Question

In the chemical reactions :
the compounds A and B respectively are :
(a) benzene diazonium chloride and benzonitrile
(b) nitrobenzene and chlorobenzene
(c) phenol and bromobenzene
(d) fluorobenzene and phenol

Answer 1

Answer:

Where are your given reactions

Answer 2

The compounds A and B respectively are benzene diazonium chloride and benzonitrile.

Option (A) is correct.

Explanation:

The reaction is:

Aniline + NaNO2/ HCl/278 K--->Benzene dizonium chloride ---> Benzonitrile

• In this reaction, aniline is diazotized to obtain benzene diazonium chloride (compound A)
• Aniline is heated in the presence of NaNO2 and HCl. The temperature of the reaction is 278 K.
• In the forst step benzene diazonium chloride is obtained which is further heated in the presence of CuCN to obtain benzonitrile.
• The diazonium group of benzene diazonium chloride is then replaced with cyano group by sandmeyer reaction.

Thus, the compounds A and B respectively are benzene diazonium chloride and benzonitrile.

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