5070/42/M/J/25 · O Level Chemistry May/June 2025 Paper 42
4 questions, 40 marks. Each one links to its official mark scheme.
- Question 1 · 6 marks · Experimental design, Solids, liquids and gases
- Question 2 · 14 marks · Water, Acid–base titrations, The mole and the Avogadro constant, Experimental design
- Question 3 · 14 marks · Identification of ions and gases, The characteristic properties of acids and bases
- Question 4 · 6 marks · Preparation of salts
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.