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Q.
$o- $Toluic acid on reaction with $Br _{2}+ Fe$ gives
AIIMSAIIMS 2004Aldehydes Ketones and Carboxylic Acids
Solution:
When $o$-toluic acid is treated with $Br _{2} / Fe$, electrophilic substitution take place. - $CH _{3}$ group is $o$-and -$p$ directing, while $- COOH$ is $m$-directing. Hence, $5$-bromo-$2$-methyl benzoic acid is obtained.
