Which of the following is soluble in aqueous sodium bicarbonate ?

Options

A.
B.
C.
D. Both (2) and (3)

Answer

D

Explanation

Unlike most phenols,`2,4`-dinitrophenol and `2,4,6`-trinitrophenol are soluble in aqueous sodium bicarbonate.Because of acid-strengthening nitro groups , the acidic strength of these phenols is high enough (`K_(a) values 10^(-4)` and "very large") to permit reaction with weakly basic `HCO_(3)^(-)`. Thus they liberate `CO_(2)` from `NaHCO_(3)`.