Chemistry 9701/12 May June 2015 | Cambridge AS Level Past Papers With Mark Scheme

1. Electron configurations and ionic comparisons for Group 15 and 16 elements, focusing on similarities in electronic structures and neutrons.
2. Thermochemical equations for enthalpy changes in reactions, gas law calculations, and energy changes in combustion and formation processes.
3. Electrolysis processes, reaction mechanisms for equilibrium shifts, and Boltzmann distribution changes with temperature variation.
4. Organic reaction pathways, including alcohol oxidation to ketones, free-radical and nucleophilic substitution mechanisms, and cracking reactions.
5. Structural and functional group analysis in organic compounds, including reactivity with NaBH4, acidity, and molecular formulas for biologically relevant compounds.
6. Environmental chemistry of pollutants, including reaction pathways for nitrogen oxides and sulfur oxides, their atmospheric roles, and acid rain formation.