9701/12/O/N/25 · Chemistry October/November 2025 Paper 12
40 questions, 40 marks. Each one links to its official mark scheme.
- Question 1 · 1 mark · Electrons, energy levels and atomic orbitals
- Question 2 · 1 mark · Ionisation energy
- Question 3 · 1 mark · Limiting reagents and stoichiometry
- Question 4 · 1 mark · Relative masses of atoms and molecules
- Question 5 · 1 mark · Covalent and dative bonding
- Question 6 · 1 mark · Shapes of molecules
- Question 7 · 1 mark · Period 3 physical properties
- Question 8 · 1 mark · Gases and pV = nRT
- Question 9 · 1 mark · Calorimetry
- Question 10 · 1 mark · Oxidation and reduction
- Question 11 · 1 mark · Oxidation numbers
- Question 12 · 1 mark · Le Chatelier's principle
- Question 13 · 1 mark · Haber and Contact processes
- Question 14 · 1 mark · Rate of reaction
- Question 15 · 1 mark · Enthalpy change definitions
- Question 16 · 1 mark · Nitrogen oxides and pollution
- Question 17 · 1 mark · Particles in the atom and atomic radius
- Question 18 · 1 mark · Period 3 oxides and hydroxides
- Question 19 · 1 mark · Thermal decomposition
- Question 20 · 1 mark · Group 2 trends and solubility
- Question 21 · 1 mark · The reactions of chlorine
- Question 22 · 1 mark · Some reactions of the halide ions
- Question 23 · 1 mark · Period 3 chlorides with water
- Question 24 · 1 mark · Nitrogen and ammonia
- Question 25 · 1 mark · Shapes of organic molecules; σ and π bonds
- Question 26 · 1 mark · Finding isomerism in a structure
- Question 27 · 1 mark · Addition polymers and the bromine test
- Question 28 · 1 mark · Oxidising alkenes
- Question 29 · 1 mark · Electrophilic addition
- Question 30 · 1 mark · Nucleophilic substitution reactions
- Question 31 · 1 mark · SN1 and SN2
- Question 32 · 1 mark · Making alcohols
- Question 33 · 1 mark · Carboxylic acids
- Question 34 · 1 mark · Reduction and nucleophilic addition
- Question 35 · 1 mark · Organic synthesis
- Question 36 · 1 mark · Carboxylic acids
- Question 37 · 1 mark · Carboxylic acids
- Question 38 · 1 mark · Gas volumes
- Question 39 · 1 mark · Addition polymerisation
- Question 40 · 1 mark · Infrared spectroscopy
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.