Em tham khảo nha :
\(\begin{array}{l}
1)\\
2C{H_4} \xrightarrow{t^0} {C_2}{H_2} + 2{H_2}\\
2{C_2}{H_2} \xrightarrow{t^0,CuCl} {C_4}{H_4}\\
{C_4}{H_4} + {H_2} \xrightarrow{t^0,xt:Ni} {C_4}{H_6}\\
nC{H_2} = CH - CH = C{H_2} \to {( - C{H_2} - CH = CH - C{H_2} - )_n}\\
2)\\
Ca{C_2} + 2{H_2}O \xrightarrow{t^0} {C_2}{H_2} + Ca{(OH)_2}\\
{C_2}{H_2} + {H_2} \xrightarrow{t^0,xt:Pd} {C_2}{H_4}\\
{C_2}{H_4} + {H_2}O \xrightarrow{t^0} {C_2}{H_5}OH
\end{array}\)
