Chemistry 9701/21 May June 2011 | Cambridge AS Level Past Papers With Mark Scheme

1. Hydrolysis of magnesium chloride, aluminum chloride, and silicon tetrachloride, producing hydroxides, oxides, and solubility observations.
2. Titration of chloride ions in meat products, calculating moles and writing ionic equations for sodium and potassium chlorides.
3. Iodination of benzene, enthalpy calculation for iodine formation, and oxidation state changes in iodine and nitrogen.
4. Nitrogen oxide catalysis in acid rain formation, including equations and catalytic roles.
5. Copper ion complex formation, orbital splitting, Cu²⁺ electronic configuration, and ammonia interaction.
6. Curcumin structure and reactions with bromine and KMnO₄, identifying functional groups and reaction products.