Pearson Edexcel As Chemistry Paper 2 2025 Question Paper

Download the official Pearson Edexcel AS Level Chemistry Paper 2 question paper for the June 2025 examination series (8CH0/02). This examiner-authentic PDF contains the complete Core Organic and Physical Chemistry assessment used in the live Edexcel AS Chemistry examination.

The paper examines key AS Chemistry topics including alkenes, alcohols, combustion, enthalpy changes, infrared spectroscopy, mass spectrometry, organic synthesis, nucleophilic substitution, elimination reactions, catalysts, equilibrium, Maxwell–Boltzmann distributions, and Hess cycles. Students are required to apply theoretical chemistry knowledge to calculations, practical procedures, reaction mechanisms, analytical techniques, and structured scientific explanations.

Questions assess understanding of skeletal formulae, IUPAC naming, bromine addition reactions, E/Z isomerism, oxidation of alcohols, combustion calorimetry, intermolecular forces, boiling-temperature trends, fragmentation patterns in mass spectrometry, infrared absorption peaks, heterogeneous catalysis, equilibrium constants, and enthalpy cycles for combustion and formation reactions.

The examination includes structured calculations involving enthalpy changes of combustion, percentage yield, equilibrium expressions, industrial catalyst productivity, Hess-cycle calculations, and stoichiometric calculations using sodium dichromate(VI), phosphorus triiodide, and butan-2-ol reactions. Students must demonstrate accurate working, correct units, balanced equations, and logical scientific reasoning under authentic Edexcel exam conditions.

Practical and analytical contexts include calorimetry experiments using octan-1-ol, preparation and purification of butanone, distillation methods, infrared spectroscopy analysis of carboxylic acids, oxidation procedures using sodium dichromate(VI), industrial methanol production, catalytic converters in vehicle exhaust systems, and Maxwell–Boltzmann energy distributions.

Extended-response questions require students to describe detailed laboratory procedures for producing pure, dry butanone from butan-2-ol, including apparatus selection, purification steps, and distillation methods. Students are also required to analyse industrial equilibrium conditions for methanol manufacture using temperature, pressure, catalysts, and collision theory.

The paper also explores industrial chemistry concepts such as heterogeneous catalysts, steam reforming of methane, catalytic converters, equilibrium shifts, activation energy, and the economic considerations involved in choosing industrial reaction conditions.

This official Edexcel AS Chemistry 8CH0/02 question paper is ideal for timed exam practice, mock examinations, revision planning, classroom assessment, independent study, and preparation for the 2026 AS Chemistry examinations. Pair this paper with the matching Edexcel 8CH0/02 mark scheme on markscheme.net for complete examiner-standard revision and accurate self-assessment.

This document is designed for Pearson Edexcel AS Level Chemistry students studying the 8CH0 specification, especially Year 12 students preparing for the 2026 examination series who want authentic exam practice using official Edexcel assessment materials. It is particularly useful for students aiming to improve calculation accuracy, reaction-mechanism drawing, analytical reasoning, laboratory-method understanding, and application of chemistry theory to practical and industrial contexts.

The paper is also highly valuable for Chemistry teachers, tutors, sixth-form colleges, revision centres, home-schooled learners, and retake candidates who require official Edexcel exam-standard materials for mock examinations, classroom activities, structured revision sessions, homework tasks, and exam-technique preparation. It supports stronger understanding of organic chemistry, thermochemistry, analytical chemistry, industrial chemistry, and practical laboratory procedures.