Здыйснити перетворення! C2H2-C6H6-C6H5Cl-C6H5OH-C6H2Br3OH
1) 3C2H2=C6H6 2)C6H6+Cl2=C6H5Cl + HCl 3)C6H5Cl+NaOH=C6H5OH+NaCl 4)C6H5OH+3Br2=C6H2Br3OH+3HBr