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Separation techniques: filtration, crystallisation, distillation, chromatography
Practice Questions

20 CIE IGCSE Chemistry questions on Separation techniques: filtration, crystallisation, distillation, chromatography, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Separation techniques: filtration, crystallisation, distillation, chromatography

Question 1 · 1 mark · Difficulty 1/3

A mixture of sand and salt is added to water and stirred. Which separation technique should be used first to separate the sand from the salt solution?

  1. crystallisation
  2. filtration
  3. distillation
  4. chromatography
Show answer & explanation
✓ Answer: B — filtration
Award 1 mark for selecting filtration. Sand is insoluble and remains as residue when the salt solution passes through filter paper. A is incorrect — crystallisation is used after filtration to obtain salt crystals from solution. C is incorrect — distillation separates liquids or obtains solvent from solution. D is incorrect — chromatography separates dissolved substances based on different solubilities.
Question 2 · 1 mark · Difficulty 2/3

In fractional distillation of crude oil, fractions with lower boiling points are collected at the top of the fractionating column. Which statement explains why this occurs?

  1. Molecules with lower boiling points are smaller and rise faster
  2. Vapours with lower boiling points do not condense at higher temperatures
  3. Liquids with lower boiling points evaporate first and remain as vapours longer
  4. Compounds with lower boiling points have stronger intermolecular forces
Show answer & explanation
✓ Answer: B — Vapours with lower boiling points do not condense at higher temperatures
Award 1 mark for recognizing that low boiling point substances remain as vapours at temperatures where high boiling point substances condense. A is incorrect — molecular size affects boiling point but molecules do not 'rise faster'. C is partially correct but does not explain why they are collected at the top. D is incorrect — lower boiling points indicate weaker intermolecular forces.
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CIE IGCSE Chemistry: Separation techniques: filtration, crystallisation, distillation, chromatography FAQ

How many CIE IGCSE Chemistry questions on Separation techniques: filtration, crystallisation, distillation, chromatography are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Separation techniques: filtration, crystallisation, distillation, chromatography 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 Separation techniques: filtration, crystallisation, distillation, chromatography 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 Separation techniques: filtration, crystallisation, distillation, chromatography 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 Separation techniques: filtration, crystallisation, distillation, chromatography typically tested on CIE IGCSE Chemistry papers?
Separation techniques: filtration, crystallisation, distillation, chromatography 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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