c2h2→ch3-ch2-oh→ch3-ch2-cL→ch2=ch2→ch3-ch3→co2

C2h2+h20->ch3-ch2-ohCh3-ch2-oh+hcl->ch3-ch2-cl+h2oCh3-ch2-cl+koh->kcl+ch2=ch2+h2oCh2-ch2+h2->ch3-ch32Ch3-ch3+7o2->4CO2+6h20