OCR A Level Chemistry A Paper 2 2025 Question Paper

Get the official OCR A-Level Chemistry A H432/02 Synthesis and Analytical Techniques June 2025 question paper used in the Summer 2025 OCR examination series. This authentic examiner-issued PDF contains organic synthesis, polymers, aromatic chemistry, haloalkane mechanisms, spectroscopy, NMR, chromatography, carbonyl chemistry, and analytical-technique questions exactly as presented to candidates during the live OCR assessment.

This paper includes exam questions on E/Z stereoisomerism, incomplete combustion of hexane, electrophilic addition and substitution reactions, polymerisation of chlorinated monomers, biodegradable polymers, nucleophilic substitution of haloalkanes, bromination of benzene and phenol, nitration mechanisms using sulfuric acid catalysts, amino-acid TLC analysis, β-keto acid decomposition, esterification, NaBH4 reduction mechanisms, infrared spectroscopy, 13C NMR interpretation, mass spectra fragmentation, proton NMR analysis, and structural determination of unknown organic compounds. Candidates are required to complete multi-step synthesis plans, draw mechanisms with curly arrows, analyse chromatograms, interpret spectra, calculate Rf values, explain aromatic substitution, and determine unknown molecular structures from analytical data. Pair it with the matching OCR H432/02 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 A-Level Chemistry A students preparing for the 2026 examination series, Year 13 learners studying Synthesis and Analytical Techniques, 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, organic-synthesis planning, spectroscopy practice, mechanism revision, chromatography analysis, and OCR exam-technique development.