9701/21/M/J/23 · Chemistry May/June 2023 Paper 21
5 questions, 60 marks. Each one links to its official mark scheme.
- Question 1 · 13 marks · Particles in the atom and atomic radius, Electrons, energy levels and atomic orbitals, Ionisation energy, Shapes of molecules, Formulas, Characteristic organic reactions
- Question 2 · 9 marks · Enthalpy change definitions, Limiting reagents and stoichiometry, Calorimetry, Formulas
- Question 3 · 15 marks · Lattice structures, Period 3 chlorides with water, The reactions of chlorine, Oxidation and reduction, Alkanes, Formulas, Mass spectrometry
- Question 4 · 8 marks · Carboxylic acids, Oxidation and reduction, Oxidising alkenes, Organic formulas and naming, Shapes of organic molecules; σ and π bonds, Oxidising alcohols
- Question 5 · 15 marks · Alkanes, Nitrogen oxides and pollution, Esters, Making alcohols, Organic formulas and naming
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.