Edexcel GCSE Combined Science Paper 4: Chemistry 2 Higher June 2025 examiner report (1SC0/2CH)
Examiner report
- Q1 - 9 marks - Catalysts, Collision theory and activation energy, Concentration of solutions, Factors affecting the rate of reaction
- Q2 - 7 marks - Covalent bonding, Empirical formulae, Properties of hydrocarbons
- Q3 - 10 marks - Group 1: the alkali metals, Ionic bonding and ionic compounds, Moles and amount of substance
- Q4 - 9 marks - Exothermic and endothermic reactions, Group 0: the noble gases, Properties of small molecules, Reaction profiles
- Q5 - 13 marks - Atmospheric pollutants, Crude oil, hydrocarbons and alkanes, Diamond, graphite, graphene and fullerenes, Greenhouse gases and climate change, Moles and amount of substance
- Q6 - 12 marks - Bond energy calculations, Factors affecting the rate of reaction, Group 7: the halogens, Subatomic particles
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