9701/21/O/N/21 · Chemistry October/November 2021 Paper 21
4 questions, 60 marks. Each one links to its official mark scheme.
- Question 1 · 21 marks · Structure and properties, Dot-and-cross diagrams, Shapes of molecules, Intermolecular forces, Enthalpy change definitions, Hess’s law, Brønsted–Lowry theory of acids and bases, Acids and bases, Oxidation and reduction, Gas volumes, Nitrogen oxides and pollution, Formulas
- Question 2 · 13 marks · Group 2 metal reactions, Thermal decomposition, Formulas, Covalent and dative bonding, Reacting masses and yield, Nitriles and hydroxynitriles
- Question 3 · 14 marks · Structure and properties, Enthalpy change definitions, Oxidation numbers, Period 3 chlorides with water, Organic formulas and naming, Organic synthesis, Oxidising alkenes
- Question 4 · 12 marks · Oxidising alcohols, Characteristic organic reactions, Homogeneous and heterogeneous catalysts, Infrared spectroscopy, Carboxylic acids, Combustion, halogenation and sodium, Intermolecular forces
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.