Combined Science (A) J250,03 Foundation June 2018, OCR GCSE Past Papers with Mark Schemes

This chemistry exam addresses fundamental and applied concepts, including atomic structure, bonding, and chemical reactions. Topics range from the electrolysis of ionic compounds and calculating empirical formulas to chromatography and reaction energetics. Practical skills are tested through laboratory setups for crystallization and melting point determination. Advanced applications include carbon nanotubes, their properties, and their comparison to metals. The exam emphasizes quantitative problem-solving, experimental design, and the interpretation of chemical phenomena, linking theoretical knowledge to real-world contexts such as electroplating, chromatography, and material science.