Which of the following does not give efferves | vedclass

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Question

(A) Sodium bicarbonate $(NaHCO_3)$ reacts with acids that are stronger than carbonic acid $(H_2CO_3)$ to release $CO_2$ gas,which causes effervescence

Vedclass · Accepted Answer

Phenol

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(A) Sodium bicarbonate $(NaHCO_3)$ reacts with acids that are stronger than carbonic acid $(H_2CO_3)$ to release $CO_2$ gas,which causes effervescence.Phenol has a $pK_a$ value of approximately $10$,which is much higher than that of carbonic acid $(pK_a \approx 6.35)$,meaning phenol is a weaker acid and does not react with $NaHCO_3$.Benzoic acid,$2, 4-$dinitrophenol,and $2, 4, 6-$trinitrophenol (picric acid) are stronger acids than carbonic acid due to the electron-withdrawing effects of the substituents,and thus they all give effervescence with $NaHCO_3$.

Which of the following does not give effervescence with $NaHCO_3$?

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