Combined Science (B) J260,06 Higher June 2019, OCR GCSE Past Papers with Mark Schemes

The chemistry exam paper explores topics such as hydrocarbons, nanomaterials, reaction rates, and environmental chemistry. It includes questions on the properties and trends of alkanes, applications of carbon nanotubes, and methods for separating and analyzing mixtures. The exam evaluates the understanding of chemical bonding, reactivity, and stoichiometry, with real-world contexts like catalytic converters, salt extraction, and zinc extraction. Key concepts include molecular structure, intermolecular forces, energy changes in reactions, and the role of catalysts. The paper emphasizes calculations, explanations using particle models, and interpreting experimental data. Total marks: 95.