| Date | May 2017 | Marks available | 2 | Reference code | 17M.3.hl.TZ1.9 |
| Level | HL | Paper | 3 | Time zone | TZ1 |
| Command term | Deduce | Question number | 9 | Adapted from | N/A |
Question
Antimony oxide is widely used as a homogeneous catalyst for the reaction of benzene-1,4-dicarboxylic acid with ethane-1,2-diol in the production of polyethylene terephthalate (PETE).
Deduce the repeating unit of the polymer and the other product of the reaction.
[2]
a.
State the class of polymer to which PETE belongs.
[1]
b.
Markscheme
Repeating unit:
Other product: water/H2O
Continuation bonds necessary for the mark.
Accept alternative repeating unit with O at other end.
Do not penalize square brackets or n.
[2 marks]
a.
condensation
Accept polyester or thermoplastic.
[1 mark]
b.
Examiners report
[N/A]
a.
[N/A]
b.
Syllabus sections
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