Question

How to prepare benzene diazonium chloride from benzene?

Answer 1

First convert benzene to nitro benzene by reacting benzene with Cinc.HNO3 and conc H2SO4. Then reduce nitro benzene to aniline by adding H2,Pd, then add NaNO2+HCl to aniline it will convert to diazoniumchloride.
hope that helps

Answer 2

Answer:

Refer to the attachment given