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4 marksCrude Oil

CAPE Chemistry Unit 2 · May/June 2022 · Paper 2 · Question 3(a)

Crude oil is a complex mixture of hydrocarbons that needs to be separated and modified. Table 2 shows crude oil fractions and their uses.

Complete Table 2 by inserting the missing information in the blank spaces.

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Other parts of this question

  1. 3(b)(i)Define the term 'catalytic cracking'.[2 marks]
  2. 3(b)(ii)Write a balanced equation to show the products of the cracking of decane, C₁₀H₂₂.[2 marks]
  3. 3(b)(iii)Explain the principles involved in the fractional distillation of crude oil.[3 marks]
  4. 3(b)(iv)Explain how ONE adverse effect of the petroleum industry can impact the environment.[3 marks]
  5. 3(c)(i)Define EACH of the following terms: Reuse, Recycle, Reduce.[3 marks]
  6. 3(c)(ii)Discuss how the concepts of reuse, recycle and reduce can be applied practically to glass waste.[3 marks]
  7. 3(d)Describe the chemical processes involved in the production of chlorine and sodium hydroxide when the diaphragm cell is used. Your answer must include the types…[5 marks]
  8. 3(e)(i)Describe the chemical changes which occur to produce hydrochloric acid.[2 marks]
  9. 3(e)(ii)Describe the chemical changes which occur to produce sodium hypochlorite (bleach).[1 mark]
  10. 3(e)(iii)TWO modifications that could be made to the structure of the electrolytic cell to ensure that these chemical changes in (e)(ii) do not occur.[2 marks]

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