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Combined Science A (Gateway) · OCR J250 · Chemistry Paper 10 · Higher · June 2018

OCR GCSE Combined Science A (Gateway) Chemistry Paper 10 Higher June 2018 examiner report (J250/10)

1h 10m 60 marks

Examiner report

  1. Q1 - 1 mark - Extraction of metals and reduction
  2. Q2 - 1 mark - The composition and evolution of the atmosphere
  3. Q3 - 1 mark - Dynamic equilibrium
  4. Q4 - 1 mark - The periodic table
  5. Q5 - 1 mark - Fractional distillation and petrochemicals
  6. Q6 - 1 mark - Reactivity of metals
  7. Q7 - 1 mark - The periodic table
  8. Q8 - 1 mark - The periodic table
  9. Q9 - 1 mark - Catalysts
  10. Q10 - 1 mark - Alternative methods of extracting metals
  11. Q11 - 6 marks - Life cycle assessment
  12. Q12 - 4 marks - Rate of reaction
  13. Q13 - 2 marks - Crude oil, hydrocarbons and alkanes
  14. Q14 - 8 marks - Factors affecting the rate of reaction, Rate of reaction
  15. Q15 - 6 marks - Greenhouse gases and climate change
  16. Q16 - 8 marks - Conservation of mass and balanced equations, The periodic table
  17. Q17 - 7 marks - Conservation of mass and balanced equations, Using electrolysis to extract metals
  18. Q18 - 9 marks - Amounts of substance in equations, The effect of changing conditions on equilibrium