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CAIE IGCSE Chemistry Functional Groups and Homologous Series

CAIE IGCSE Chemistry Functional Groups and Homologous Series
Cambridge IGCSE Chemistry 0620 syllabus for exams in 2026, 2027 and 20282026–2028

Practise defining a functional group and recognising carbon-carbon double bonds, hydroxyl and carboxyl groups from structures and chemical tests.

How this is tested

  • define a functional group as the atom or group that determines characteristic chemical properties
  • identify carbon-carbon double bond, hydroxyl and carboxyl groups in a displayed structure
  • use bromine-water or carbonate observations to confirm alkene or carboxylic-acid behaviour

Question 6(a)(ii)

[Maximum number: 1]

The names of four esters are listed.
> methyl propanoate ethyl propanoate propyl propanoate butyl propanoate

Esters are a family of organic compounds with similar chemical properties. They can be represented by the formula CnH2nO2\mathrm{C}_{n} \mathrm{H}_{2 n} \mathrm{O}_{2}.

Explain why members of a family of organic compounds have similar chemical properties.