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

Making a polyester

19 practice questions

Start practising (8 questions)

Practice questions

1–8 of 8 · Normal

  1. Question 1

    2 marks · Normal

    State the names of the two different types of monomers that react together to form a polyester. For each type, give one example.

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  2. Question 2

    4 marks · Normal

    (a)

    Describe what is meant by condensation polymerisation in the formation of polyesters.

    [2 marks]
    (b)

    Draw the displayed formula for the repeat unit of a polyester made from ethane-1,2-diol and propane-1,3-dioic acid.

    [2 marks]
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  3. Question 3

    3 marks · Normal

    A polyester is formed from 10 molecules of butane-1,4-diol (HOCH2CH2CH2CH2OH) and 10 molecules of hexane-1,6-dioic acid (HOOCCH2CH2CH2CH2CH2COOH). Calculate the number of water molecules produced when these monomers react completely to form one long polyester chain.

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  4. Question 4

    3 marks · Normal

    Explain why a polyester molecule contains ester groups and describe how these groups are formed during polymerisation.

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  5. Question 5

    4 marks · Normal

    The table shows the properties of two polyesters.

    Properties of Polyesters A and B
    PolyesterMonomers UsedMelting Point / CTensile Strength
    Aethane-1,2-diol + benzene-1,4-dicarboxylic acid258High
    Bpropane-1,3-diol + benzene-1,4-dicarboxylic acid140Medium
    (a)

    State one similarity and one difference in the monomers used to make Polyesters A and B.

    [2 marks]
    (b)

    Using the data in the table, suggest a reason for the difference in melting point between Polyester A and Polyester B.

    [2 marks]
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  6. Question 6

    1 mark · Normal

    Which of the following statements about polyesters is correct?

    1. A.Polyesters are formed by addition polymerisation of alkenes.
    2. B.Polyesters are made from diols and dicarboxylic acids by condensation polymerisation.
    3. C.Only one type of monomer is needed to form a polyester.
    4. D.No water is lost when making a polyester.
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  7. Question 7

    2 marks · Normal

    Give one everyday use of polyesters and state one property of polyesters that makes them suitable for this use.

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  8. Question 8

    4 marks · Normal

    (a)

    Write a balanced chemical equation using structural formulae for the reaction between ethane-1,2-diol (HOCH2CH2OH) and butane-1,4-dioic acid (HOOCCH2CH2CH2COOH) to form a polyester and water.

    [2 marks]
    (b)

    Explain why the product formed is called a polyester.

    [2 marks]
    Answer and see the solution →