5070/42/M/J/20 · O Level Chemistry May/June 2020 Paper 42
5 questions, 60 marks. Each one links to its official mark scheme.
- Question 1 · 14 marks · Experimental design, The characteristic properties of acids and bases, Redox, Acid–base titrations, The mole and the Avogadro constant
- Question 2 · 10 marks · Identification of ions and gases
- Question 3 · 8 marks · Separation and purification, Chromatography
- Question 4 · 11 marks · Rate of reaction, Preparation of salts, Separation and purification, Experimental design
- Question 5 · 17 marks · Reactivity series, Exothermic and endothermic reactions, Rate of reaction, Experimental design, The mole and the Avogadro constant
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.