Question

what is homologous series ? explain with an example

Answer 1

A homologous series is a series of carbon compounds that have different numbers of carbon atoms but contain the same functional group.
For example, methane, ethane, propane, butane, etc. are all part of the alkane homologous series.

The general formula of this series is CnH2n+2.
Methane CH4
Ethane CH3CH3
Propane CH3CH2CH3
Butane CH3CH2CH2CH3
It can be noticed that there is a difference of −CH2 unit between each successive compound.

Answer 2

DEFINATION - series of organic compounds where successive members follow a regular structural pattern , successive members differ by a -CH2 group.

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EXAMPLE -

ALKANES -

CH4 - methane
C2H6 - ethane
C3H8 - propane
C4H10 - butane
C5H12 - Pentane
C6H14 - hexane
C7H16 - heptane
C8H18 - octane
C9H20 - nonane
C10H22 - decane