Chemistry 9701/06 May June 2004 | Cambridge AS Level Past Papers With Mark Scheme

1. Proteins and Their Structures: Involves understanding the secondary and tertiary structures of proteins, explaining how denaturation affects these structures under different conditions (pH and heavy metal ions), and providing examples of denaturation in everyday life.
2. Phosphoglyceride and Membrane Structure: Exploring the structure and properties of phosphoglycerides, their zwitterionic nature, and the fluid mosaic model of biological membranes, including the function of different components.
3. Environmental Chemistry: Discussing factors affecting carbon dioxide levels, greenhouse gases, methods to dispose of CO2, and how soil properties and clay minerals influence soil chemistry and plant growth.
4. Phase Equilibria and Enthalpy: Understanding the molar enthalpy of vaporization, drawing boiling point-composition curves, and explaining azeotropic points with respect to ethanol and cyclohexane mixtures.
5. Spectroscopy and Mass Spectrometry: Analyzing NMR spectra, explaining the origin of peaks in mass spectra, and interpreting IR spectra to identify functional groups in organic compounds.
6. Transition Elements and Ligands: Understanding ligands, complex formation, and the use of EDTA in treating metal poisoning, including calculations to assess the efficiency of EDTA in complexing with different metal ions.
7. Potassium Manganate(VII) and Electrolysis: Describing the electrochemical processes involved in the production of potassium manganate(VII) and the reactions it undergoes under acidic, neutral, and alkaline conditions.