Question

Number of compounds from the following which will not dissolve in cold $NaHCO _3$ and $NaOH$ solutions but will dissolve in hot $NaOH$ solution is______

Answer 1

The correct answer is 3
Compound 2,3,7
Carboxylic acid group compound soluble in NaOH & NaHCO3 & phenol group containing groups reacts with NaOH
⇒ esters get dissolved in NaOH by hydrolysis