Question

The oxidation number of oxygen in $K{O}_3,N{a}_2{O}_2$ is

• A. 3, 2
• B. 1, 0
• C. 0, 1
• D. -0.33, -1

Answer 1

Answer: (D)

$K{O}_3$
Suppose O.N. of $O=x$
$+1+3x=0$
$3x=-1$
$x=-\frac{1}{3}$
$x=-0.33$

$N{a}_2{O}_2$
Suppose O.N. of $O=x$
$2\times 1+2x=0$
$2+2x=0$
$2x=-2$
$x=-\frac{2}{2}$
$x=-1$