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5 marksThe Atmosphere

CAPE Chemistry Unit 2 · 2006 · Paper 2 · Question 9(e)(ii)

Vehicle emissions contain CO, CO₂, nitrogen oxides, water vapour, and lead compounds.

Account for the presence of carbon monoxide and nitrogen oxides in the exhaust gases of cars. Write a balanced equation for the formation of ONE oxide of nitrogen.

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Other parts of this question

  1. 9(a)(i)Briefly describe the principles involved in fractional distillation.[3 marks]
  2. 9(a)(ii)Briefly describe the principles involved in cracking.[2 marks]
  3. 9(b)Give a balanced equation to illustrate cracking.[2 marks]
  4. 9(c)Explain the importance of EITHER fractional distillation OR cracking.[1 mark]
  5. 9(d)Suggest ONE adverse effect associated with the extraction of crude oil and comment on the environmental problems that result.[3 marks]
  6. 9(e)(i)State TWO reasons why the use of leaded petrol is hazardous to human health.[2 marks]
  7. 9(e)(iii)Suggest TWO means by which the amount of carbon monoxide and nitrogen oxides in vehicle exhaust fumes may be reduced to minimize pollution levels.[2 marks]

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