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Combined Science A (Gateway) · OCR J250 · Chemistry Paper 9 · Higher · June 2023

OCR GCSE Combined Science A (Gateway) Chemistry Paper 9 Higher June 2023 examiner report (J250/09)

1h 10m 60 marks

Examiner report

  1. Q1 - 1 mark - Pure substances
  2. Q2 - 1 mark - Relative formula mass
  3. Q3 - 1 mark - Tests for gases
  4. Q4 - 1 mark - Reactions of acids
  5. Q5 - 1 mark - The three states of matter
  6. Q6 - 1 mark - Mixtures and separation techniques
  7. Q7 - 1 mark - The development of the model of the atom
  8. Q8 - 1 mark - Conservation of mass and balanced equations
  9. Q9 - 1 mark - Moles and amount of substance
  10. Q10 - 1 mark - The three states of matter
  11. Q11 - 12 marks - Bonding, structure and the properties of matter, Chemical bonds, Electronic structure, Ionic bonding and ionic compounds, Subatomic particles
  12. Q12 - 7 marks - Chromatography
  13. Q13 - 7 marks - Chemical bonds, Diamond, graphite, graphene and fullerenes
  14. Q14 - 6 marks - Electrolysis
  15. Q15 - 12 marks - Concentration of solutions, Moles and amount of substance, Reactions of acids, Strong and weak acids, The pH scale and neutralisation
  16. Q16 - 6 marks - Bond energy calculations, Reaction profiles