Chemistry (B) J258,02 Foundation November 2021, OCR GCSE Past Papers with Mark Schemes

The exam paper evaluates a range of GCSE Chemistry topics, including the formation and environmental impact of nitrogen oxides, reactivity trends in Group 1 and Group 7 elements, electrolysis of aluminium oxide, and metallic bonding. Further sections explore neutralization reactions with calcium carbonate, properties of graphite and graphene, acid concentration effects on pH, metal reactivity comparisons, and atomic radius trends across the periodic table. Questions on rates of reaction and enzymatic decomposition of hydrogen peroxide are included, highlighting practical skills and conceptual understanding.