\(C_4H_8 + H_2 \xrightarrow{t^o,Ni} C_4H_{10}\\ C_4H_{10}\xrightarrow{t^o,Ni} CH_4 + C_3H_6\\ 2CH_4 \xrightarrow{lln,1500^oc}C_2H_2 + 3H_2\\ 2C_2H_2 \xrightarrow{t^o,p,xt} C_4H_4\\ C_2H_2 + 2AgNO_3 + 2NH_3 \to C_2Ag_2 + 2NH_4NO_3\\ C_2H_2 + H_2\xrightarrow{t^o,PbCO_3} C_2H_4\)