The exam evaluates foundational chemistry concepts, focusing on reaction rates, hydrocarbons, polymers, water purification, and environmental impact. Key topics include the Haber process, fertilizers, chromatography, alloys, and the role of crosslinks in polymer behavior. Practical applications involve balancing chemical equations, calculating Rf values, analyzing reaction conditions, and testing for ions. It emphasizes interpreting experimental data, understanding molecular structures, and evaluating processes like sewage treatment, potable water production, and sustainable resource management. Keywords: GCSE Chemistry, reaction rates, hydrocarbons, polymers, water purification, chromatography, sustainability, molecular structures, Haber process, ion testing.