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Combined Science A (Gateway) · OCR J250 · Chemistry Paper 9 · Higher · June 2019

OCR GCSE Combined Science A (Gateway) Chemistry Paper 9 Higher June 2019 examiner report (J250/09)

1h 10m 60 marks

Examiner report

  1. Q1 - 1 mark - Subatomic particles
  2. Q2 - 1 mark - Formulations
  3. Q3 - 1 mark - The periodic table
  4. Q4 - 1 mark - Mixtures and separation techniques
  5. Q5 - 1 mark - Subatomic particles
  6. Q6 - 1 mark - The three states of matter
  7. Q7 - 1 mark - Conservation of mass and balanced equations
  8. Q8 - 1 mark - Bond energy calculations
  9. Q9 - 1 mark - Chemical bonds
  10. Q10 - 1 mark - Moles and amount of substance, Relative formula mass
  11. Q11 - 12 marks - Chemical bonds, Exothermic and endothermic reactions, Oxidation and reduction in terms of electrons, Reaction profiles
  12. Q12 - 6 marks - Chromatography
  13. Q13 - 14 marks - Amounts of substance in equations, Bonding, structure and the properties of matter, Empirical formulae, Moles and amount of substance, Subatomic particles
  14. Q14 - 6 marks - Conservation of mass and balanced equations, Electrolysis of aqueous solutions
  15. Q15 - 7 marks - Limiting reactants, Moles and amount of substance
  16. Q16 - 5 marks - Reactions of acids, The pH scale and neutralisation