CAIE IGCSE Chemistry: Condensation Polymer Repeat Units Question Bank

Practise deducing polyamide and polyester repeat units or monomers from displayed functional groups and linkage patterns.

Exam points

draw diol, diamine or dicarboxylic acid monomers from a condensation polymer
complete polyester or polyamide sections with displayed ester or amide linkages
identify functional groups that form ester or amide linkages in monomers

[Maximum number: 4]

The chemical equation for the complete combustion of ethanol, $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}$ , is shown.

\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}+3 \mathrm{O}_{2} \rightarrow 2 \mathrm{CO}_{2}+3 \mathrm{H}_{2} \mathrm{O}

The energy released when one mole of ethanol undergoes complete combustion is 1280 kJ .
Part of the energy level diagram for this reaction is shown.

Figure for Question 11.8.8—Deduce the structure or repeat unit of question 1 — CAIE IGCSE Chemistry

(a)

Ethane-1,2-diol has the following structure.

Figure for Question (a) — CAIE IGCSE Chemistry

[ 4 ]

(i)

Ethane-1,2-diol undergoes condensation polymerisation with molecule $\mathbf{Y}$ .

The diagrams represent the structures of ethane-1,2-diol and molecule $\mathbf{Y}$ .

ethane-1,2-diol

molecule Y

Draw the condensation polymer formed between ethane-1,2-diol and molecule Y. Show one repeat unit. Show all of the atoms and all of the bonds in the linkage.

[ 3 ]

(ii)

Name the type of condensation polymer formed between ethane-1,2-diol and molecule Y.

[ 1 ]

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11.8.8—Deduce the structure or repeat unit of question 1

Question (a)

Question (i)

Question (ii)