5070/21/O/N/24 · O Level Chemistry October/November 2024 Paper 21
7 questions, 80 marks. Each one links to its official mark scheme.
- Question 1 · 7 marks · Atomic structure and the Periodic Table, Group I properties, Noble gases, Water, Ion and ionic bonds, Isotopes
- Question 2 · 15 marks · Redox, Extraction of metals, Exothermic and endothermic reactions, Transition elements, Reversible reactions and equilibrium, Formulae
- Question 3 · 6 marks · Electrolysis, Giant covalent structures
- Question 4 · 14 marks · Formulae, functional groups and terminology, Alkenes, Naming organic compounds, Fuels, Alkanes, Exothermic and endothermic reactions
- Question 5 · 14 marks · Formulae, Rate of reaction, The mole and the Avogadro constant, Identification of ions and gases, Redox, Preparation of salts
- Question 6 · 10 marks · Giant covalent structures, Simple molecules and covalent bonds, The mole and the Avogadro constant, Air quality and climate
- Question 7 · 14 marks · Naming organic compounds, The characteristic properties of acids and bases, Carboxylic acids, Solids, liquids and gases, Polymers
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.