Chemistry 5070/21 Oct Nov 2024 | Cambridge O-Level Past Papers With Mark Scheme

1. Atomic Structure & Periodic Table | Identifying Elements & Electron Configurations – Determining group positions, ion formation, and properties of elements in the Periodic Table.

2. Extraction & Properties of Metals | Iron Production & Transition Metal Characteristics – Explaining redox in iron extraction, transition metal properties, and equilibrium in iron compounds.

3. Electrolysis & Conductivity | Electrolysis of Aqueous Sodium Chloride – Identifying electrode reactions, explaining ion movement, and predicting products in electrolysis.

4. Organic Chemistry & Hydrocarbon Reactions | Alkanes, Alkenes, and Cracking – Defining homologous series, drawing isomers, balancing cracking reactions, and calculating enthalpy change.

5. Chemical Reactions & Rates | Reaction of Copper(II) Carbonate with Acid – Writing equations, analyzing reaction graphs, and explaining rate changes with particle size and concentration.

6. Chemical Bonding & Structures | Zinc Sulfide & Molecular Compounds – Predicting electrical conductivity, explaining physical properties, and drawing dot-and-cross diagrams.

7. Acids, Bases & Polymers | Propanoic Acid Reactions & Polyamide Formation – Identifying ester formation, explaining acid properties, and drawing polyamide repeat units.