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Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section

Coding for branched chains

19 practice questions

Start practising (3 questions)

Practice questions

1–3 of 3 · Hard

  1. Question 1

    2 marks · Hard

    A hydrocarbon molecule is named 4-methylhexane.

    Determine from which end of the main chain numbering should start to give the position of the methyl side chain, and explain your choice.

    Answer and see the solution →

  2. Question 2

    5 marks · Hard

    The following hydrocarbon is shown using its skeletal formula:

    Geometry diagram with points C1, C2, C3, C4, C5, M3A
    Skeletal formula of a branched alkane.
    (a)

    State the length (number of carbon atoms) in the longest chain of the molecule.

    [1 mark]
    (b)

    Name the side chain and state the carbon atom number on which it is attached.

    [2 marks]
    (c)

    Write the complete IUPAC name for this molecule.

    [2 marks]
    Answer and see the solution →

  3. Question 3

    2 marks · Hard

    Give the coding (name) for each of the following side chains found in organic molecules:

    Side chain structural formulaCode (name)
    \ce{CH_3}-
    \ce{CH_3CH_2}-
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