Combined Science (B) J260,02 Foundation June 2023, OCR GCSE Past Papers with Mark Schemes

The chemistry exam paper evaluates knowledge of Mendeleev′s periodic table, bonding types, neutralization, electrolysis, and reaction rates. It covers key topics like halogen reactivity, hydrocarbon formulas, reversible reactions, crude oil dependency, and global warming. Practical applications include titration, chromatography, and analyzing trends in carbon emissions. Keywords: “periodic trends,“ “Group 1 reactivity,“ “ionic vs covalent bonds,“ “dynamic equilibrium,“ “carbon footprint,“ and “Rf values.“ The paper emphasizes critical thinking, data interpretation, and the application of theoretical principles to real-world contexts.