JEE Main 2024 — Aldehydes and Ketones Question with Solution

The reaction proceeds via addition of Grignard's reagent ($\mathrm{PhMgBr}$).

A Grignard reagent is an organomagnesium compound which can be described by the chemical formula ‘R-Mg-X’ where R refers to an alkyl or aryl group and X refers to a halogen.

When ${\mathrm{C}}_6{\mathrm{H}}_4\mathrm{CHOOH}$ reacts with grignard's reagent  benzene along with an addition product is formed, which on further reaction with aq ammonium chloride gives ${\mathrm{C}}_6{\mathrm{H}}_4\mathrm{CHOOH}$.

Here ${\mathrm{Ph}}^{-}$ is a strong base which is extracting proton  from the reactant to give benzene.

The reaction is as follows,

Product P is benzene and it has zero hydroxyl group.