Q 12.14 How will you prepare the following compounds from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom
(iii) p-nitrobenzoic acid
By friedel craft alkylation of benzene give methyl benzene, which on nitration give meta and para substituted methyl benzene, para substituted is major product. Oxidation of para substituted methyl benzene() gives salts of carboxylic acid, which on further acidic hydrolysis gives p-nitrobenzoic acid.