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Combined Science A (Gateway) · OCR J250 · Chemistry Paper 3 · Foundation · June 2022

OCR GCSE Combined Science A (Gateway) Chemistry Paper 3 Foundation June 2022 examiner report (J250/03)

1h 10m 60 marks

Examiner report

  1. Q1 - 1 mark - Chromatography
  2. Q2 - 1 mark - Tests for gases
  3. Q3 - 1 mark - Exothermic and endothermic reactions
  4. Q4 - 1 mark - Reactions of acids
  5. Q5 - 1 mark - The pH scale and neutralisation
  6. Q6 - 1 mark - Electrolysis
  7. Q7 - 1 mark - Reaction profiles
  8. Q8 - 1 mark - Bonding, structure and the properties of matter
  9. Q9 - 1 mark - Empirical formulae
  10. Q10 - 1 mark - Oxidation and reduction in terms of electrons
  11. Q11 - 10 marks - Chemical bonds, Conservation of mass and balanced equations, Pure substances, Relative formula mass, The three states of matter
  12. Q12 - 14 marks - Electronic structure, Ionic bonding and ionic compounds, Subatomic particles
  13. Q13 - 8 marks - Conservation of mass and balanced equations
  14. Q14 - 6 marks - Mixtures and separation techniques, Reactions of acids
  15. Q15 - 12 marks - Chemical bonds, Diamond, graphite, graphene and fullerenes, Subatomic particles