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Combined Science A (Gateway) · OCR J250 · Chemistry Paper 4 · Foundation · November 2021

OCR GCSE Combined Science A (Gateway) Chemistry Paper 4 Foundation November 2021 mark scheme J250/04

1h 10m 60 marks

Practise the past exam questions by topic

Atmospheric pollutants12 Qs Periodic table45 Qs Life cycle assessment8 Qs Composition & evolution of the atmosphere17 Qs +12 more
18 questions
  1. Q1 - 1 mark - Atmospheric pollutants
  2. Q2 - 1 mark - The periodic table
  3. Q3 - 1 mark - Life cycle assessment
  4. Q4 - 1 mark - The composition and evolution of the atmosphere
  5. Q5 - 1 mark - The periodic table
  6. Q6 - 1 mark - Greenhouse gases and climate change
  7. Q7 - 1 mark - Empirical formulae
  8. Q8 - 1 mark - Conservation of mass and balanced equations
  9. Q9 - 1 mark
  10. Q10 - 1 mark - Greenhouse gases and climate change
  11. Q11 - 4 marks - The periodic table
  12. Q12 - 7 marks - The periodic table
  13. Q13 - 7 marks - Atmospheric pollutants, Crude oil, hydrocarbons and alkanes, Fractional distillation and petrochemicals
  14. Q14 - 7 marks - Conservation of mass and balanced equations, Exothermic and endothermic reactions, Reversible reactions
  15. Q15 - 7 marks - Conservation of mass and balanced equations, Electrolysis, Reducing the use of resources
  16. Q16 - 6 marks - Greenhouse gases and climate change
  17. Q17 - 8 marks - Collision theory and activation energy, Rate of reaction
  18. Q18 - 4 marks - Catalysts