When aniline forms 2,4,6- tribromo aniline on reaction with bromine water , it undergoes
When aniline forms 2,4,6- tribromo aniline on reaction with bromine water , it undergoes

1. nucleophilic addition
2. nucleophilic substitution
3. electrophilic substitution
4. electrophilic addition

Solution: electrophilic substitution

Bromination is the reaction that is taking place here (electrophilic aromatic substitution).
The NH2 group of aniline is ortho para directing, and it is highly activated. Tribromination will occur since it is highly active, and all two ortho positions and the para position will be brominated.
As a result, 2,4,6-tribromoaniline will be the end product.