The carboxyl functional group (-COOH) is pres | vedclass

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(D) The carboxyl functional group is represented as $-COOH$.$1$. Picric acid ($2,4,6$-trinitrophenol) contains a phenolic $-OH$ group and three nitro

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aspirin

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(D) The carboxyl functional group is represented as $-COOH$.$1$. Picric acid ($2,4,6$-trinitrophenol) contains a phenolic $-OH$ group and three nitro groups $(-NO_2)$,but no $-COOH$ group.$2$. Barbituric acid contains amide groups within a heterocyclic ring,but no $-COOH$ group.$3$. Ascorbic acid (Vitamin $C$) contains hydroxyl groups and a lactone ring,but no $-COOH$ group.$4$. Aspirin (acetylsalicylic acid) is $2$-acetoxybenzoic acid,which contains a benzene ring substituted with an acetoxy group $(-OCOCH_3)$ and a carboxylic acid group $(-COOH)$.Therefore,the correct option is $D$.

The carboxyl functional group $(-COOH)$ is present in

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