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Solution


Q.

Which of the following will not be soluble in sodium hydrogen carbonate        [2014]
1 2,4,6-Trinitrophenol  
2 Benzoic acid  
3 o-Nitrophenol  
4 Benzenesulphonic acid  

Ans.

(3)

The reaction is as follows :

Acid+NaHCO3 ⟶ Sodium salt of acid(soluble)+H2CO3

Among all the given compounds, o-nitrophenol is weaker acid than HCO3-. Hence, it does not react with NaHCO3.