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What is a Homologous Series? - Science and Technology 2

What is a homologous series?

What is a homologous series? Explain with an example.

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Solution 1

Homologous series is a group of organic compounds with a similar structure and similar chemical properties in which the successive compounds differ by a CH2 group.

Solution 2

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.

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NCERT Class 10 Science Textbook
Chapter 4 Carbon and its Compounds
Q 6 | Page 78
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