Which one of the following compounds forms a | vedclass

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(D) The reaction of carboxylic acids with neutral $FeCl_3$ solution is a characteristic test for the presence of the carboxyl group. Acetic acid $(CH_

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$CH_3COOH$

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(D) The reaction of carboxylic acids with neutral $FeCl_3$ solution is a characteristic test for the presence of the carboxyl group. Acetic acid $(CH_3COOH)$ reacts with neutral $FeCl_3$ to form a deep red coloured complex of ferric acetate,$[Fe(OH)_2(CH_3COO)]_n$ or $[Fe(CH_3COO)_3]$. Other compounds listed,such as acetone $(CH_3COCH_3)$,dimethyl ether $(CH_3OCH_3)$,and ethanol $(CH_3CH_2OH)$,do not give this specific red colouration with neutral $FeCl_3$.

Which one of the following compounds forms a red coloured solution on treatment with neutral $FeCl_3$ solution?

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