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4.7.1 Crude oil, hydrocarbons and alkenes
Paper 2 · Higher combined
What you need to know
- (Key facts / definitions / equations for this spec point)
Support videos
- FreeScienceLessons (topic playlist): (use links below)
- PMT videos hub (Organic chemistry): https://www.physicsandmathstutor.com/chemistry-revision/gcse-aqa/organic-chemistry/
Self-assessment (checklist)
- I can state the purpose of cracking.
- I can describe the conditions used for catalytic cracking.
- I can describe the conditions used for steam cracking.
- I can give the products of cracking.
- I can describe how to test for alkenes, including the
Key steps (method)
- Identify what the question is testing (definition / calculation / explanation).
- Use the correct chemistry vocabulary and link cause → effect.
- If it’s a calculation: write the equation/formula first, then substitute carefully.
Common mistakes
- Giving a fact without linking it to the question.
- Missing units / state symbols when asked.
- Not showing enough working to score method marks.
Exam-style questions (quick)
- Define the key term(s) for this mini-topic.
- Explain a typical property/result using particle/bonding ideas.
- Do a short calculation or interpretation step relevant to this mini-topic.
Practice questions
- PMT: Organic chemistry (questions + notes): https://www.physicsandmathstutor.com/chemistry-revision/gcse-aqa/organic-chemistry/
Extra knowledge organisers
Revision links
- (Add links)