Question

What is the oxidation state of nitrogen in NaNO2?

1) +1
2) +2
3) +3
4) +4

Answer 1

Na-->+1
O2-->2x(-2)=-4
let the oxidation no. of N be s.
this compound is neutral overall,therefore
1+(-4)+s=0 ----> s=+3
+3 is the correct answer