JEE Advanced Chemistry question

In the conversion of Br⁻ to BrO2⁻

(A)There is anodic oxidation in basic solutionCorrect
(B)Equivalent mass of Br⁻ is 20 (atomic weight of Br = 80)Correct
(C)There is anodic oxidation in acidic medium
(D)There is cathodic reduction in basic solution

Answer: (A),(B)

Solution

Bromine's oxidation state rises from −1 (Br⁻) to +3 (in BrO2⁻), a 4-electron oxidation, occurring via anodic oxidation (oxidation always occurs at the anode) under the basic conditions typically used to generate and stabilise this oxohalogen anion — confirming (a) and ruling out both (c)'s

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Question ID VK-159487