OCR As Level Chemistry A Paper 1 2025 Question Paper

Get the official OCR AS Level Chemistry A H032/01 Breadth in Chemistry June 2025 question paper used in the Summer 2025 OCR examination series. This authentic examiner-issued PDF contains multiple-choice, equilibrium, energetics, halogen chemistry, polymers, organic mechanisms, combustion, spectroscopy, and electrochemistry questions exactly as presented to candidates during the live OCR assessment.

This paper includes exam questions on percentage uncertainty in titrations, p-electron configurations, atom economy in iron extraction, oxidation numbers in sodium thiosulfate, molecular polarity, enthalpy changes of combustion, equilibrium and pressure effects, catalytic sustainability, alkene stereoisomerism, ozone depletion mechanisms, hydrolysis of haloalkanes, infrared spectroscopy interpretation, metallic bonding in magnesium, reaction rates with hydrochloric acid, halogen disproportionation, precipitation tests for halides, equilibrium constants (Kc), sulfur trioxide bond enthalpy calculations, polymerisation of 2-chloropropene, electrophilic addition mechanisms, oxidation of alcohols, and gas-volume calculations using the ideal gas equation. Candidates are required to complete quantitative calculations, draw mechanisms with curly arrows, analyse graphs, explain reaction trends, interpret IR spectra, and evaluate industrial and environmental chemistry processes. Pair it with the matching OCR H032/01 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 A students preparing for the 2026 examination series, Year 12 learners studying Breadth in Chemistry, retake students targeting top 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, spectroscopy interpretation, organic-mechanism revision, halogen-analysis training, and OCR exam-technique development.