(1) $2C{H_4}\xrightarrow[{lamlanhnhanh}]{{{{1500}^o}C}}CH \equiv CH + 3{H_2}$
(2) $3CH \equiv CH\xrightarrow[C]{{{{600}^o}C}}{C_6}{H_6}$
(3) ${C_6}{H_6} + C{l_2}\xrightarrow[{}]{{Fe,{t^o}}}{C_6}{H_5}Cl + HCl$
(4) $CH \equiv CH + HCl\xrightarrow[{}]{{HgC{l_2},{t^o}}}C{H_2} = CHCl$
(5) $nC{H_2} = CHCl\xrightarrow{{{t^o},p,xt}}{\left( { - C{H_2} - CHCl - } \right)_n}$
(6) $2CH \equiv CH\xrightarrow{{N{H_4}Cl,CuC{l_2},{{100}^o}C}}CH \equiv C - CH = C{H_2}$
(7) $CH \equiv C - CH = C{H_2} + {H_2}\xrightarrow[{{t^o}}]{{Pd/PbC{O_3}}}C{H_2} = C - CH = C{H_2}$
(8) $CH \equiv CH + {H_2}\xrightarrow[{{t^o}}]{{Pd/PbC{O_3}}}C{H_2} = C{H_2}$
(9) $C{H_2} = C{H_2} + {H_2}\xrightarrow{{Ni,{t^o}}}C{H_3} - C{H_3}$
(10) $C{H_3} - C{H_3} + C{l_2}\xrightarrow{{as}}C{H_3} - C{H_2}Cl + HCl$
(11) $nC{H_2} = C - CH = C{H_2}\xrightarrow{{{t^o},p,xt}}{\left( { - C{H_2} - C = CH - C{H_2} - } \right)_n}$
