Ncert Exercises & Solutions

Question 10.4:

Find the oxidation state of sodium in Na₂O₂.

Let the oxidation state of Na be x.

The oxidation state of oxygen, in case of peroxides, is –1.

Therefore,

2 (x) + 2 (- 1) = 0

2 x - 2 = 0

2 x = 2

x = + 1

Therefore, the oxidation sate of sodium is +1.