9701/21/M/J/25 · Chemistry May/June 2025 Paper 21
6 questions, 60 marks. Each one links to its official mark scheme.
- Question 1 · 11 marks · Metallic bonding, Structure and properties, Reactions of Period 3 elements, Period 3 oxides and hydroxides, Oxidation numbers of oxides and chlorides, Oxidation numbers
- Question 2 · 11 marks · Isotopes, Mass spectrometry, Particles in the atom and atomic radius, Electrons, energy levels and atomic orbitals, Ionisation energy
- Question 3 · 10 marks · Temperature and activation energy, Homogeneous and heterogeneous catalysts, Le Chatelier's principle
- Question 4 · 9 marks · Organic formulas and naming, Solution concentrations, Oxidation and reduction, Oxidising alkenes, Infrared spectroscopy
- Question 5 · 12 marks · Esters, Carboxylic acids, Organic synthesis, Oxidising alcohols, Making halogenoalkanes
- Question 6 · 7 marks · Organic formulas and naming, Tests for carbonyls, Iodoform test and acidity
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.