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HomeCIE IGCSE ChemistryCracking of hydrocarbons
CIE · IGCSE · Chemistry

Cracking of hydrocarbons
Practice Questions

20 CIE IGCSE Chemistry questions on Cracking of hydrocarbons, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Cracking of hydrocarbons

Question 1 · 1 mark · Difficulty 1/3

Which statement correctly describes the products of cracking?

  1. Only alkanes are produced
  2. Only alkenes are produced
  3. A mixture of alkanes and alkenes is produced
  4. A mixture of alkanes and alcohols is produced
Show answer & explanation
✓ Answer: CA mixture of alkanes and alkenes is produced
Award 1 mark for identifying that cracking produces a mixture of alkanes and alkenes. A is incorrect — alkenes are also produced. B is incorrect — at least one alkane is typically produced alongside alkenes. D is incorrect — alcohols are not direct products of cracking hydrocarbons.
Question 2 · 1 mark · Difficulty 1/3

What is the purpose of cracking hydrocarbons in the petrochemical industry?

  1. To convert long-chain alkanes into shorter, more useful molecules
  2. To combine small molecules into larger polymers
  3. To remove sulfur impurities from crude oil fractions
  4. To separate crude oil into different fractions
Show answer & explanation
✓ Answer: ATo convert long-chain alkanes into shorter, more useful molecules
Award 1 mark for identifying that cracking converts long-chain alkanes into shorter, more useful molecules. B is incorrect — this describes polymerisation, not cracking. C is incorrect — sulfur removal is desulfurisation. D is incorrect — separation of crude oil is fractional distillation, not cracking.
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CIE IGCSE Chemistry: Cracking of hydrocarbons FAQ

How many CIE IGCSE Chemistry questions on Cracking of hydrocarbons are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Cracking of hydrocarbons 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 Cracking of hydrocarbons 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 Cracking of hydrocarbons 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 Cracking of hydrocarbons typically tested on CIE IGCSE Chemistry papers?
Cracking of hydrocarbons 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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