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OCR A-level Chemistry A H432 Paper 3: Unified chemistry

H432/03 · 1 hour 30 minutes · 70 marks · 26.0% of the A level.

What it examines

Content from all six teaching modules.

The shortest of the three written papers, at an hour and a half, and the one that draws on all six modules at once.

Read from Cambridge OCR Level 3 Advanced GCE in Chemistry A, H432, Specification, Version 3.1, May 2026, printed page 5 (page 11 of the PDF), retrieved 29 October 2026.

Where the library covers it

The units whose lessons teach the headings this paper examines, read off the route map, with how many of each unit’s lessons those headings name:

• Working in the laboratoryall 3 lessons
• Atomic structureall 4 lessons
• Amount of substanceall 5 lessons
• Bonding and structureall 5 lessons
• Energeticsall 4 lessons
• Kineticsall 3 lessons
• Chemical equilibriaall 3 lessons
• Redoxall 3 lessons
• Thermodynamicsall 3 lessons
• Rate equationsall 3 lessons
• Electrochemistryall 3 lessons
• Acids and basesall 4 lessons
• Periodicity and Period 32 of 3 lessons
• Group 2 and Group 7all 4 lessons
• Transition metalsall 5 lessons
• Ions in aqueous solution1 of 2 lessons
• Introduction to organic chemistryall 3 lessons
• Alkanes and halogenoalkanesall 4 lessons
• Alkenes and alcoholsall 4 lessons
• Organic analysisall 4 lessons
• Carbonyls and carboxylic acidsall 5 lessons
• Aromatic chemistry and aminesall 4 lessons
• Organic synthesisall 3 lessons

Where to get the papers

June 2025

• Question paper - Unified chemistry (H432/03), June 2025 Question paper
• Mark scheme - Unified chemistry (H432/03), June 2025 Mark scheme
• Examiners' report - Unified chemistry (H432/03), June 2025 Examiner report

June 2024

• Question paper - Unified chemistry (H432/03), June 2024 Question paper
• Mark scheme - Unified chemistry (H432/03), June 2024 Mark scheme
• Examiners' report - Unified chemistry (H432/03), June 2024 Examiner report

June 2023

• Question paper - Unified chemistry (H432/03), June 2023 Question paper
• Mark scheme - Unified chemistry (H432/03), June 2023 Mark scheme
• Examiners' report - Unified chemistry (H432/03), June 2023 Examiner report

June 2022

• Question paper - Unified chemistry (H432/03), June 2022 Question paper
• Mark scheme - Unified chemistry (H432/03), June 2022 Mark scheme
• Examiners' report - Unified chemistry (H432/03), June 2022 Examiner report

November 2021

• Question paper - Unified chemistry (H432/03), November 2021 Question paper
• Mark scheme - Unified chemistry (H432/03), November 2021 Mark scheme
• Examiners' report - Unified chemistry (H432/03), November 2021 Examiner report

November 2020

• Question paper - Unified chemistry (H432/03), November 2020 Question paper
• Mark scheme - Unified chemistry (H432/03), November 2020 Mark scheme
• Examiners' report - Unified chemistry (H432/03), November 2020 Examiner report

June 2019

• Question paper - Unified chemistry (H432/03), June 2019 Question paper
• Mark scheme - Unified chemistry (H432/03), June 2019 Mark scheme
• Examiners' report - Unified chemistry (H432/03), June 2019 Examiner report

June 2018

• Question paper - Unified chemistry (H432/03), June 2018 Question paper
• Mark scheme - Unified chemistry (H432/03), June 2018 Mark scheme
• Examiners' report - Unified chemistry (H432/03), June 2018 Examiner report

June 2017

• Question paper - Unified chemistry (H432/03), June 2017 Question paper
• Mark scheme - Unified chemistry (H432/03), June 2017 Mark scheme

OCR publishes the H432/03 papers it makes public on OCR’s assessment page for Chemistry A H032/H432, alongside the other papers in the qualification. The H432 past papers page lists what is published and when the list was checked.

Links were checked against the awarding bodies’ websites on 29 October 2026. InkChemistry does not host or reproduce past papers or mark schemes. If a direct link has moved, use the awarding body’s listing linked above.