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

Organic Chemistry

785 practice questions

Start practising (785 questions)

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Practice questions

421–430 of 785

  1. Question 421

    1 mark · Easy

    What is the displayed formula for ethanol expected to show clearly between the oxygen and hydrogen atoms?

    Answer and see the solution →

  2. Question 422

    3 marks · Easy

    (a)

    Write the IUPAC name of the alcohol with this structural formula: CH3CH2CH2OH.

    [1 mark]
    (b)

    State the number of carbon atoms in this molecule.

    [1 mark]
    (c)

    Give the general formula for straight-chain alcohols.

    [1 mark]
    Answer and see the solution →

  3. Question 423

    2 marks · Easy

    Butan-1-ol has the molecular formula C4H10O.

    Calculate the number of hydrogen atoms needed to form two molecules of butan-1-ol.

    Answer and see the solution →

  4. Question 424

    2 marks · Normal

    State the number of carbon atoms in the molecules of:

    (a)

    methanol

    [1 mark]
    (b)

    butan-1-ol

    [1 mark]
    Answer and see the solution →

  5. Question 425

    4 marks · Normal

    Name each alcohol below using IUPAC conventions.

    (a)

    An alcohol with the molecular formula C2H6O and the structural formula CH3CH2OH.

    [1 mark]
    (b)

    An alcohol with the molecular formula C3H8O where the -OH group is attached to the second carbon atom.

    [1 mark]
    (c)

    An alcohol with four carbon atoms and the -OH group attached to the first carbon atom.

    [1 mark]
    (d)

    State another acceptable name that could be used for butan-1-ol in an exam.

    [1 mark]
    Answer and see the solution →

  6. Question 426

    3 marks · Normal

    Explain why both 'propanol' and 'propan-2-ol' could be correct names for different alcohol compounds. Use the structure and position of the –OH group in your answer.

    Answer and see the solution →

  7. Question 427

    4 marks · Normal

    Table 1 shows information about some alcohols.

    Table 1. Formulae of some alcohols
    NameMolecular formulaStructural formula
    methanolCH4OCH3OH
    ethanolC2H6OCH3CH2OH
    ?C3H8OCH3CH2CH2OH
    butan-2-olC4H10OCH3CHOHCH2CH3
    (a)

    Name the alcohol in Table 1 with the molecular formula C3H8O and the structural formula CH3CH2CH2OH.

    [1 mark]
    (b)

    How many carbon atoms are present in ethanol?

    [1 mark]
    (c)

    Write the displayed formula for methanol, showing all bonds.

    [2 marks]
    Answer and see the solution →

  8. Question 428

    1 mark · Normal

    Which of the following is the correct IUPAC name for the alcohol with the structural formula CH3CHOHCH2CH3?

    1. A.butan-2-ol
    2. B.butan-1-ol
    3. C.butanol-2
    4. D.butenal
    Answer and check →

  9. Question 429

    2 marks · Normal

    State the molecular formula and the structural formula for ethanol.

    (a)

    Molecular formula

    [1 mark]
    (b)

    Structural formula

    [1 mark]
    Answer and see the solution →

  10. Question 430

    4 marks · Normal

    Answer the following questions about the alcohol with the displayed formula:

    (a)

    State the IUPAC name for this alcohol.

    [1 mark]
    (b)

    Give its molecular formula.

    [1 mark]
    (c)

    Write its structural formula.

    [1 mark]
    (d)

    Explain why this alcohol is the simplest member of its homologous series.

    [1 mark]
    Answer and see the solution →