1) CH4 + Br2 --t-> CH3Br + HBr
2) CH3Br + 2Na > C2H6 + 2NaBr
3) С2H6 --t,Ni--> C2H4 + H2
4) C2H4 > [-H2C-CH2-]n
1) CH4 + Br2 --t-> CH3Br + HBr
2) CH3Br + 2Na > C2H6 + 2NaBr
3) С2H6 --t,Ni--> C2H4 + H2
4) C2H4 > [-H2C-CH2-]n