Chemistry 9701/21 Oct Nov 2016 | Cambridge AS Level Past Papers With Mark Scheme

1. Molecular calculations for Group 14 chlorides, including stoichiometric determination, moles of HCl, and molecular and atomic masses of compounds.
2. Enthalpy calculations, involving combustion reactions, heat energy changes, and enthalpy cycles for organic compounds like ethanol and C3H7OH.
3. Trends in Group 2 elements, analyzing atomic and ionic radii, reactions with water, thermal decomposition, and neutralization properties for agricultural applications.
4. Organic compound analysis, including stereoisomerism, polymerization reactions, and mechanisms of electrophilic addition with hydrogen halides.
5. Reaction sequences in organic chemistry, with reagents, conditions, and product identification involving alcohols, aldehydes, and carboxylic acids.
6. Application of standard thermodynamic and reaction mechanisms concepts across structured questions to test advanced problem-solving and theoretical understanding.