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
-
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
-
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
-
What small molecule is eliminated when a condensation polymer forms from a diacid and a diol?
- Hydrogen
- Methane
- Water
- Carbon dioxide
-
What linkage joins the repeating units in Kevlar?
- Ester linkage
- Amide (peptide-type) linkage
- Carbon-carbon single bond
- Ether linkage
-
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
-
Which repeat unit corresponds to nylon 6,6?
- -[OCH2CH2OCO-C6H4-CO]-
- -[CH2CH2]-
- -[NH(CH2)6NHCO(CH2)4CO]-
- -[NH(CH2)6CO]-
-
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
-
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
-
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
-
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
-
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
-
How many water molecules are released when one repeat unit of nylon 6,6 forms?
- 4
- 3
- 1
- 2
-
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
-
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
-
How many ester linkages are present in the repeat unit of Terylene?
- 4
- 2
- 3
- 1
-
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
-
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
-
Which linkage joins glycine units in a polypeptide?
- -CONH-
- -COO-
- -S-S-
- -CH2-
-
What is the relative molecular mass of the nylon 6,6 repeat unit, C12H22N2O2?
- 228
- 114
- 226
- 242
-
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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