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3 marksStructure and Formulae

CAPE Chemistry Unit 2 · 2010 · Paper 2 · Question 4(c)(ii)

Draw the geometrical isomers (cis and trans / E and Z) of compound B, and explain why B has no optical isomers.

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  1. 4(a)Explain why compounds A and B are structural isomers.[2 marks]
  2. 4(b)Name two functional groups present in both molecules A and B.[2 marks]
  3. 4(c)(i)Draw the displayed formula of compound A and circle the chiral carbon atom on the molecule.[2 marks]
  4. 4(d)(i)Explain what is meant by the term 'cracking'.[2 marks]
  5. 4(d)(ii)a)Write the chemical equation for the cracking of octane, C8H18, into two hydrocarbon fragments containing the same number of carbon atoms.[2 marks]
  6. 4(d)(ii)b)Describe a simple laboratory test to distinguish between the two hydrocarbon fragments formed from cracking octane.[2 marks]

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