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4 marksSources of Hydrocarbon Compounds

CSEC Chemistry · January 2016 · Paper 2 · Question 5(b)

Plastics are made from the naphtha fraction obtained from fractional distillation of petroleum.

List TWO other fractions that can be obtained and state ONE use of EACH fraction.

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Other parts of this question

  1. 5(a)State ONE natural source of hydrocarbons.[1 mark]
  2. 5(c)(i)Define the term 'cracking'.[1 mark]
  3. 5(c)(ii)How does catalytic cracking differ from thermal cracking?[2 marks]
  4. 5(d)(i)Write an equation, using FULLY displayed structures, which summarizes the expected reactions in EACH case. Identify any products formed.[5 marks]
  5. 5(d)(ii)Write a balanced chemical equation for the complete combustion of pentane.[2 marks]

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