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Combined Science A (Gateway) · OCR J250 · Chemistry Paper 3 · Foundation · June 2023

OCR GCSE Combined Science A (Gateway) Chemistry Paper 3 Foundation June 2023 examiner report (J250/03)

1h 10m 60 marks

Examiner report

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