Chemistry 9701/12 Oct Nov 2012 | Cambridge AS Level Past Papers With Mark Scheme

1. Oxidation states in reactions involving chlorine and nitrogen, bond energy calculations for NO, determination of element oxidation states and bond energies.
2. Gas laws applied to ammonia, bond and electron configuration concepts for isotopes, ion formation in sulfur and oxygen compounds.
3. Structural analysis of molecular shapes (tetrahedral, trigonal planar), bond angles, reactions of boron compounds with halides and water.
4. Trends in atomic radius, ionization energy, and decomposition temperatures for Group II elements, with relevant chemical reactions.
5. Qualitative analysis of anions and cations, identification using reagents like NaOH, NH₃, and silver nitrate for halide ions and precipitates.