Q.

Which of the following will not be soluble in sodium hydrogen carbonate?

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a

2,4,6 - Trinitrophenol

b

Benzoic acid

c

O - Nitrophenol

d

Benzenesulphonic acid

answer is C.

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Detailed Solution

The reaction is as follows:  Acid +NaHCO3⟶ Sodium salt of acid(soluble) +H2CO3Among all the given compounds, o-nitrophenol is weaker acid than HCO3-. Hence, it does not react with NaHCO3.
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Which of the following will not be soluble in sodium hydrogen carbonate?