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Question
Write a note on homologous series.
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Solution
A series of organic compounds each containing a characteric functional group and the successive members differ from each other in a molecular formula by a CH2 group is called homologous series.
Example:
- Alkanes:
Methane (CH4), Ethane (C2H6), Propane (C3H8) etc.. - Alcohols:
Methanol (CH3OH), Ethanol (C2H5OH) Propanol (C3H7OH) etc…
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\[\begin{array}{cc}
\ce{CH3}\phantom{..................}\\
|\phantom{....................}\\
\ce{CH3 - C - CH - CH2 - CH2 - CH3}\\
|\phantom{....}|\phantom{................}\\
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