Chemistry 5070/22 Oct Nov 2024 | Cambridge O-Level Past Papers With Mark Scheme

1. Atomic Structure & Periodic Table | Electronic configurations, noble gases, corrosion-resistant metals, Group V elements, and stable ion formation.

2. Iron Extraction & Properties | Blast furnace reactions, carbon monoxide hazards, limestone decomposition, transition metal properties, and rust prevention by galvanization.

3. Electrolysis of Sulfuric Acid | Definition of electrolysis, identifying electrodes, cathode/anode products, ionic half-equations, and suitable electrode materials.

4. Alkanes & Alkenes | Homologous series characteristics, butane structure, naphtha fraction uses, cracking of hydrocarbons, and addition reactions with halogens.

5. Reaction Kinetics & Collision Theory | Zinc reaction with acid, reaction rate trends, powdered vs. solid zinc reaction, gas volume calculations, and reaction pathway diagrams.

6. Boron & Nitrogen Compounds | High melting points in covalent structures, electrical conductivity in simple molecules, redox reactions, and limiting reactant calculations.

7. Esters & Polymers | General ester formula, polymerization reactions, structural formulas of esters, PET recycling processes, and ethanoic acid reactions.

8. Chemical Bonding & States of Matter | Particle arrangements in liquids, oxidation number determination, and balancing redox reactions.