question_answer

The diazodzation of two feebly basic aromatic amines is achieved by using:

A)  nitrous acid

B)  nitrosyl-hydrochloric acid

C)  sulphuric acid

D)  nitrosoyl-sulphuric acid

Correct Answer: A

Solution :

                Aniline reacts with nitrous acid at\[{{0}^{o}}-{{5}^{o}}C\]to give benzene diazonium chloride. This reaction is called diazotisation. \[NaN{{O}_{2}}+HCl\xrightarrow{{}}HN{{O}_{2}}+NaCl\]