Question

what is the oxi no. for kmno4 ?

Answer 1

Here oxidatin state of k is 1+
And O is 8- so oxidation state of mn is 7-

Answer 2

Oxidation number of K = +1, thus MnO4 = −1
Mn+4 O = −1
Mn+4(−2) = −1
Mn = +7