Write the reaction equations: chloroethane benzene-nitrobenzene

Let us write down the reaction equations for organic substances:
C2H5Cl + KOH = C2H5OH + KCl – exchange reaction, ethanol was formed;
С2Н5ОН = Н2О + С2Н4 – dehydration, ethylene is released;
C2H4 = H2 + C2H2 – dehydrogenation, obtained acetylene;
3C2H2 = C6H6 – trimerization, benzene was obtained;
C6H6 + HO – NO2 = C6H5 – NO2 + H2O – nitration, nitrobenzene is formed.
These reactions show the connection of alcohols, alkenes, alkynes, arenes. The reaction products have practical applications, for example, ethanol as a solvent, nitrobenzene is used as a catalyst.

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