Chemistry 9701/43 Oct Nov 2013 | Cambridge AS Level Past Papers With Mark Scheme

1. Thermal decomposition of nitrates and reaction trends in Group II, including stability factors and gaseous product analysis using magnesium nitrate as an example.
2. Deviations of real gases from ideal behavior under high pressure and low temperature conditions, and aluminum chloride dimerization with endothermic dissociation.
3. Bond energy trends in halogens and their implications for thermal stabilities of hydrogen halides, including reaction enthalpy calculations for hydrides of Group VII elements.
4. Reactions of bromine with various organic compounds under different conditions, focusing on substitution, addition, and oxidation mechanisms.
5. Analysis of amino acids, including amphiprotic behavior, zwitterionic structures, dipeptide formation, and stereoisomerism in threonine.
6. Role of enzymes and inhibitors in biochemical reactions, comparison of competitive and non-competitive inhibition effects, and ATP hydrolysis as an energy source.
7. Structural and electronic analysis of carbon allotropes, including graphite, diamond, graphene, and buckminsterfullerene, with applications in conductivity and material science.
8. Use of NMR and X-ray crystallography in structural determination, highlighting differences in detecting hydrogen atoms and analyzing cysteine.