Chemistry 9701/23 Oct Nov 2017 | Cambridge AS Level Past Papers With Mark Scheme

1. Haber Process and Reaction Rates: Understanding the factors that affect the rate and yield of ammonia production, including the effects of temperature on the Boltzmann distribution and how Le Chatelier’s principle applies to the equilibrium of ammonia synthesis.
2. Ionization Energy and Periodic Trends: Explaining the trends in ionization energies across Period 3, including exceptions observed between elements like Mg and Al, and P and S, with reference to electron configurations.
3. Halogen Reactions: Analyzing the reactivity of halogens as oxidizing agents and the effects of changes in temperature and pressure on equilibrium reactions involving chlorine, bromine, and iodine.
4. Reactions of 1-Bromobutane and 2-Bromo-2-methylpropane: Understanding different reaction mechanisms (SN1, SN2) in the context of primary and tertiary halogenoalkanes, and comparing the products and mechanisms of their reactions.
5. Stereoisomerism in Organic Compounds: Explaining the concepts of structural and stereoisomerism in compounds like but-1-ene, its reactions with HCl, and the formation of stereoisomers X and Y.
6. Identification and Mechanism of Organic Reactions: Identifying reagents and conditions for organic transformations, understanding reaction mechanisms (addition, elimination, substitution), and analyzing the stereochemistry involved in the formation of isomers.