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

Options

(a) 2,4,6-Trinitrophenol
(b) Benzoic acid
(c) o-Nitrophenol
(d) Benzenesulphonic acid

Correct Answer:

o-Nitrophenol

Explanation:

o-nitrophenol will not be soluble in NaHCO₃. Due to intramolecular hydrogen bonding hydrogen on OH is strongly bond. So it can not be have as an acid and can not react with sodium bicarbonate.