Verified answer

C + 2H2 = CH4 (t)

CH4 + Cl2 = CH3-Cl + HCl (hv)

CH3-Cl+ Cl2 = CH2Cl2 + HCl (hv)

CH2Cl2 + Cl2 = CHCl3 + HCl (hv)

CH4 + Cl2 = CH3Cl + HCl (hv)

CH3-Cl + 2Na+Cl-CH3 -> CH3-CH3 + 2NaCl

2C2H6 + 7O2 = 4CO2 + 6H2O