5070/42/O/N/21 · O Level Chemistry October/November 2021 Paper 42
6 questions, 60 marks. Each one links to its official mark scheme.
- Question 1 · 9 marks · Separation and purification, Alkanes, Experimental design, Fuels
- Question 2 · 9 marks · Identification of ions and gases, Properties of metals, Rate of reaction
- Question 3 · 7 marks · Identification of ions and gases
- Question 4 · 15 marks · Experimental design, Separation and purification, Redox, Acid–base titrations, The mole and the Avogadro constant
- Question 5 · 9 marks · Transition elements, Identification of ions and gases
- Question 6 · 11 marks · Experimental design, Exothermic and endothermic reactions, The characteristic properties of acids and bases, The mole and the Avogadro constant
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.