Цепочка превращений ch4→ch3cl→c2h6→c2h4⇄c2h5oh+[o]=? c2h4→c2h5cl c2h4→c2h4br2

1. 1) CH4 + Cl2 -(hv)-> CH3Cl + HCl
2) 2CH3Cl + 2Na --> C2H6 + 2NaCl
3) C2H6 -(Ni)-> C2H4 + H2 
4) C2H4 + H2O -(H2SO4)-> C2H5OH
5) C2H5OH + [O] -> CH3CHO + H2O
2. 1) C2H4 + HCl -> C2H5Cl
3. 1) C2H4 + Br2 -(CCl4)-> C2H4Br2 
В скобочках указаны катализаторы