Question

Consider the following reaction sequence ${CH}_2={CH}_2\underset{dil.KMn{O}_4}{\overset{cold}{\to }}A\underset{PC{I}_s}{\overset{excess}{\to }}B$. The products (A) and (B) are, respectively:

Answer 1

${CH}_2={CH}_2\underset{dil.KMn{O}_4}{\overset{cold}{\to }}$ Ethylene Glycol $\underset{P{Cl}_5}{\overset{excess}{\to }}$ 1,2 dichloroethane

thus,

Here $A$ is ethylene glycol $HO-C{H}_2-C{H}_2-OH$

and $B$ is 1,2-Dichloroethane $Cl-C{H}_2-C{H}_2-Cl$