Lesson 3.3.12.1

3.3.12.1 Condensation polymers Quiz: AQA Chemistry, Unit 3

20 questions

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Lesson 3.3.12.1, Condensation polymers: 20 multiple choice questions for the AQA Chemistry (7405), Unit 3: Organic chemistry, written with Revision Ninja.

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The 20 questions

  1. Which pair of monomers forms a polyester?

    • A dicarboxylic acid and a diol
    • A diamine and an alkene
    • Two alkenes
    • A carboxylic acid and an alkane

  2. Which two monomers are used to make nylon 6,6?

    • Benzene-1,4-dicarboxylic acid and ethanol
    • Ethene and hexene
    • Hexanedioic acid and 1,6-diaminohexane
    • Ethane-1,2-diol and ethanoic acid

  3. What small molecule is eliminated when a condensation polymer forms from a diacid and a diol?

    • Hydrogen
    • Methane
    • Water
    • Carbon dioxide

  4. What linkage joins the repeating units in Kevlar?

    • Ester linkage
    • Amide (peptide-type) linkage
    • Carbon-carbon single bond
    • Ether linkage

  5. What monomers are used to make Terylene?

    • Benzene-1,4-dicarboxylic acid and ethane-1,2-diol
    • Hexanedioic acid and 1,6-diaminohexane, the monomers of the polyamide nylon 6,6
    • Ethene and propene, the monomers of an addition polymer made by free-radical reactions
    • Benzene-1,4-dicarboxylic acid and ethane-1,2-diol, the monomers of this polyester

  6. Which repeat unit corresponds to nylon 6,6?

    • -[OCH2CH2OCO-C6H4-CO]-
    • -[CH2CH2]-
    • -[NH(CH2)6NHCO(CH2)4CO]-
    • -[NH(CH2)6CO]-

  7. Which monomers link to form a polypeptide from amino acids?

    • Amino acids linked by ionic bonds only
    • Amino acids linked by ester bonds only
    • Amino acids linked by amide (peptide) bonds
    • Amino acids linked by C=C double bonds

  8. Which intermolecular forces are most important between nylon 6,6 chains?

    • Metallic bonding between chains
    • Covalent cross-links between carbon atoms
    • Hydrogen bonding between N-H and C=O groups
    • Only van der Waals forces between CH2 groups

  9. Which two monomers, when joined, would form a polyamide?

    • Two alkenes
    • A diol and a diol
    • A dicarboxylic acid and an alkane
    • A dicarboxylic acid and a diamine

  10. A section of polyamide shows -NH-CO- linkages. Which monomers could have produced it?

    • Two alkenes, which add together to form an addition polymer with no small by-product
    • A diol and a dicarboxylic acid, which form a polyester by condensation of ester links
    • A diamine and a dicarboxylic acid, or an amino acid
    • A halogenoalkane and an alkene, which form a polymer by substitution of the halogen

  11. Which intermolecular forces dominate between polyester chains?

    • Ionic attractions between chains, which arise from charges on the ester groups
    • Metallic bonding between the polymer chains, which holds the chains together firmly
    • Only hydrogen bonding between chains, formed by the O-H groups along the polymer
    • Permanent dipole-dipole attractions between ester groups, plus van der Waals forces

  12. How many water molecules are released when one repeat unit of nylon 6,6 forms?

    • 4
    • 3
    • 1
    • 2

  13. Two amino acids condense to form which products?

    • Two amino acids and carbon dioxide
    • A dipeptide and water
    • A polyester and hydrogen
    • A carboxylic acid and an amine salt

  14. Why does nylon 6,6 have a higher melting point than polyethene of similar chain length?

    • Polyethene contains more hydrogen bonds per repeat unit, which is why its melting point is higher
    • Nylon 6,6 contains metallic bonds that hold its chains together much more strongly than covalent links
    • Hydrogen bonding and dipole interactions between amide groups are stronger than van der Waals forces between alkane chains
    • Covalent bonds between the amide groups are much stronger than the van der Waals forces in alkane chains

  15. How many ester linkages are present in the repeat unit of Terylene?

    • 4
    • 2
    • 3
    • 1

  16. Why are equimolar amounts of a dicarboxylic acid and a diamine used to make nylon 6,6?

    • To produce a cyclic monomer that closes into a ring before the polymer chain grows
    • To stop water being released, so that the polymer forms without any by-product at all
    • To produce long linear chains with high molecular mass
    • To make the polymer cross-linked and rigid, so that it cannot be easily reshaped later

  17. What is the repeating unit of a polymer made from a dicarboxylic acid and a diol?

    • A section containing one diacid and one diol linked by ester groups
    • A single ethene unit, which forms the repeat in the addition polymer polyethene
    • A chlorinated alkene unit, which forms the repeat in PVC by addition polymerisation
    • A single amino acid only, which links to the next unit by a peptide bond in the chain

  18. Which linkage joins glycine units in a polypeptide?

    • -CONH-
    • -COO-
    • -S-S-
    • -CH2-

  19. What is the relative molecular mass of the nylon 6,6 repeat unit, C12H22N2O2?

    • 228
    • 114
    • 226
    • 242

  20. Which condition helps a condensation polymer reach high molecular mass?

    • Removal of all ester groups, which makes the polymer more flexible and easy to shape
    • Equal molar amounts of the two monomers with water removed as it forms
    • A large excess of one monomer, which ensures every chain end reacts with the same unit
    • Adding a free-radical initiator, which starts the chain growth at many points at once

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