Ответ:1) CH4 + Cl2 → CH3Cl + HCl2) 2CH3Cl + 2Na → CH3CH3 + 2NaCl3) CH3CH3 → C2H4 + H24) 3C2H4 → C6H6 + 3H25) C6H6 + Cl2 → C6H5Cl + HCl