Question

C2H2<-- CH4 -->CH3CL-->C2H6-->C2H4

Answer 1

2CH₄ ---> C₂H₂ + 3H₂ (t)
CH₄ + Cl₂ ---> CH₃Cl + HCl (hv)
2CH₃Cl + 2Na ---> C₂H₆ + 2NaCl
C₂H₆ --> C₂H₄ + H₂ (kt=Ni,t)