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

Organic Chemistry

785 practice questions

Start practising (317 questions)

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Practice questions

221–230 of 317 · Easy

  1. Question 221

    5 marks · Easy

    Alcohols are used as biofuels. This question is about naming alcohols and their reactions.

    (a)

    Give the IUPAC name for the alcohol with the structural formula CH3CH2CH2OH.

    [1 mark]
    (b)

    State the homologous series to which ethanol belongs.

    [1 mark]
    (c)

    Write the word equation for the complete combustion of ethanol.

    [2 marks]
    (d)

    State one advantage of using ethanol as a fuel.

    [1 mark]
    Answer and see the solution →

  2. Question 222

    1 mark · Easy

    Name the carboxylic acid that is the main acidic component in vinegar.

    Answer and see the solution →

  3. Question 223

    3 marks · Easy

    This question is about drawing carboxylic acids.

    (a)

    State the number of carbon atoms in methanoic acid.

    [1 mark]
    (b)

    Draw the displayed formula for ethanoic acid.

    [2 marks]
    Answer and see the solution →

  4. Question 224

    2 marks · Easy

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

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  5. Question 225

    3 marks · Easy

    The table shows the molecular formulae of four carboxylic acids.

    NameMolecular formula
    methanoic acidCH2O2
    ethanoic acidC2H4O2
    propanoic acidC3H6O2
    butanoic acidC4H8O2
    (a)

    Which acid in the table has the greatest number of hydrogen atoms?

    [1 mark]
    (b)

    How many carbon atoms does ethanoic acid have?

    [1 mark]
    (c)

    Give the name of the acid with formula .

    [1 mark]
    Answer and see the solution →

  6. Question 226

    1 mark · Easy

    What is the name of the carboxylic acid with the unbranched chain and molecular formula ?

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  7. Question 227

    2 marks · Easy

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

    Answer and see the solution →

  8. Question 228

    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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  9. Question 229

    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 →

  10. Question 230

    1 mark · Easy

    State the gas produced when magnesium metal reacts with dilute propanoic acid.

    Answer and see the solution →