Chemistry 9701/51 Oct Nov 2009 | Cambridge AS Level Past Papers With Mark Scheme

1. Hydrolysis of magnesium chloride, aluminum chloride, and silicon tetrachloride with water, forming hydroxides and oxides, including solubility changes.
2. Chloride ion titration in meat products with silver nitrate, calculating moles, and writing ionic equations for sodium and potassium chlorides.
3. Iodination of benzene, enthalpy change calculations for iodine formation, and oxidation state changes in iodine and nitrogen.
4. Nitrogen oxides as homogeneous catalysts in acid rain formation, explained through chemical equations.
5. Cu²⁺ electronic configuration, d-orbital splitting in transition metal complexes, and ammonia’s impact on copper solution color.
6. Curcumin structure and functional group analysis, reactions with bromine and KMnO₄ for product identification.