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HomeCIE IGCSE ChemistryCarbon and carbon dioxide; carbonates
CIE · IGCSE · Chemistry

Carbon and carbon dioxide; carbonates
Practice Questions

20 CIE IGCSE Chemistry questions on Carbon and carbon dioxide; carbonates, each with instant feedback and a full examiner-style mark scheme.

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Question 1 · 1 mark · Difficulty 1/3

A student tested three white powders, X, Y and Z, by adding dilute hydrochloric acid to each. Only powder Y produced a gas that turned limewater milky. Which type of compound is powder Y?

  1. a metal oxide
  2. a metal carbonate
  3. a metal sulfate
  4. a metal hydroxide
Show answer & explanation
✓ Answer: Ba metal carbonate
Award 1 mark for identifying a metal carbonate. The gas that turns limewater milky is carbon dioxide, which is produced when carbonates react with acids. A is incorrect because metal oxides do not produce carbon dioxide with acids. C is incorrect because metal sulfates do not react with dilute acids to produce gas. D is incorrect because metal hydroxides do not produce carbon dioxide.
Question 2 · 1 mark · Difficulty 2/3

In an experiment, 10.0 g of calcium carbonate was heated strongly in a crucible until no further mass change occurred. The mass of solid remaining was 5.6 g. What is the percentage by mass of calcium oxide in the residue?

  1. 44%
  2. 56%
  3. 100%
  4. 180%
Show answer & explanation
✓ Answer: C100%
Award 1 mark for 100%. The residue is pure calcium oxide (CaCO₃ → CaO + CO₂). The 5.6 g is entirely calcium oxide. A is incorrect as it calculates the percentage mass loss. B confuses the mass of product with percentage composition. D incorrectly uses the original mass in the calculation.
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CIE IGCSE Chemistry: Carbon and carbon dioxide; carbonates FAQ

How many CIE IGCSE Chemistry questions on Carbon and carbon dioxide; carbonates are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Carbon and carbon dioxide; carbonates 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 Carbon and carbon dioxide; carbonates 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 Carbon and carbon dioxide; carbonates 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 Carbon and carbon dioxide; carbonates typically tested on CIE IGCSE Chemistry papers?
Carbon and carbon dioxide; carbonates 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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