2025 - 2026 Edexcel IAL Past Papers

Every Edexcel International A Level Biology and Chemistry past paper in one place: Units 1 to 6 (WBI11–WBI16 and WCH11–WCH16) for the January, June and October sittings from 2019 to 2026, each with its question paper, mark scheme and examiner report.

Use them the way the top students do. Sit the paper in exam time with no notes, then mark it strictly against the mark scheme. Edexcel only awards a point when the exact key term or working is on the page, so write down every phrase you missed. Keep a running list of the questions you lost marks on and redo those by topic a week later; that is where the fastest gains come from. Then read the examiner report for the session you just sat: it names the mistakes most candidates made, and they repeat year after year.

• Biology: Unit 1 Molecules, Diet, Transport and Health · Unit 2 Cells, Development, Biodiversity and Conservation · Unit 3 Practical Skills I · Unit 4 Energy, Environment, Microbiology and Immunity · Unit 5 Respiration, Internal Environment, Coordination and Gene Technology · Unit 6 Practical Skills II
• Chemistry: Unit 1 Structure, Bonding and Introduction to Organic Chemistry · Unit 2 Energetics, Group Chemistry, Halogenoalkanes and Alcohols · Unit 3 Practical Skills I · Unit 4 Rates, Equilibria and Further Organic Chemistry · Unit 5 Transition Metals and Organic Nitrogen Chemistry · Unit 6 Practical Skills II

If you want the answers written out in full mark-scheme language, the solved IAL past papers show every question answered the way the examiner wants, and the specification checklists tell you which topic each question is testing.