5070/42/M/J/21 · O Level Chemistry May/June 2021 Paper 42
5 questions, 60 marks. Each one links to its official mark scheme.
- Question 1 · 12 marks · Experimental design, Preparation of salts, The mole and the Avogadro constant
- Question 2 · 12 marks · Identification of ions and gases
- Question 3 · 10 marks · Experimental design, Acid–base titrations, Preparation of salts
- Question 4 · 11 marks · Experimental design, Carboxylic acids, Separation and purification
- Question 5 · 15 marks · Experimental design, Identification of ions and gases, Rate of reaction, Reactivity series
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.