2025 OCR GCSE Chemistry A Higher Tier PAPER 3 J248/03

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OCR GCSE Chemistry A (Higher Tier) – Paper 3 (J248/03) – 2025

This paper assesses students’ understanding of the core and intermediate chemistry concepts in the OCR GCSE Chemistry A (9–1) specification, with an emphasis on application, calculation, and scientific reasoning at Higher Tier level.

Paper 3 examines content from the earlier topics of the specification, including:

Atomic structure and the periodic table – subatomic particles, electronic structure, trends, and properties of elements
Bonding, structure, and properties of matter – ionic, covalent, and metallic bonding, and material properties
Quantitative chemistry – moles, equations, mass calculations, concentrations, and gas volumes
Chemical changes – acids, alkalis, salts, electrolysis, and reactivity series
Energy changes – exothermic and endothermic reactions and reaction profiles

The exam includes a range of multiple-choice questions, short-answer questions, calculations, data analysis, practical-based questions, and extended responses, testing students’ ability to apply chemical knowledge to both familiar and unfamiliar contexts.

This resource is ideal for revision, mock exams, classroom teaching, and independent study, helping students improve exam technique and develop confidence with higher-tier chemistry questions