question_answer

Nitration of aniline also gives m-nitro aniline, in strong acidic medium because                                   [Kerala CET 2005]

A)                 In electrophilic substitution reaction amino group is meta directive

B)                 Inspite of substituents nitro group always goes to m- position

C)                 In strong acidic medium, nitration of aniline is a nucleophic substitution reaction

D)                 In strong acidic medium aniline present as anilinium ion

E)                 Strong acid, gives nitrate anion, which attacks at m-position

Correct Answer: D

Solution :

                                                    The reason for this is that, in acidic condition protonation of \[-N{{H}_{2}}\] group gives anilinium ion \[(+N{{H}_{3}})\], which is of deactivating nature and of m-directive nature.