Question

calculate the oxidation number of Mn KMnO4
k (+1) o (+2)

Answer 1

oxidation no of kmnO4 in acidic region is 5, in neutral (less basic) is 3&in alkaline is 1

Answer 2

imagine mn=x
so
x+1(+1)+4(-2)=o
x=6-1
so mn oxidation no. is +5