${C_2}{H_2}\xrightarrow[{HgS{O_4}/{H_2}S{O_4},60{\,^o}C}]{{{H_2}O}}X \rightleftharpoons C{H_3}CHO$
$\mathop A\limits_{(alkene)} \xrightarrow[{{H_2}O}]{{RC{O_3}H}}$ રેસેમિક મિશ્રણ
$\mathop A\limits_{(alkene)} \xrightarrow{{Cold\,dil.KMn{O_4}}}$ મેસો સંયોજન
$C{H_3}C \equiv \,C\,C{H_2}C{H_3}\mathop {\xrightarrow[{(2)\;Hydrolysis}]{}}\limits^{(1)\;\;{O_3}} $ .......