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Q. The oxidation state of chlorine in $ KClO_{4} $ is

AMUAMU 2007

Solution:

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