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Question
Name the functional group which always occurs in the middle of a carbon chain.
Solution
The functional group which always occurs in the middle of the carbon chain is the ketone group (-CO-). In a ketone, a carbon atom is bonded to one oxygen through a double bond. The two remaining free electrons in the carbon atom are shared with two different alkyl groups. This is why the -CO- group always occurs in the middle of the carbon chain.
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