A) 2, 4, 6 - Trinitrophenol
B) Benzoic acid
C) o-Nitrophenol
D) Benzenesulphonic acid
Acid reacts with sodium hydrogen carbonate as follows : $$ Acid +NaHCO₃ → Sodium salt of acid +CO₂↑ +H₂O $$
Among all the given options ortho-nitrophenol is weaker acid than $\mathrm{HCO}_3^-$ hence, it does not react with $\mathrm{NaHCO}_3$.
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