OCR GCSE Chemistry B Paper 4 2025 Question Paper

Download the official OCR GCSE (9–1) Chemistry B Twenty First Century Science J258/04 Depth in Chemistry Higher Tier June 2025 Question Paper PDF for the Summer 2025 examination series. This OCR examiner-set paper contains authentic GCSE Chemistry questions covering electrolysis, distillation, corrosion, the Haber process, atom economy, nanoparticles, neutralisation and energy changes.

The paper includes multiple-choice, graph-analysis, practical-method, calculation and extended-response questions on major OCR GCSE Chemistry topics including Group 1 reactions, ionic bonding, electrolysis of copper sulfate, water purification, chlorine treatment, corrosion resistance in steels, equilibrium, catalysts, percentage yield, methanol production, buckyballs, activation energy, exothermic and endothermic reactions, conservation of mass and acid concentration calculations. Students are also required to complete calculations involving atom economy, percentage yield, surface area to volume ratio, concentration, relative formula mass and hydrogen ion concentration.

Practical and analytical questions involve distillation of sea water, electrolysis experiments, neutralisation reactions, energy-change investigations and titration calculations. The paper also tests scientific reasoning, graph interpretation, industrial Chemistry analysis and evaluative skills required for OCR GCSE Chemistry examinations in 2026.

Perfect for GCSE Chemistry revision, timed mock exams, classroom assessment, higher-tier calculation practice and examiner-standard preparation. Best used together with the matching OCR J258/04 Mark Scheme for accurate self-assessment and OCR examiner feedback.

This document is designed for OCR GCSE (9–1) Chemistry B Twenty First Century 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, industrial Chemistry analysis and higher-tier calculations.