orgainc compounds with one or more carboxylic groups are
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Answer:
Carboxyl groups have the formula -C(=O)OH, usually written as -COOH or CO2H. Carboxylic acids are a class of molecules which are characterized by the presence of one carboxyl group.
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Explanation:
The functional group of ethyne is triple bond, of ethanol is −OH, of ethene is double bond, of methane is single bond. The functional group of acetic acid is −COOH which includes carbonyl group. Hence acetic acid is the answer
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