Bromobenzene is converted to a Grignard reagent with Mg in dry ether, which is then poured over solid CO2 and acidified with dilute HCl. The final organic product is

JEE Main levelSingle correct optionDifficulty 2 of 3hx155

Bromobenzene is converted to a Grignard reagent with $Mg$ in dry ether, which is then poured over solid $CO X_{2}$ and acidified with dilute $HCl$ . The final organic product is

C X_{6} H X_{5} Br + Mg C X_{6} H X_{5} MgBr

; the nucleophilic carbon adds to

CO X_{2}

to give

C X_{6} H X_{5} COOMgBr

, and aqueous acid liberates

C X_{6} H X_{5} COOH