Chemistry 9701/13 May June 2013 | Cambridge AS Level Past Papers With Mark Scheme

1. Redox reaction analysis involving vanadium and sulfur, bond energy calculations for methanal combustion, and decomposition analysis of magnesium nitrate.

2. Ionization energy trends for Group IV elements, Boltzmann energy distribution changes with temperature, and Pd²⁺ as a catalyst in oxidation reactions.

3. Gas behavior deviations at room temperature, molecular mass determination from vapor density, and empirical formula identification for compounds.

4. Titration-based mass percentage calculations for sodium bicarbonate, halogen reactivity trends, and solubility-enthalpy relationships for halides and hydrogen halides.

5. Organic reaction mechanisms including nucleophilic substitution, elimination, and radical termination steps during bromination of hydrocarbons.

6. Structural and stereoisomerism in C4H8 derivatives, conversion pathways for carbanions and carbocations, and transition element applications in catalytic processes.

7. Synthesis of ethanoic acid via hydrolysis and oxidation, formation of isomeric esters from methanoic acid, and polymerization of cyclohexene for addition polymers.

8. Giant molecular structures, atmospheric oxidation of sulfur-based compounds, and halogenoalkane-treated fabric applications for safety and durability.