Chemistry (B) J258,02 Foundation June 2019, OCR GCSE Past Papers with Mark Schemes

The OCR GCSE Chemistry B (Twenty First Century Science) Depth in Chemistry (Foundation Tier) paper from June 2019 evaluates key chemical principles and practical skills. Topics include pH changes, polymerisation, ore processing, and greenhouse gas impacts. The paper emphasizes industrial processes such as ammonia production and copper extraction, alongside calculations for atom economy, percentage yield, and stoichiometry. Experimental techniques like flame tests, chromatography, and emission spectroscopy are assessed. Analytical reasoning and data interpretation are integrated, with a focus on sustainability, reactivity trends, and the role of nanotechnology in medicine and materials science.