OCR A Level Chemistry A Paper 1 2025 Question Paper

Get the official OCR A-Level Chemistry A H432/01 Periodic Table, Elements and Physical Chemistry June 2025 question paper used in the Summer 2025 OCR examination series. This authentic examiner-issued PDF contains periodicity, energetics, kinetics, equilibria, electrochemistry, entropy, transition-metal chemistry, acid-base, buffer, and redox questions exactly as presented to candidates during the live OCR assessment.

This paper includes exam questions on Born–Haber cycles, first ionisation energy trends, silicon and metallic bonding, halogen displacement reactions, molecular shapes of SiH4, PH3, and H2S, entropy and Gibbs free energy calculations, equilibrium constants (Kp), Arrhenius plots, heterogeneous catalysis, reaction orders and rate equations, buffer-solution calculations, electrode potentials, transition-metal complexes, stereoisomerism, and iodometric titration analysis involving copper(II) sulfate and iron(II) sulfate mixtures. Candidates are required to complete thermodynamic calculations, construct ionic equations, analyse equilibrium systems, determine activation energies from graphs, calculate buffer masses, deduce empirical formulae, and explain redox behaviour using electrode potentials. Pair it with the matching OCR H432/01 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 A-Level Chemistry A students preparing for the 2026 examination series, Year 13 learners studying Periodic Table, Elements and Physical Chemistry, 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, kinetics revision, electrochemistry analysis, thermodynamics training, and OCR exam-technique development.