OCR GCSE Combined Science Chemistry, Foundation tier exam papers and weighting (J250)
Guide overview All topics Sample questions Papers and weighting Look inside Questions and answers
What each OCR GCSE Combined Science Chemistry, Foundation tier paper assesses
OCR GCSE Combined Science A (Gateway Science, specification J250) is worth two GCSEs and is examined by six papers, two for each science, each 1 hour 10 minutes and 60 marks. The chemistry content is sat as Paper 3 (Chemistry) and Paper 4 (Chemistry), together a third of the qualification. This is the Foundation tier, which sits its own pair of papers and offers grades 5–5 to 1–1 of the double award.
| Paper | Covers | Length | Marks | Weighting |
|---|---|---|---|---|
|
Paper 3 (Chemistry) Paper 3 (Chemistry) |
Chemical Reactions Elements, Compounds and Mixtures Particles Tests for oxygen, hydrogen, carbon dioxide and chlorine, from Predicting and Identifying Reactions |
1 hour 10 minutes | 60 marks | 16.7% |
|
Paper 4 (Chemistry) Paper 4 (Chemistry) |
Global Challenges Monitoring and Controlling Chemical Reactions Predicting and Identifying Reactions, apart from the gas tests |
1 hour 10 minutes | 60 marks | 16.7% |
Every topic, and where it is examined
| Topic | Examined on | Questions |
|---|---|---|
| Chemical Reactions | Paper 3 (Chemistry) | 193 |
| Elements, Compounds and Mixtures | Paper 3 (Chemistry) | 221 |
| Global Challenges | Paper 4 (Chemistry) | 165 |
| Monitoring and Controlling Chemical Reactions | Paper 4 (Chemistry) | 105 |
| Particles | Paper 3 (Chemistry) | 60 |
| Predicting and Identifying Reactions | 53 |
Assessment details from the OCR GCSE Combined Science A (Gateway Science) J250, version 5.0, May 2026. OCR specification.
Every paper is covered, because the guide runs the whole specification.Get the guide, £7
OCR GCSE Combined Science Chemistry, Foundation tier Active Recall Guide
797 questions across every paper on the specification.