5070/22/M/J/25 · O Level Chemistry May/June 2025 Paper 22
8 questions, 80 marks. Each one links to its official mark scheme.
- Question 1 · 5 marks · Preparation of salts, Identification of ions and gases, Redox, Group VII properties
- Question 2 · 9 marks · Giant covalent structures, Electrolysis
- Question 3 · 9 marks · Alkenes, Exothermic and endothermic reactions, Simple molecules and covalent bonds
- Question 4 · 13 marks · Formulae, functional groups and terminology, Carboxylic acids, The mole and the Avogadro constant, Naming organic compounds
- Question 5 · 11 marks · Alkanes, Air quality and climate, Fuels, Formulae, Rate of reaction
- Question 6 · 16 marks · Solids, liquids and gases, The mole and the Avogadro constant, Redox, Reversible reactions and equilibrium
- Question 7 · 7 marks · Alloys and their properties, Corrosion of metals, Formulae
- Question 8 · 10 marks · Formulae, functional groups and terminology, Carboxylic acids, Polymers
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.