Question

The oxidation state of chlorine in ClO2- is:

A) 0

B) +3

C) -3

D)+5

E) -5

Please explain! I dont understand the concept.

Answer 1

Answer is B

ClO^-1₂

let oxidation state of chlorin is   x

oxidation state of oxygen -2

      Net Charge is -1

solution:

                   x + 2(-2) = -1

             x -4= -1

            x= 4-1

         x = + 3

oxidation state of chlorine in ClO2- is: +3