Chemistry 9701/43 Oct Nov 2015 | Cambridge AS Level Past Papers With Mark Scheme

1. Ionic compound dissolution, lattice energy, hydration energy, enthalpy of solution calculations, solubility trends in Group II sulfates.
2. Transition element chemistry, cobalt electronic configurations, formation of complex ions, redox reactions, empirical formula determination of superconductors.
3. Redox reactions between Fe²⁺ and Cl₂, standard cell potential measurement, effect of ion concentration on cell potential, fuel cell reactions, hydrogen-oxygen advantages.
4. Group IV melting point trends, amphoteric oxides reactions, disproportionation, P4 molecular structure, bond energy calculations, PCl₅ and NH₄Cl reaction products.
5. Identification of aldehydes and ketones using specific reagents, nucleophilic addition mechanisms, synthesis of alcohols with organolithium reagents.
6. Organic synthesis of 4-nitrophenol derivatives, reaction pathways for dye preparation, coupling reactions, structural identification of intermediates.
7. DNA replication, fingerprinting techniques, analytical methods for fragment separation, genetic identification through band analysis.
8. Gas chromatography retention times, carrier gas examples, chromatographic limitations for esters, peak area analysis for component percentages, NMR interpretation for ester structure.
9. Prodrug hydrolysis mechanisms, functional group identification, enzymatic bond hydrolysis, solubility factors in prodrug molecules, products of hydrolysis reactions.