5070/42/O/N/20 · O Level Chemistry October/November 2020 Paper 42
6 questions, 60 marks. Each one links to its official mark scheme.
- Question 1 · 6 marks · Electrolysis, Identification of ions and gases
- Question 2 · 8 marks · Identification of ions and gases, Experimental design, Rate of reaction
- Question 3 · 15 marks · Experimental design, Acid–base titrations, The mole and the Avogadro constant
- Question 4 · 4 marks · Separation and purification
- Question 5 · 11 marks · Transition elements, Identification of ions and gases
- Question 6 · 16 marks · Exothermic and endothermic reactions, Experimental design, The mole and the Avogadro constant
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.