Chemistry 9701/41 May June 2013 | Cambridge AS Level Past Papers With Mark Scheme

1. Standard electrode potential definition, measurement setup for Fe³⁺/Fe²⁺ electrodes, equilibrium constants, and Kc calculation from concentration data.

2. Hydrolysis kinetics of ethyl ethanoate, first-order reaction confirmation, determination of HCl dependence, and calculation of rate constants with rate equations.

3. Density comparison of iron and calcium using atomic mass and lattice structure, classification of transition metal reactions, and percentage composition analysis of aluminum in an alloy.

4. N₂ molecule reactivity explanation, NOx formation under high temperatures, environmental effects of nitrogen oxides, and amine basicity comparison between ethylamine, phenylamine, and ammonia.

5. Reaction mechanisms for pharmaceutical intermediates from chloromethylbenzene, including reagent selection, intermediate structures, and chemical transformations.

6. Distinction between A and B compounds via reactions with Br₂, HBr, heated Al₂O₃, and acidified dichromate, including structural product identification.

7. DNA fingerprinting methodology, applications in material analysis, and separation of chemical mixtures using chromatography techniques.

8. Polymerization of propenoic acid, water absorption influenced by polymer composition, heavy metal remediation using polymer gels, and structural considerations for hair gel solubility.