\(\begin{array}{l}
b)\\
{C_2}{H_4} + B{r_2} \to {C_2}{H_4}B{r_2}\\
{C_2}{H_4} + {H_2}O \to {C_2}{H_5}OH\\
2{C_2}{H_5}OH + 2K \to 2{C_2}{H_5}OK + {H_2}\\
{C_2}{H_5}OH + {O_2} \to C{H_3}COOH + {H_2}O\\
c)\\
{C_6}{H_{12}}{O_6} \to 2{C_2}{H_5}OH + 2C{O_2}\\
{C_2}{H_5}OH + {O_2} \to C{H_3}COOH + {H_2}O\\
d)\\
{C_2}{H_4} + {H_2}O \to {C_2}{H_5}OH\\
nC{H_2} = C{H_2} \to {( - C{H_2} - C{H_2})_n}
\end{array}\)

b,

$C_2H_4+H_2O\buildrel{{H^+}}\over\to C_2H_5OH$

$C_2H_5OH+O_2\buildrel{{men}}\over\to CH_3COOH+H_2O$

$C_2H_4+Br_2\to C_2H_4Br_2$

$2C_2H_5OH+2K\to 2C_2H_5OK+H_2$

c,

$C_6H_{12}O_6\buildrel{{\text{men}}}\over\to 2CO_2+2C_2H_5OH$

$C_2H_5OH+O_2\buildrel{{men}}\over\to CH_3COOH+H_2O$

d,

$C_2H_4+H_2O\buildrel{{H^+}}\over\to C_2H_5OH$

$nC_2H_4\to (-CH_2-CH_2-)_n$