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Combined Science A (Gateway) · OCR J250 · Chemistry Paper 10 · Higher · June 2023

OCR GCSE Combined Science A (Gateway) Chemistry Paper 10 Higher June 2023 examiner report (J250/10)

1h 10m 60 marks

Examiner report

  1. Q1 - 1 mark - Catalysts
  2. Q2 - 1 mark - The periodic table
  3. Q3 - 1 mark - The periodic table
  4. Q4 - 1 mark - Cracking and alkenes
  5. Q5 - 1 mark - Fractional distillation and petrochemicals
  6. Q6 - 1 mark
  7. Q7 - 1 mark - Extraction of metals and reduction
  8. Q8 - 1 mark - The periodic table
  9. Q9 - 1 mark - Potable water
  10. Q10 - 1 mark - Rate of reaction
  11. Q11 - 12 marks - Collision theory and activation energy, Factors affecting the rate of reaction, Rate of reaction, Reactions of acids, The three states of matter
  12. Q12 - 9 marks - Greenhouse gases and climate change, The composition and evolution of the atmosphere
  13. Q13 - 7 marks - Alternative methods of extracting metals, Extraction of metals and reduction, Greenhouse gases and climate change
  14. Q14 - 6 marks - Reactivity of metals, The periodic table
  15. Q15 - 6 marks - Conservation of mass and balanced equations, Oxidation and reduction in terms of electrons, The periodic table
  16. Q16 - 10 marks - Dynamic equilibrium, Reversible reactions, The effect of changing conditions on equilibrium