Chemistry 9701/41 May June 2015 | Cambridge AS Level Past Papers With Mark Scheme

1. Electronic configurations, molecular formula prediction, and molecular shapes for oxygen and fluorine compounds.
2. Reactivity comparison of chloroalkanes and acyl chlorides, with reaction mechanisms and fuming byproduct identification.
3. Mass spectrometry analysis for isotopic abundance and relative atomic mass calculation, focusing on magnesium isotopes.
4. Solubility product calculations for sparingly soluble salts, Hess's law energy cycles, and effects on electrochemical cell potential with specific reagents.
5. Observations and equations for reactions of Group IV chlorides with water, addressing reactivity differences and implications for oxidation states.
6. Polymerization and synthesis of commercially important compounds from aromatic hydrocarbons, including structural drawing of polymer units.
7. Mechanisms and conditions for alkene reactions, such as cracking and electrophilic addition, with product analysis for isomers and intermediates.
8. Enzyme catalysis, protein structure determination, and DNA fingerprinting techniques, including applications in molecular biology and archaeology.
9. Environmental and chemical analysis of shale gas composition, energy efficiency comparisons, and pollution contributions for different fossil fuels.