Question

When Aniline is treated with Nitrous acid, which is prepared

in situ

from Sodium Nitrite and mineral acid, the product formed is:

$C_6{H}_{5}N{H}_2+HCl+NaN{O}_2\to$ _____________ + $2H_{2}O$

• A. Chloro benzene
• B. Benzene diazonium chloride
• C. both A and B
• D. None

Answer 1

The correct option is B Benzene diazonium chloride

Aniline on reaction with nitrous acid gives Benzene diazonium chloride. This is a very important precursor to manufacturing dyes and other essential compounds. Of course, in the following we haven’t shown the water molecule which was given as part of the question:

As mentioned in the question, $HN{O}_2$ is prepared in situ from Sodium Nitrite and Hydrochloric acid (any good mineral acid). In the above reaction, the product is called Benzene diazonium chloride