5070Cambridge O Levels

Chemistry Past Papers

12 exam sessions — 2019 to 2025

Exam Tips for Chemistry

1Reactivity series (K Na Ca Mg Al Zn Fe Sn Pb Cu Hg Ag Au) — memorise it.
2Ionic equations: remove spectator ions; include state symbols (aq, s, l, g).
3Electrolysis: cathode = reduction (gains e⁻); anode = oxidation (loses e⁻).
4Moles: n = m/Mᵣ, n = cV, n = V/24 at RTP — know all three.
5Organic: write structural formulae for alkanes/alkenes; know addition vs substitution reactions.

Question Papers

Paper 1 Variant 1 — Question Paper Paper 1 Variant 2 — Question Paper Paper 1 Variant 3 — Question Paper Paper 2 Variant 1 — Question Paper Paper 2 Variant 2 — Question Paper Paper 2 Variant 3 — Question Paper Paper 4 Variant 1 — Question Paper Paper 4 Variant 2 — Question Paper Paper 4 Variant 3 — Question Paper

Mark Schemes

Paper 1 Variant 1 — Mark Scheme Paper 1 Variant 2 — Mark Scheme Paper 1 Variant 3 — Mark Scheme Paper 2 Variant 1 — Mark Scheme Paper 2 Variant 2 — Mark Scheme Paper 2 Variant 3 — Mark Scheme Paper 4 Variant 1 — Mark Scheme Paper 4 Variant 2 — Mark Scheme Paper 4 Variant 3 — Mark Scheme

Need to revise before attempting past papers?

Study Notes for Chemistry