Chemistry 9701/12 May June 2013 | Cambridge AS Level Past Papers With Mark Scheme

1. Oxidation state changes in electrolysis reactions involving molten aluminum oxide with carbon electrodes, focusing on gas evolution mechanisms.
2. Ionization energy calculations for sodium and the thermodynamic relationships between ionization and enthalpy changes.
3. Factors affecting activation energy, including catalyst presence and molecular energy distribution (Maxwell-Boltzmann).
4. Dynamic equilibrium responses in the sulfur dioxide and oxygen reaction, emphasizing pressure effects on rate and equilibrium position.
5. Bonding and molecular behavior deviations from ideal gas laws due to intermolecular forces, using ethanol vapor as an example.
6. Enthalpy change calculations for combustion and neutralization reactions, incorporating molarity, heat capacity, and stoichiometric principles.
7. Group trends in halogens, analyzing boiling points, bond strengths, and electronegativity variations.
8. Organic reaction pathways involving alcohols, aldehydes, and carboxylic acids, with emphasis on oxidation, reduction, and elimination mechanisms.
9. Structural and stereoisomer enumeration, focusing on compounds with multiple functional groups and their reactivity in different chemical environments.
10. Polymerization chemistry, comparing properties of carbon-carbon bonds in monomers and polymers such as poly(ethene).