Solved: CHEMISTRY Question for NEET

NEET CHEMISTRYMedium

The products formed when Aniline reacts with $Br_2$ water, and $NaNO_2/HCl$ will be, respectively:

p-Bromoaniline; p-Chloroaniline

2,4,6-Tribromoaniline; p-Chloroaniline

2,4,6-Tribromoaniline; Benzenediazonium chloride

p-Bromoaniline; Benzenediazonium chloride

Reaction with Bromine water: Aniline is highly reactive towards electrophilic aromatic substitution due to the strong activating effect (+R effect) of the $-NH_2$ group. When treated with bromine water, it undergoes rapid polyhalogenation to form a white precipitate of 2,4,6-tribromoaniline.
Reaction with Nitrous Acid ( $NaNO_2/HCl$ ): Primary aromatic amines like aniline react with nitrous acid (prepared in situ from sodium nitrite and mineral acid like $HCl$ ) at cold temperatures (273-278 K) to form benzenediazonium chloride. This important reaction is known as diazotisation.

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