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2 marksThe Atmosphere

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

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

Suggest TWO means by which the amount of carbon monoxide and nitrogen oxides in vehicle exhaust fumes may be reduced to minimize pollution levels.

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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)(ii)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…[5 marks]

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