Combined Science (A) J250,09 Higher June 2019, OCR GCSE Past Papers with Mark Schemes

The June 2019 OCR Science GCSE Paper 9 focuses on chemistry, assessing key topics such as atomic structure, bonding, and reaction types. It evaluates knowledge of the periodic table, electrolysis, and energy changes in reactions. Students solve problems involving moles, empirical formulas, and reaction profiles. Practical applications include chromatography, displacement reactions, and neutralization. The paper emphasizes data interpretation, balancing chemical equations, and distinguishing between exothermic and endothermic processes. Keywords: GCSE Chemistry, periodic table, electrolysis, reaction energetics, chromatography, neutralization, empirical formulas, moles, chemical bonding.