Question

Determine oxidation number of all the atoms in well known oridation in KMnO4​

Answer 1

Solution

Let the Ox.no. of Mn in KMnO4 be x.

We know that, OX.no. of K=+1

Ox.no. of O=−2

So, Ox. no. K+ Ox. no. Mn + 4(Ox.no.O)=0

or +1+x+4(−2)=0

or +1+x−8=0

or x=+8−1=+7

Hence, Ox.no. of Mn in KMnO4  is +7.