Question

. What is meant by homologous series
? Write the first four members of
homologous series that begins with
A. CH CHO B, H-C=C-H .
Also write down their general molecular
formula.​

Answer 1

Answer:

Series of organic compounds, where the successive members members follow a regular structural pattern, successive compounds differ by 'CH2' group.

CH3-CHO is a member of aldehyde series. First 4 members of this series are -

H-CHO

CH3-CHO

CH3-CH2-CHO

CH3-CH2-CH2-CHO

CH≡CH is a member of alkynes series. First 4 members of this series are -

CH≡CH

CH≡C-CH3

CH≡C-CH2-CH3

CH≡C-CH2-CH2-CH3

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