to the equation: CH₄ + 2O₂ → CO₂ + 2H₂O. What volume of oxygen, in cm³, is required to completely burn 50 cm³ of methane? All volumes are measured at the same temperature and pressure.

  1. 25
  2. 50
  3. 100
  4. 150
Show answer & explanation
✓ Answer: C100
Award 1 mark for correct answer. The mole ratio of CH₄ : O₂ is 1 : 2. Since equal volumes of gases at the same temperature and pressure contain equal numbers of moles, the volume ratio is also 1 : 2. Therefore, 50 cm³ of CH₄ requires 2 × 50 = 100 cm³ of O₂. A is incorrect because this would be half the required volume. B is incorrect because this suggests a 1:1 ratio. D is incorrect because this is three times the methane volume.
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CIE IGCSE Chemistry: Molar volumes of gases and calculations involving gases FAQ

How many CIE IGCSE Chemistry questions on Molar volumes of gases and calculations involving gases are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Molar volumes of gases and calculations involving gases 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 Molar volumes of gases and calculations involving gases 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 Molar volumes of gases and calculations involving gases 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 Molar volumes of gases and calculations involving gases typically tested on CIE IGCSE Chemistry papers?
Molar volumes of gases and calculations involving gases 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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