CH4-CH3CL-C2H6-C2H4-C2H5CL-C4H10-CO2
1) CH4+Cl2⇒CH3Cl+HCL
2)2CH3Cl+2Na⇒2NaCl+C2H6
3)C2H6-H2⇒C2H4
4)C2H4+HCl⇒C2H5Cl
5)2C2H5Cl+2Na⇒2NaCl+C4H10
6)2C4H10+13O2⇒10H2O+8CO2