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Combined Science A (Gateway) · OCR J250 · Chemistry Paper 4 · Foundation · June 2023

OCR GCSE Combined Science A (Gateway) Chemistry Paper 4 Foundation June 2023 examiner report (J250/04)

1h 10m 60 marks

Examiner report

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