Question

write the structures of A and B in the following ​

Answer 1

Answer:

A is Benzene

B is nitrobenzene (ortho and para)

Explanation:

Ethyne is passed through a red hot iron tube at 873 K. The ethyne molecule then undergoes cyclic polymerization to form benzene.

Benzene is treated with a mixture of concentrated nitric acid and concentrated sulfuric acid at a temperature not exceeding 50°C,forms ortho and para nitrobenzene