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Molar Volume and Calculations Involving Gases
Practice Questions

20 CXC CSEC Chemistry questions on Molar Volume and Calculations Involving Gases, 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 Molar Volume and Calculations Involving Gases.

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Question 1 · 1 mark · Difficulty 1/3

A student in a chemistry laboratory in Kingston, Jamaica measured the volume of hydrogen gas collected at room temperature and pressure (r.t.p.). What is the molar volume of ANY gas at r.t.p.?

  1. 22.4 dm³
  2. 24.0 dm³
  3. 12.0 dm³
  4. 44.8 dm³
Show answer & explanation
✓ Answer: B24.0 dm³
Award 1 mark for 24.0 dm³. This is the molar volume of any gas at room temperature and pressure (r.t.p., 25°C and 1 atm). A is incorrect — 22.4 dm³ is the molar volume at s.t.p. (0°C and 1 atm), not r.t.p. C is incorrect — this is half the correct value. D is incorrect — this is double the molar volume at s.t.p.
Question 2 · 1 mark · Difficulty 2/3

During the extraction of bauxite in Guyana, ammonia gas (NH₃) is sometimes released. Calculate the volume, in dm³, occupied by 0.5 moles of ammonia gas at r.t.p.

  1. 11.2 dm³
  2. 12.0 dm³
  3. 24.0 dm³
  4. 48.0 dm³
Show answer & explanation
✓ Answer: B12.0 dm³
Award 1 mark for 12.0 dm³. Calculation: Volume = moles × molar volume = 0.5 mol × 24.0 dm³/mol = 12.0 dm³. A is incorrect — uses s.t.p. molar volume (22.4 dm³) instead of r.t.p. C is incorrect — this is the volume of 1 mole, not 0.5 moles. D is incorrect — this is double the correct answer.
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CXC CSEC Chemistry: Molar Volume and Calculations Involving Gases FAQ

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