9701/21/O/N/23 · Chemistry October/November 2023 Paper 21
4 questions, 60 marks. Each one links to its official mark scheme.
- Question 1 · 22 marks · Electrons, energy levels and atomic orbitals, Ionisation energy, Particles in the atom and atomic radius, Some reactions of the halide ions, Structure and properties, Period 3 chlorides with water, Dot-and-cross diagrams, Enthalpy change definitions, Hess’s law
- Question 2 · 10 marks · Group 2 trends and solubility, Group 2 oxides, hydroxides and carbonates, Carboxylic acids, Group 2 metal reactions, Thermal decomposition, Esters
- Question 3 · 12 marks · Oxidation and reduction, Homogeneous and heterogeneous catalysts, Gases and pV = nRT, Gas volumes, Oxidising alcohols, Tests for carbonyls, Structural isomerism
- Question 4 · 16 marks · Organic formulas and naming, Cis/trans isomerism, Structural isomerism, Electrophilic addition, Addition polymerisation, Mass spectrometry, Addition polymers and the bromine test, Organic synthesis
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.