Question 6

What is an homologous series? Explain with an example.


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

In a homologous series of alkane there is a difference of one carbon and 2 hydrogen unit between each successive member.

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