The major product formed on nitration of N, N-dimethylaniline with conc. H 2 S O 4 , H N O 3 mixture is

Step-by-step solution

Nitration of N,N-dimethyl aniline with conc. H 2 S O 4 , H N O 3 mixture give a mixture of meta and para isomers. In which meta isomer is the major product. In presence of strong acid H 2 S O 4 , - N ( C H 3 ) 2 group changes into - N + H ( C H 3 ) 2 by accepting proton so, it is a meta directing group.