b. $C_2H_5COONa+NaOH\rightarrow Na_2CO_3+C_2H_6$
$C_2H_6\overset{t^0}{\rightarrow}CH_2=CH_2+H_2$
$3CH_2=CH_2+2KMnO_4+4H_2O \rightarrow$ $3C_2H_4(OH)_2+2MnO_2+2KOH$
$C_2H_5Cl+NaOH\overset{t^0}{\rightarrow}C_2H_5OH+NaCl$
$C_2H_4+HCl\rightarrow C_2H_5Cl$