OCR GCSE Chemistry Paper 3 2025 Question Paper

Download the official OCR GCSE (9–1) Chemistry A Gateway Science J248/03 Paper 3 Higher Tier June 2025 Question Paper PDF for the Summer 2025 examination series. This OCR examiner-set paper contains authentic GCSE Chemistry questions covering structure and bonding, nanoparticles, chromatography, electrolysis, allotropes of carbon, rates of reaction, acids and titrations.

The paper includes multiple-choice, graph-analysis, practical-method, calculation and extended-response questions on major OCR GCSE Chemistry topics including ionic bonding, neutralisation, empirical formulae, electrolysis, covalent bonding, polymers, Rf values, nanoparticles, reaction profiles, isotopes, allotropes of carbon, graphite conductivity, chromatography, electroplating and pH calculations. Students are required to complete advanced calculations involving relative formula mass, surface area to volume ratio, Avogadro constant, molar calculations and acid concentration.

This June 2025 OCR Chemistry question paper also includes practical investigation questions involving magnesium and copper sulfate temperature-change experiments, calcium carbonate and nitric acid rate experiments, chromatography techniques and gas-volume measurements alongside higher-tier analytical questions designed to prepare students for OCR GCSE Chemistry examinations in 2026.

Perfect for GCSE Chemistry revision, timed mock exams, classroom assessment, practical-skills development and examiner-standard preparation. Best used together with the matching OCR J248/03 Mark Scheme for accurate self-assessment and OCR examiner feedback.

This document is designed for OCR GCSE (9–1) Chemistry A Gateway Science students preparing for the 2026 examination series, including Year 10 and Year 11 learners, tutors, teachers, revision centres, private candidates and home-school students studying Higher Tier Chemistry.

It is especially useful for students aiming to improve AO1 scientific knowledge, AO2 application skills and AO3 analytical and evaluative Chemistry skills using authentic OCR examination questions, advanced calculations and higher-tier practical investigations.