CH4→CH3Cl→C2H6→C2H5Cl→C3H8;
1)CH₄+Cl₂-->(свет) CH₃Cl+HCl 2)2CH₃Cl+2Na-->2NaCl+CH₃-CH₃ 3)CH₃-CH₃+Cl₂-->(свет) CH₃-CH₂Cl+HCl 4)CH₃-CH₂Cl+CH₃Cl+2Na-->2NaCl+CH₃-CH₂-CH₃