Combined Science (A) J250,03 Foundation June 2022, OCR GCSE Past Papers with Mark Schemes

This chemistry past paper emphasizes concepts such as separation techniques, reactions, atomic structure, and bonding. Key topics include chromatography, endothermic and exothermic reactions, electrolysis, and the formation of ions. Experimental setups explore the properties of nitrogen dioxide, reaction profiles, and fullerenes. Core keywords include “activation energy,“ “oxidizing agent,“ “covalent bonds,“ “empirical formula,“ and “periodic table trends.“ The paper focuses on applied chemistry, practical problem-solving, and data interpretation, aligning theoretical knowledge with real-world scenarios.