question_answer

Which of the following will not be soluble in sodium hydrogen carbonate?  [AIPMT 2014]

A)  2, 4, 6-trinitrophenol

B)  Benzoic acid

C)  o-nitrophenol      

D)  Benzenesulphonic acid

Correct Answer: C

Solution :

While 2, 4, 6-trinitrophenol, benzoic acid and benzene sulphonic acid are soluble in \[NaHC{{O}_{3}}\]. This reaction is possible in forward direction if acid is more acidic than\[{{H}_{2}}C{{O}_{3}}\]. O-nitrophenol is less acidic than\[{{H}_{2}}C{{O}_{3}}\]. Hence, it is not soluble in sodium hydrogen carbonate.