Question

Why water rise during the reaction (ethyne on oxidation with strong alkaline kmno4 gives glyoxal) and remove later on ?

Answer 1

Ethene on oxidation with cold alkaline KMnO

4

gives ethene glycol.

The balanced chemical equation is :

3CH

2

=CH

2

(g) + 2KMnO

4

(aq) + 4H

2

O (l) → 3CH

2

OHCH

2

OH (aq) + 2MnO

2

(s) + 2KOH (aq)