Chemistry 9701/13 May June 2021 | Cambridge AS Level Past Papers With Mark Scheme

1. Empirical and molecular formula determination, combustion stoichiometry, equilibrium constant (Kc) expressions, Boltzmann distribution changes with temperature, and factors influencing equilibrium yield and rates.

2. Trends in Group 17 hydrides and volatilities, solubility tests for halides, reactions of Period 3 oxides, stereoisomerism in organic compounds, and redox processes involving alkene oxidation products.

3. Nucleophilic addition mechanisms for carbonyl compounds, hydrolysis of nitriles to carboxylic acids, alcohol classification by oxidation, and structural analysis of compounds via IR spectra.

4. Reactivity and mechanisms for halogenoalkanes in SN1 and SN2 pathways, reaction orders from stoichiometric and kinetic data, and organic syntheses involving carbonyl and hydrocarbon transformations.

5. Environmental chemistry involving fossil fuel combustion by-products, catalysis in atmospheric reactions, and hydrolysis of disaccharides with enzyme specificity.

6. Bonding trends in metallic elements, tests for sulfate ions, flame retardant molecular analysis, and functional group transformations in organic chemistry under various conditions.