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Combined Science A (Gateway) · OCR J250 · Chemistry Paper 4 · Foundation · June 2019

OCR GCSE Combined Science A (Gateway) Chemistry Paper 4 Foundation June 2019 examiner report (J250/04)

1h 10m 60 marks

Examiner report

  1. Q1 - 1 mark - Catalysts
  2. Q2 - 1 mark - Greenhouse gases and climate change
  3. Q3 - 1 mark - The composition and evolution of the atmosphere
  4. Q4 - 1 mark - Reactivity of metals
  5. Q5 - 1 mark - The periodic table
  6. Q6 - 1 mark - Rate of reaction
  7. Q7 - 1 mark - Using electrolysis to extract metals
  8. Q8 - 1 mark - Reactivity of metals
  9. Q9 - 1 mark - The periodic table
  10. Q10 - 1 mark - Factors affecting the rate of reaction
  11. Q11 - 13 marks - Conservation of mass and balanced equations, Tests for gases, The periodic table
  12. Q12 - 10 marks - Atmospheric pollutants, Dynamic equilibrium, Relative formula mass, Reversible reactions
  13. Q13 - 9 marks - Conservation of mass and balanced equations, Crude oil, hydrocarbons and alkanes, Oxidation and reduction in terms of electrons
  14. Q14 - 6 marks - Fractional distillation and petrochemicals
  15. Q15 - 3 marks - Reducing the use of resources
  16. Q16 - 9 marks - Collision theory and activation energy, Reactions of acids