5070/21/O/N/21 · O Level Chemistry October/November 2021 Paper 21
10 questions, 85 marks. Each one links to its official mark scheme.
- Question 1 · 5 marks · Simple molecules and covalent bonds, Transition elements, Ion and ionic bonds, Extraction of metals, Air quality and climate
- Question 2 · 10 marks · Air quality and climate, Oxides, Separation and purification, Identification of ions and gases, Redox
- Question 3 · 11 marks · Rate of reaction, The mole and the Avogadro constant, Redox
- Question 4 · 7 marks · Alkenes, Alcohols, The mole and the Avogadro constant
- Question 5 · 7 marks · Redox, Exothermic and endothermic reactions, Identification of ions and gases, Metallic bonding, Reactivity series
- Question 6 · 5 marks · Exothermic and endothermic reactions, Group VII properties, Formulae
- Question 7 · 10 marks · Transition elements, Isotopes, Reactivity series, Reversible reactions and equilibrium
- Question 8 · 10 marks · Alkenes, Formulae, The characteristic properties of acids and bases, Polymers, Carboxylic acids, Alcohols
- Question 9 · 10 marks · Reversible reactions and equilibrium, The mole and the Avogadro constant, Electrolysis, Identification of ions and gases, Water
- Question 10 · 10 marks · Arrangement of elements, Solids, liquids and gases, Giant covalent structures, Simple molecules and covalent bonds, The mole and the Avogadro constant
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.