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  4. What is the oxidation number of Br in KBrO4 ?

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Q. What is the oxidation number of $Br$ in $KBrO_4$ ?

AIIMSAIIMS 2014Redox Reactions

Solution:

Let the oxidation no. of Br be x.
In KBrO4, + 1 + x + 4 (-2) = 0, - 7 + x = 0, x = + 7