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Plastics (SQA National 5 Chemistry): Exam Questions

Exam code: X813 75

2 mins2 questions
1
1 mark

Polymethylmethacrylate is a polymer used in the manufacture of aircraft windows. A section of the polymer chain is drawn below.

Chemical structure of triacetin molecule with three acetyl groups attached to a glycerol backbone, depicted with carbon, hydrogen, and oxygen atoms.

The monomer used to make this polymer is:

  • Structural formula of methyl methacrylate, showing carbon atoms connected with double and single bonds, methyl groups, and an ester functional group.
  • Chemical structure of vinyl acetate, showing a chain of carbon, hydrogen, and oxygen atoms with double bonds and a methyl group.
  • Chemical structure of isobutyl acetate with a main carbon chain, hydrogen atoms, and functional groups including a carbonyl (C=O) and an ester linkage.
  • Skeletal formula of butanone, showing a four-carbon chain with a double-bonded oxygen at the second carbon and a methyl group on the third carbon.

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2
1 mark

A co-polymer is formed when two different monomers polymerise.

Part of the structure of a co-polymer, showing three monomer units, is given below.

Structural formula of hexane showing six carbon atoms in a chain, with hydrogen atoms attached, representing a saturated hydrocarbon molecule.

One of the monomers used is propene.

Identify the other monomer.

  • Pent-2-ene

  • Pent-1-ene

  • But-2-ene

  • But-1-ene

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