Write down the reaction equations CaO → CaC2 → C2H2 → C2H3Cl → (–CHCl – CH2–) n.

Let’s carry out the solution of the chain of transformations:
1. СaO + 3C = CaC2 + CO – OBP, calcium carbide was obtained;
2. CaC2 + 2H2O = C2H2 + Ca (OH) 2 – hydration, ethin is released;
3. С2Н2 + HCl = Н2C = CHCl (C2H3Cl) – addition, vinyl chloride was formed;
4.n (H2C = CHCl) = (- CH2 – CHCl -) n – polymerization, polyvinyl chloride is obtained.
The solution process confirms the connection of inorganic substances by the example of calcium oxide and organic – polymer, polyvinyl chloride. The reaction products find practical applications, for example, PVC (polyvinyl chloride) is the basis in the production of rubber.