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

Carboxylic Acids

48 practice questions

Start practising (19 questions)

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Practice questions

1–10 of 19 · Easy

  1. Question 1

    1 mark · Easy

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

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  2. Question 2

    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]
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  3. Question 3

    2 marks · Easy

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

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  4. Question 4

    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]
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  5. Question 5

    1 mark · Easy

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

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  6. Question 6

    2 marks · Easy

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

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  7. Question 7

    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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  8. Question 8

    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]
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  9. Question 9

    1 mark · Easy

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

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  10. Question 10

    3 marks · Easy

    Ethanoic acid is a weak acid.

    (a)

    State the colour change seen when blue litmus paper is placed in ethanoic acid.

    [1 mark]
    (b)

    Explain what is meant by the term "weak acid".

    [2 marks]
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