5070/21/M/J/20 · O Level Chemistry May/June 2020 Paper 21
10 questions, 85 marks. Each one links to its official mark scheme.
- Question 1 · 5 marks · Oxides, Simple molecules and covalent bonds, Giant covalent structures
- Question 2 · 8 marks · Reactivity series, Formulae, Redox, Extraction of metals
- Question 3 · 8 marks · Exothermic and endothermic reactions, Rate of reaction
- Question 4 · 12 marks · Formulae, functional groups and terminology, Solids, liquids and gases, Carboxylic acids, Rate of reaction, Reversible reactions and equilibrium
- Question 5 · 6 marks · The characteristic properties of acids and bases, The mole and the Avogadro constant
- Question 6 · 6 marks · Naming organic compounds, Formulae, functional groups and terminology, Carboxylic acids
- Question 7 · 10 marks · Air quality and climate, Alkanes, Alcohols, Solids, liquids and gases, Simple molecules and covalent bonds
- Question 8 · 10 marks · Atomic structure and the Periodic Table, Preparation of salts, Formulae, The mole and the Avogadro constant, Simple molecules and covalent bonds
- Question 9 · 10 marks · Transition elements, Redox, The mole and the Avogadro constant, Formulae, Identification of ions and gases
- Question 10 · 10 marks · Fuels, Formulae, functional groups and terminology, Alkanes, Alkenes, Naming organic compounds, Polymers
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.