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

Organic Chemistry

785 practice questions

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Practice questions

131–140 of 785

  1. Question 131

    5 marks · Hard

    This question is about structural isomerism in the alkanes.

    (a)

    Complete the following table for alkanes, giving the number of possible structural isomers for each formula.

    Molecular formulaNumber of structural isomers
    C3H8
    C4H10
    C5H12
    [3 marks]
    (b)

    Explain why C5H12 has more structural isomers than C3H8.

    [2 marks]
    Answer and see the solution →

  2. Question 132

    2 marks · Hard

    Explain why it is not possible to have a structural isomer of methane (CH4).

    Answer and see the solution →

  3. Question 133

    1 mark · Easy

    State the name of the functional group that all alcohols contain.

    Answer and see the solution →

  4. Question 134

    3 marks · Easy

    The diagram below represents an organic compound.

    (a)

    State the homologous series to which this compound belongs.

    [1 mark]
    (b)

    Name the functional group found in this compound.

    [1 mark]
    (c)

    Give the displayed formula of the functional group.

    [1 mark]
    Answer and see the solution →

  5. Question 135

    2 marks · Easy

    The compound propanol is an alcohol. Use the information provided to name its homologous series and explain which part of its name identifies it as an alcohol.

    Answer and see the solution →

  6. Question 136

    2 marks · Easy

    Explain why all alcohols have similar chemical properties. Refer to their functional group in your answer.

    Answer and see the solution →

  7. Question 137

    3 marks · Easy

    The following table lists several organic compounds:

    Compound NameAlcohol? (Yes/No)Suffix in Name
    Ethanol
    Butanol
    Butane
    Propanol

    Complete the table by: (i) Ticking Yes or No to show if each compound is an alcohol. (ii) Writing the suffix in the name that shows the compound is an alcohol.

    Answer and see the solution →

  8. Question 138

    1 mark · Easy

    Write the displayed formula for the functional group present in all alcohols.

    Answer and see the solution →

  9. Question 139

    3 marks · Easy

    The name of a compound can provide information about its structure.

    (a)

    What does the suffix '-ol' at the end of a compound's name show about the compound?

    [1 mark]
    (b)

    Write down the name of two compounds that contain this suffix.

    [2 marks]
    Answer and see the solution →

  10. Question 140

    2 marks · Normal

    State the functional group present in all alcohols. Give its displayed formula.

    Answer and see the solution →