Spec H433
Free OCR B A Level Chemistry revision: past papers from 2017–2025 with mark schemes.
| Assessment | Format | Duration | Marks | Weighting |
|---|---|---|---|---|
| Paper 1 | Written exam | 2h 15m | 110 marks | 41% |
| Paper 2 | Written exam | 2h 15m | 100 marks | 37% |
| Paper 3 | Written exam | 1h 30m | 60 marks | 22% |
| Practical endorsement | Non-exam assessment | — | — | Pass/fail |
OCR B A Level Chemistry builds the skills examiners reward. By the end of the course you should be able to: