Решите цепочку CO-CH3OH-CH3Br-C2H6-C2H5Cl-C2H5OH
CO2+ H2O=CH3OH CH3OH+Br2= CH3Br+ H2O CH3Br+Na= C2H6+ NaCl C2H6+Cl2=C2H5Cl+H2 C2H5Cl+H2O=C2H5OH+Hcl