2 marksFunctional Group Analysis, Reactions and Mechanisms

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

Crude oil is refined and processed through fractional distillation and cracking.

Briefly describe the principles involved in cracking.

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9(a)(i)Briefly describe the principles involved in fractional distillation.[3 marks]
9(b)Give a balanced equation to illustrate cracking.[2 marks]
9(c)Explain the importance of EITHER fractional distillation OR cracking.[1 mark]
9(d)Suggest ONE adverse effect associated with the extraction of crude oil and comment on the environmental problems that result.[3 marks]
9(e)(i)State TWO reasons why the use of leaded petrol is hazardous to human health.[2 marks]
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]
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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