Chemistry 9701/22 March 2020 | Cambridge AS Level Past Papers With Mark Scheme

1. Group 2 chemistry: Reactions of calcium oxide and its trend in melting points, alkaline solutions, and bonding explanations; amphoteric properties of beryllium oxide.
2. Thermodynamics and equilibrium: Dynamic equilibrium characteristics, calculations involving equilibrium constants, and enthalpy changes in reversible reactions like MgO and chlorine.
3. Bonding and isomerism: Structure and bonding in metal halides and oxides, and analysis of optical and cis-trans isomerism in metal complexes.
4. Hydrogen halides: Reactions and trends in boiling points, thermal stability, and interactions of hydrogen halides, including their use in organic synthesis and Lucas's reagent.
5. Organic chemistry: Reaction mechanisms, polymerization, and infrared spectroscopy for unsaturated acids and their derivatives, including functional group analysis and absorption ranges.
6. Glycerol and fatty acid chemistry: Synthesis reactions from glycerol, identification of functional groups, and calculations involving nitroglycerine decomposition and gas volume analysis.
7. NMR and molecular identification: Structural isomerism, NMR analysis of compounds like gallic acid, and interpretation of spectra for functional group identification.