Question

The oxidation state of chlorine in $KCl{O}_4$ is

• A. - 1
• B. + 1
• C. + 7
• D. - 7

Answer 1

Answer: (C)

Let the oxidation state of $Cl$ is $x$.
$KCl{O}_4$
$1+x+4(-2)=0$
$1+x-8=0$
$x-7=0$
$x=+7$