Write the reaction equations: acetylene – benzene – chlorobenzene – phenol – sodium phenolate

Let us write down the reaction equations for the transformation chain:
3C2H2 = C6H6 – trimerization reaction, benzene was obtained;
С6Н6 + Сl2 = C6H5Cl + HCl – substitutions, chlorobenzene was isolated;
С6Н5Cl + KOH = C6H5 – OH + KCl – exchange, phenol was formed;
С6Н5 – ОН + NaOH = C6H5O – Na + H2O – exchange, sodium phenolate was obtained;
These reactions show the bond between alkynes, arenes, aromatic alcohols. The reaction products find practical applications, for example, benzene as an additive to motor fuel, phenol is used in the production of phenol-formaldehyde plastics.