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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

551–560 of 785

  1. Question 551

    2 marks · Easy

    How many hydrogen atoms are present in one molecule of propanoic acid?

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  2. Question 552

    2 marks · Easy

    Vinegar is commonly used as a cleaning agent in households. Explain why ethanoic acid is important when talking about vinegar.

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  3. Question 553

    3 marks · Easy

    Ethanoic acid is found in vinegar.

    (a)

    State the name of the main acid present in vinegar.

    [1 mark]
    (b)

    Write the molecular formula for ethanoic acid.

    [1 mark]
    (c)

    Give one everyday use of vinegar that depends on its acidic property.

    [1 mark]
    Answer and see the solution →

  4. Question 554

    2 marks · Normal

    State the number of carbon atoms AND draw the structural formula of propanoic acid.

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  5. Question 555

    4 marks · Normal

    This question is about naming carboxylic acids.

    (a)

    Give the name of the carboxylic acid with molecular formula C4H8O2.

    [1 mark]
    (b)

    Write the name and structural formula of the carboxylic acid with molecular formula CH2O2.

    [2 marks]
    (c)

    State how you determine the name of a straight-chain carboxylic acid from its molecular formula.

    [1 mark]
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  6. Question 556

    3 marks · Normal

    Explain how you can identify whether a molecule is a carboxylic acid, using both its structural formula and its name.

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  7. Question 557

    4 marks · Normal

    The table below shows the molecular formulae of some carboxylic acids. Complete the table by filling in the missing names.

    Carboxylic acids to name
    Molecular formulaName
    C2H4O2
    C4H8O2
    CH2O2
    C3H6O2

    Write your answers in the table.

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  8. Question 558

    1 mark · Normal

    Which of the following gives the main component of vinegar?

    1. A.methanoic acid
    2. B.propanoic acid
    3. C.ethanoic acid
    4. D.butanoic acid
    Answer and check →

  9. Question 559

    2 marks · Normal

    Give the molecular formula and the displayed formula for butanoic acid.

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  10. Question 560

    4 marks · Normal

    The table shows several unbranched carboxylic acids:

    NameMolecular formula
    methanoic acidCH2O2
    propanoic acidC3H6O2
    (a)

    Write the name and structural formula of the carboxylic acid with the molecular formula C2H4O2.

    [2 marks]
    (b)

    State the number of carbon atoms in butanoic acid and write its name following IUPAC conventions.

    [2 marks]
    Answer and see the solution →