Question

in aniline electrophilic substitution occurs at ...... position​

Answer 1

Due to its various resonating structures, there's an excess of electron or negative charge over ortho- and para- positions of the benzene ring than the meta- position. Thus, anilines are o- and p- directive towards electrophilic substitution reaction.

Answer 2

Answer:

In aniline electrophilic substitution occurs at ortho and para positions.

Explanation:

In aniline, benzene ring is attached to -$NH_2$ group. It being an activating group increases the electron density of the ring majorly at ortho and para positions ( which can be shown by resonance). Electrophilic substitutions involve electrophiles which are electron-deficient groups so they search for more electrons. In aniline, more electrons are at ortho and para positions so electrophilic substitutions occur there.