Chemistry 9701/23 Oct Nov 2012 | Cambridge AS Level Past Papers With Mark Scheme

1. Glucose Oxidation and CO₂ Production: Balanced equations, mole and mass calculations for CO₂ from glucose, total CO₂ emissions from global population, fossil fuel combustion calculations for CO₂ output.
2. Octane Combustion: Balanced equation for octane combustion, mole calculations for fuel volume, CO₂ produced in car travel, comparison of CO₂ emissions from respiration and car travel.
3. Sulfuric Acid and Sodium Chloride Reactions: Reaction observations, strong acid definitions, reactions with sodium iodide, and silver nitrate for halide detection.
4. Hydrogen Production from Methane: Effect of pressure and temperature on equilibrium, rate effects of pressure, water-gas shift reaction and equilibrium constant calculations.
5. Organic Reactions and Functional Groups: Reactions of alcohols, carbonyl compounds, and carboxylic acids with reagents like NaBH₄, Tollens' reagent, KOH, Cr₂O₇²⁻/H⁺, and PCl₅, identifying color changes and reactions.
6. C4H8O Isomerism: Structural formulae of isomers, cis-trans isomerism, chiral centers identification, reactions with 2,4-dinitrophenylhydrazine, and Fehling’s solution.