Write the reaction equation: CH4- CH3CL- C2H6- C2H4- (- (bond) CH2 – CH2 -) n.

Let’s carry out the solution of the chain of transformations:
Methane – methane chloride – ethane – ethylene – polyethylene.

Let’s compose the equations of processes for organic substances:
CH4 + Cl2 = CH3Cl + HCl – substitutions, methane chloride was obtained;

CH3Cl + 2Na + CH3Cl = C2H6 + 2NaCl – ethane was formed during the Wurtz reaction;

C2H6 = H2 + H2C = CH2 – dehydrogenation, ethylene is released;

n H2C = CH2 = (-CH2 – CH2-) n – polymerization, polyethylene was obtained.

The decision confirms the connection between saturated, unsaturated hydrocarbons, polymers. The reaction products find practical applications, for example, polyethylene, are used as an insulator in electrical engineering.