Al4c3-ch3br2-c2h6-c2h4-c2h5cl-c4h10.
Al4C3+12HCl=4AlCl3+3CH4 CH4+Br2=CH3Br+HBr 2CH3Br+2Na=C2H6+2NaBr C2H6=C2H4+H2 C2H4+HCl=C2H5Cl 2C2H5Cl+2Na=2NaCl+C4H10