Write the reaction equation, ethanol-ethylene-ethylene glycol

Let us write down the reaction equations for the transformation chain:
С2Н5ОН = Н2О + Н2С = СН2 – dehydration reaction, ethylene was formed;
Н2С = СН2 + Cl2 = H2C – Cl – CH2 – Cl – additions, dichrorethane was isolated;
2H2C – Cl – CH2 – Cl + 2KOH = 2CH2 (OH) – CH2 (OH) – exchange, ethylene glycol was obtained;
The reaction product – dihydric alcohol ethylene glycol is used as an additive to fuel in frosty weather, that is, it acts as an antifreeze. These reactions confirm the connection between primary monohydric alcohols, alkenes, diatomic alcohols-glycols.