OCR As Level Chemistry B Paper 2 2025 Question Paper

Get the official OCR AS Level Chemistry B (Salters) H033/02 Chemistry in Depth June 2025 question paper used in the Summer 2025 OCR examination series. This authentic examiner-issued PDF contains catalysis, energetics, organic chemistry, Group 2 chemistry, equilibrium, spectroscopy, hydration reactions, electrochemistry, and practical-skills questions exactly as presented to candidates during the live OCR assessment.

This paper includes exam questions on catalytic converters and heterogeneous catalysis, energy profiles and Boltzmann distributions, industrial hydration of ethene, sulfuric-acid addition to alkenes, cyclopentene reaction mechanisms, hydrogenation catalysts, E/Z stereoisomerism in alkenes, Group 2 reactivity trends and ionisation enthalpies, hydrated magnesium sulfate experiments, oxidation of sodium sulfite to sodium sulfate, precipitation calculations using barium sulfate, anomalous graph points in hydrate experiments, isotope abundance calculations for magnesium, esterification of propanoic acid with propan-2-ol, equilibrium constants for esterification reactions, titration analysis, and temperature effects on equilibrium constants. Candidates are required to complete advanced calculations, construct ionic equations, draw curly-arrow mechanisms, analyse experimental data, plot graphs, evaluate practical methods, and explain thermodynamic and kinetic principles. Pair it with the matching OCR H033/02 June 2025 mark scheme on markscheme.net for complete examiner-style revision and exam preparation. Updated for the 2025/2026 academic year, mobile-friendly, and instantly downloadable from markscheme.net.

This document is designed for OCR AS Level Chemistry B (Salters) students preparing for the 2026 examination series, Year 12 learners studying Chemistry in Depth, retake students targeting A/A grades, and home-schooled candidates seeking authentic OCR exam practice under timed conditions.

It is also ideal for teachers, private tutors, revision-course providers, and parents supporting Chemistry revision at home. The question paper can be used for mock examinations, equilibrium-calculation practice, organic-mechanism revision, Group 2 chemistry analysis, graph plotting, titration calculations, and OCR exam-technique development.