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Combined Science A (Gateway) · OCR J250 · Chemistry Paper 4 · Foundation · June 2024

OCR GCSE Combined Science A (Gateway) Chemistry Paper 4 Foundation June 2024 examiner report (J250/04)

1h 10m 60 marks

Examiner report

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