Chuỗi 1:
$(1)\quad 2CH_4\xrightarrow[\text{làm lạnh nhanh}]{1500^\circ} C_2H_2+ 2H_2$
$(2)\quad 2C_2H_2\xrightarrow{150^\circ,\,CuCl} C_4H_4$
$(3)\quad C_4H_4 + H_2\xrightarrow{t^\circ, \,Ni} C_4H_6$
$(4)\quad nCH_2=CH-CH=CH_2 \xrightarrow{t^\circ,\,p,\,Na} -\kern-5.5pt ( \,CH_2-CH=CH-CH_2\, )\kern-5.5pt -_n$
Chuỗi 2:
$(1)$ Không thể điều chế trực tiếp $CH_4$ từ $CaC_2$
$(2)\quad 2CH_4\xrightarrow[\text{làm lạnh nhanh}]{1500^\circ} C_2H_2+ 2H_2$
$(3)\quad C_2H_2+ H_2\xrightarrow{t^\circ, \, Pd/PbCO_3} C_2H_4$
$(4)\quad C_2H_4 + H_2O \xrightarrow{{H_2SO_4}_{(l)}} C_2H_5OH$
