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Question: Answered & Verified by Expert
What is the oxidation number of $\mathrm{Br}$ in $\mathrm{KBrO}_4$ ?
ChemistryRedox ReactionsAIIMSAIIMS 2014
Options:
  • A $+6$
  • B $+7$
  • C $+5$
  • D $+8$
Solution:
1712 Upvotes Verified Answer
The correct answer is: $+7$
Let the oxidation no. of $\mathrm{Br}$ be $x$.
$\begin{aligned} \text { In } \mathrm{KBrO}_4+1+x+4(-2) & =0,-7+x=0 \\ x & =+7\end{aligned}$

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