Question

Which of the following method is used to prepare Ethylene glycol from ethene?
A Dehydration
B Hydroxylation
C Hydration
D Luca's test​

Answer 1

Answer:

xidized to ethylene oxide

Explanation:

In the industrial preparation of ethylene glycol, ethylene (IUPAC name: ethene) is oxidized to ethylene oxide (IUPAC name: oxirane) using oxygen and a silver catalyst. Ethylene oxide is then reacted with water at high temperature or in the presence of an acid catalyst to produce ethylene glycol.

Answer 2

The method used to prepare ethylene glycol from ethene is hydroxylation. Thus, the correct option is B.

Explanation:

• When ethene is subjected to hydroxylation in the presence of cold and dilute alkaline potassium permanganate solution ($\[alc.\,KMn{O_4}\]$), the addition of hydroxide ions takes place across the double bond of ethene.
• It results in the formation of ethylene glycol.
• The reaction can be given as: $\[C{H_2} = C{H_2}\xrightarrow{{Cold\,and\,dilute\,alkaline\,KMn{O_4}}}C{H_2}(OH) - C{H_2}(OH)\]$