Chemistry (A) J248,03 Higher June 2018, OCR GCSE Past Papers with Mark Schemes

This OCR GCSE Chemistry (Gateway Science) Paper 3 (Higher Tier) focuses on advanced chemical concepts such as atomic structure, chemical bonding, stoichiometry, and electrolysis. Key topics include reaction profiles, activation energy, isotopes, and balancing equations. Practical applications like chromatography, separation techniques, and safety in experiments are assessed. Questions involve data interpretation from periodic tables, bond energy calculations, and molar relationships. The paper emphasizes problem-solving, critical thinking, and the ability to explain phenomena using scientific principles, particularly in areas like nanoparticle uses, redox reactions, and industrial processes.