Question

convert ethanol into benzene

Answer 1

We know first we have to prepare acetylene from ethanol. Each step of converting ethanol to benzene and acetylene to benzene is explained below.

ETHANOL TO ETHENE
Ethanol reacted with concentrated silphuric acid and heated to happen the reaction. Ethene is given as the product.

ETHENE TO DIBOROMETHANE
Liquid bromine is added to ethene. Br2 is dissolved in CCl4.Two bromine atoms are added to double bondand diboromethane is given as the product. Diboromethane is an alkyl halide compound .
Diboromethane - BrCH2CH2Br

DIBOROMETHANE TO ETHYNE
Alkyl halides are treated and heated with alcoholic KOH to give alkenes or alkynes ,when diboromethane is treated and heated with alcoholic KOH ethyne (acetylene )given .Acetylene is an alkyne.
Acetylene /ethyne/C2H2.

ETHYNE TO BENZENE
Ethyne (Acetylene ) is sent through a heated pipe.Acetylene polymerizes and give benzene as one product.

Answer 2

Benzene can be prepared by acetylene gas. When acetylene gas send through a heated pipe, benzene is be given as a one of the product. Before that we have to convert ethanol to acetylene