Paper 3 is synoptic — it tests your ability to link ideas across Physical, Inorganic, and Organic chemistry. Use this map to see how topics connect. Examiners reward candidates who can apply knowledge from one area to explain phenomena in another.
Module 2 — Foundations
Module 3 — Periodic Table & Energy
Module 4 — Core Organic
Module 5 — Physical & Transition
Module 6 — Organic & Analysis
Every required OCR A A-Level mechanism with step-by-step curly arrow descriptions, reagents/conditions, and common exam pitfalls. Click each mechanism to expand.
Key functional group interconversion routes required for OCR A A-Level. Master these to tackle any multi-step synthesis question. Each arrow shows the reagent, conditions, and reaction type.
Step-by-step templates for every common A-Level Chemistry calculation. Each framework gives you the formula, a worked example structure, and the mistakes that cost marks.
Rate your confidence on every OCR A Chemistry spec point. Your ratings are saved automatically. Use the Priority Revision List at the bottom to focus on high-weight weak areas.
Priority Revision List
Ranked by (exam weight) x (weakness rating). Red items need urgent attention.