5070/12/O/N/25 · O Level Chemistry October/November 2025 Paper 12
40 questions, 40 marks. Each one links to its official mark scheme.
- Question 1 · 1 mark · Solids, liquids and gases
- Question 2 · 1 mark · Solids, liquids and gases
- Question 3 · 1 mark · Atomic structure and the Periodic Table
- Question 4 · 1 mark · Atomic structure and the Periodic Table
- Question 5 · 1 mark · Ion and ionic bonds
- Question 6 · 1 mark · Giant covalent structures
- Question 7 · 1 mark · Formulae
- Question 8 · 1 mark · Relative masses of atoms and molecules
- Question 9 · 1 mark · The mole and the Avogadro constant
- Question 10 · 1 mark · The mole and the Avogadro constant
- Question 11 · 1 mark · Electrolysis
- Question 12 · 1 mark · Exothermic and endothermic reactions
- Question 13 · 1 mark · Exothermic and endothermic reactions
- Question 14 · 1 mark · Physical and chemical changes
- Question 15 · 1 mark · Rate of reaction
- Question 16 · 1 mark · Rate of reaction
- Question 17 · 1 mark · Reversible reactions and equilibrium
- Question 18 · 1 mark · Redox
- Question 19 · 1 mark · The characteristic properties of acids and bases
- Question 20 · 1 mark · Preparation of salts
- Question 21 · 1 mark · Arrangement of elements
- Question 22 · 1 mark · Group I properties
- Question 23 · 1 mark · Noble gases
- Question 24 · 1 mark · Metallic bonding
- Question 25 · 1 mark · Reactivity series
- Question 26 · 1 mark · Corrosion of metals
- Question 27 · 1 mark · Extraction of metals
- Question 28 · 1 mark · Water
- Question 29 · 1 mark · Air quality and climate
- Question 30 · 1 mark · Formulae, functional groups and terminology
- Question 31 · 1 mark · Formulae, functional groups and terminology
- Question 32 · 1 mark · Carboxylic acids
- Question 33 · 1 mark · Fuels
- Question 34 · 1 mark · Alkenes
- Question 35 · 1 mark · Carboxylic acids
- Question 36 · 1 mark · Polymers
- Question 37 · 1 mark · Experimental design
- Question 38 · 1 mark · Separation and purification
- Question 39 · 1 mark · Identification of ions and gases
- Question 40 · 1 mark · Identification of ions and gases
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.