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

General formulae

18 practice questions

Start practising (3 questions)

Practice questions

1–3 of 3 · Hard

  1. Question 1

    2 marks · Hard

    State what is meant by the term 'functional group' in organic chemistry. Explain why functional groups are important when studying homologous series.

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  2. Question 2

    5 marks · Hard

    Table 1 shows three members of a homologous series.

    Table 1
    NameMolecular formula
    Methanoic acidCH2O2
    Ethanoic acidC2H4O2
    Propanoic acidC3H6O2
    (a)

    State the general formula for this homologous series.

    [1 mark]
    (b)

    Name the functional group found in all members of this homologous series.

    [1 mark]
    (c)

    Give one feature, other than the general formula, that all members of a homologous series share.

    [1 mark]
    (d)

    Explain why the compounds in this series have similar chemical properties.

    [2 marks]
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  3. Question 3

    2 marks · Hard

    Describe, with an example, what is meant by a functional group in organic chemistry.

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