9701/21/M/J/20 · Chemistry May/June 2020 Paper 21
6 questions, 60 marks. Each one links to its official mark scheme.
- Question 1 · 8 marks · Isotopes, Relative masses of atoms and molecules, Intermolecular forces, Covalent and dative bonding, Chemical periodicity of other elements
- Question 2 · 9 marks · Formulas, Oxidation numbers, Oxidation and reduction, Limiting reagents and stoichiometry
- Question 3 · 13 marks · Enthalpy change definitions, Hess’s law, Nitrogen and ammonia, Nitrogen oxides and pollution, Homogeneous and heterogeneous catalysts
- Question 4 · 6 marks · Brønsted–Lowry theory of acids and bases, Shapes of molecules
- Question 5 · 12 marks · Alkanes, Electrophilic addition, Carboxylic acids, Characteristic organic reactions, Reduction and nucleophilic addition, SN1 and SN2, Addition polymers and the bromine test
- Question 6 · 12 marks · Organic formulas and naming, Oxidising alkenes, Tests for carbonyls, Infrared spectroscopy, Carboxylic acids, Structural isomerism
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.