The compound that does not liberate $C O_{2}$ , on treatment with aqueous sodium bicarbonate solution, is:

benzoic acid

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benzenesulphonic acid

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salicylic acid

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carbolic acid (phenol)

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Solution

The correct option is C carbolic acid (phenol)
Benzoic acid and benzene sulphonic acid are stronger acids so liberate $C O_{2}$

$p K_{a}$ of $P h O H$ (carbolic acid) is 9.98 and that of carbonic acid $(H_{2} C O_{3})$ is 6.63 thus phenol does not give effervescence with $H C O_{3}^{-}$ ion.

Hence, answer is option $D$

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The compound that does not liberate $C O_{2}$ , on treatment with aqueous sodium bicarbonate solution, is

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