9701/23/M/J/25 · Chemistry May/June 2025 Paper 23
6 questions, 60 marks. Each one links to its official mark scheme.
- Question 1 · 10 marks · Electrons, energy levels and atomic orbitals, Ionisation energy, Particles in the atom and atomic radius
- Question 2 · 8 marks · Period 3 oxides and hydroxides, Oxidation numbers of oxides and chlorides, Structure and properties, Brønsted–Lowry theory of acids and bases
- Question 3 · 7 marks · Alkanes, Nitrogen oxides and pollution, Electrophilic addition, Temperature and activation energy, Homogeneous and heterogeneous catalysts
- Question 4 · 11 marks · Rate of reaction, Limiting reagents and stoichiometry, Shapes of molecules, Intermolecular forces
- Question 5 · 14 marks · Organic formulas and naming, Carboxylic acids, Shapes of organic molecules; σ and π bonds, Oxidation and reduction, Esters, Infrared spectroscopy, Addition polymerisation, Addition polymers and the bromine test
- Question 6 · 10 marks · Characteristic organic reactions, The reactions of chlorine, Addition polymers and the bromine test, Nucleophilic substitution reactions, Nitriles and hydroxynitriles
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.