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CAIE IGCSE Chemistry 11.8.8 Deduce the structure or repeat unit of

CAIE IGCSE Chemistry 11.8.8 Deduce the structure or repeat unit of
Cambridge IGCSE Chemistry 0620 syllabus for exams in 2026, 2027 and 20282026–2028

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

How this is tested

  • 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

Question 6(d)(ii)

[Maximum number: 2]

Carboxylic acids can be converted to esters.

PET is a polyester. Part of the structure of PET is shown in Fig. 6.1.

Fig. 6.1

Fig. 6.1

Draw the structures of the monomers which make up PET . Draw the functional groups using displayed formulae.