In which of the following reactions, H_2O_2 behaves as a reducing agent?

JEE Main Chemistry question

In which of the following reactions, HO behaves as a reducing agent?

(A)NaSO(aq) + HO(aq) → NaSO(aq) + HO(l)
(B)PbO(s) + HO(aq) → PbO(s) + HO(l) + O(g)Correct
(C)2KI(aq) + HO(aq) → 2KOH(aq) + I(s)
(D)KNO(aq) + HO(aq) → KNO(aq) + HO(l)

Answer: (B)

Solution

In (A), (C) and (D), HO oxidises sulphite to sulphate, iodide to iodine, and nitrite to nitrate respectively, being itself reduced (oxidising agent behaviour). In (B), lead goes from +4 (in

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Question ID VK-137274