JEE Advanced Chemistry question

In the conversion of BrO3⁻ to BrO4⁻

(A)There is no change in oxidation number
(B)Reduction takes place in basic solution
(C)Reaction also takes place by XeF2Correct
(D)Equivalent mass of BrO3⁻ is one-half of ionic massCorrect

Answer: (C),(D)

Solution

Bromine's oxidation number rises from +5 (in BrO3⁻) to +7 (in BrO4⁻), a genuine two-electron oxidation — so there IS a change in oxidation number, and the process is an oxidation, not a reduction. This conversion is indeed brought about by XeF2 acting as the oxidant, as shown

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Question ID VK-159480