Chemistry 9701/51 May June 2011 | Cambridge AS Level Past Papers With Mark Scheme

1. Hydrolysis reactions of magnesium chloride, aluminum chloride, and silicon tetrachloride with water, producing hydroxides and oxides.
2. Chloride ion quantification in meat products using silver nitrate titration, mole calculations, and ionic equations.
3. Iodination of benzene, enthalpy change for iodine formation, and oxidation state changes in iodine and nitrogen.
4. Nitrogen oxide catalysis in acid rain, including the role of nitrogen oxides as homogeneous catalysts.
5. Copper ion complex formation, Cu²⁺ electronic configuration, orbital splitting, and ammonia’s impact on color.
6. Curcumin's structure, functional group analysis, and reactions with bromine and KMnO₄ for product identification.