Write the reaction equation: C2H2- C6H6- C6H5NO2- C6H5NH2 Give the names of all substances

Let’s write down the equations for organic substances:
3C2H2 = C6H6 – trimerization reaction, benzene was obtained;
C6H6 + HO – NO2 = C6H5 – NO2 – nitration reaction, occurs when heated in the presence of concentrated sulfuric acid, nitrobenzene is formed;
С6Н5NO2 + 3H2 = C6H5NH2 + 2H2O – reduction of nitrobenzene, aniline (phenylamine) was obtained;
The reaction products are of practical importance. Benzene is used as an additive in motor fuel for combustion, nitrobenzene is used as a solvent, and aniline is the basis in the aniline paint industry. These reactions confirm the connection between arenes, nitro-containing organic compounds, and amines.