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  1. GCSE
  3. Chemistry OCR

Chemistry

Spec J248

Free OCR GCSE Chemistry revision for Foundation and Higher tier: 1,984 exam-style questions, 115 worksheets, and past papers from 2018–2025 with mark schemes.

1 Particles

1.1 The particle model

1.2 Atomic structure

2 Elements, compounds and mixtures

2.1 Purity and separating mixtures

2.2 Bonding

2.3 Properties of materials

3 Chemical reactions

3.1 Introducing chemical reactions

3.2 Energetics

3.3 Types of chemical reactions

3.4 Electrolysis

4 Predicting and identifying reactions and products

4.1 Predicting chemical reactions

4.2 Identifying the products of chemical reactions

5 Monitoring and controlling chemical reactions

5.1 Monitoring chemical reactions

5.2 Controlling reactions

5.3 Equilibria

6 Global challenges

6.1 Improving processes and products

6.2 Organic chemistry

6.3 Interpreting and interacting with earth systems

Practical skills

Practical skills

Assessment at a glance

AssessmentFormatDurationMarksWeighting
Paper 1Written exam1h 45m90 marks50%
Paper 2Written exam1h 45m90 marks50%

Course aims & skills

OCR GCSE Chemistry builds the skills examiners reward. By the end of the course you should be able to:

  • recall scientific facts, terms, definitions and units
  • apply knowledge and understanding to unfamiliar situations
  • interpret, analyse and evaluate experimental data
  • plan investigations and evaluate methods and conclusions
  • carry out the required practicals and describe the techniques
  • use and rearrange equations, and work with significant figures
  • process data with appropriate maths skills
  • construct and read graphs, tables and diagrams
  • build and communicate evidence-based scientific arguments

Frequently Asked Questions