Chemistry 0620/42 Oct Nov 2024 | Cambridge IGCSE Past Papers With Mark Scheme

1. Molecular Properties and Reactions | Identifying molecules based on bonding, chemical properties, and reactions such as photosynthesis, combustion, and substitution.

2. Electrolysis of Aluminium Oxide | Describing aluminium extraction, writing half-equations, explaining anode reactions, and drawing ionic structures of aluminium fluoride.

3. Sulfur Chlorides and Equilibrium | Understanding covalent bonding, drawing dot-and-cross diagrams, explaining reaction conditions affecting equilibrium, and applying collision theory.

4. Precipitation Reactions and Molar Calculations | Determining ionic equations, identifying precipitate colors, calculating product masses, and analyzing procedural errors in gravimetric analysis.

5. Cracking and Polymerization | Writing equations for hydrocarbon cracking, naming polymers, drawing polymer structures, and explaining polymerization processes.

6. Polymer Chemistry and Condensation Reactions | Identifying monomers in polyamides and polyesters, drawing structural formulas, and explaining functional groups in polymerization.