Question

The oxidation number of Mn in KMnO₄ is
(a) + 7 (b) – 7
(c) + 1 (d) – 1

Answer 1

Answer:

(a) + 7

Explanation:

The oxidation number of manganese in KMnO4 is +7. Potassium ions have a +1 oxidation number.

This can be obtained by taking into account the valencies of potassium and oxygen atoms. The valency of K is 1 but it loses electron so to be specific it is +1. Similarly oxygen in specific has a valency of -2.

Answer 2

answer=6

Explanation:

let it be x

x+( 2)+(-2)4=0

x+2-8=0

x=6