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CXC · CSEC · Chemistry

Molar Volume of Gases and Gas Law Calculations
Practice Questions

20 CXC CSEC Chemistry questions on Molar Volume of Gases and Gas Law Calculations, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Molar Volume of Gases and Gas Law Calculations

Question 1 · 1 mark · Difficulty 1/3

A chemist at the Petrojam refinery in Jamaica measured the volume of nitrogen 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. 2.4 dm³
  4. 240 cm³
Show answer & explanation
✓ Answer: B24.0 dm³
0 dm³. Award 1 mark for B. At room temperature and pressure (r.t.p., 25°C and 1 atm), one mole of any gas occupies 24.0 dm³. 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 because it uses the wrong power of ten. D is incorrect — 240 cm³ is far too small and represents a conversion error.
Question 2 · 1 mark · Difficulty 2/3

A gas cylinder at a fire station in Kingston, Jamaica, contains oxygen at a pressure of 200 kPa and occupies a volume of 5.0 dm³. If the pressure is increased to 500 kPa at constant temperature, what is the new volume?

  1. 2.0 dm³
  2. 12.5 dm³
  3. 25.0 dm³
  4. 50.0 dm³
Show answer & explanation
✓ Answer: A2.0 dm³
0 dm³. Award 1 mark for A. Using Boyle's Law: P₁V₁ = P₂V₂. Therefore, 200 × 5.0 = 500 × V₂, so V₂ = (200 × 5.0) / 500 = 1000 / 500 = 2.0 dm³. B is incorrect — this results from dividing instead of multiplying correctly. C and D involve incorrect manipulation of the equation.
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CXC CSEC Chemistry: Molar Volume of Gases and Gas Law Calculations FAQ

How many CXC CSEC Chemistry questions on Molar Volume of Gases and Gas Law Calculations are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Molar Volume of Gases and Gas Law Calculations 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 of Gases and Gas Law Calculations 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 of Gases and Gas Law Calculations 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 of Gases and Gas Law Calculations typically tested on CXC CSEC Chemistry papers?
Molar Volume of Gases and Gas Law Calculations 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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