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CAIE IGCSE Chemistry General Formulae of Homologous Series

CAIE IGCSE Chemistry General Formulae of Homologous Series
Cambridge IGCSE Chemistry 0620 syllabus for exams in 2026, 2027 and 20282026–2028

Practise recalling and applying general formulae for alkanes, alkenes, alcohols and carboxylic acids to identify series or calculate member formulae.

How this is tested

  • recall the general formulae for alkanes and alkenes and substitute the stated carbon number
  • apply the alcohol and carboxylic-acid general formulae without dropping the functional group
  • derive or recognise a homologous-series formula from several molecular formulae in a table

Question 7(d)(i)

[Maximum number: 1]

Many organic compounds contain carbon and hydrogen only.

State the general formula for alcohols.