JEE Main Chemistry question

In which reaction is there no change in valency and oxidation state?

(A)
(B)
(C)Na_2O_2 + H_2SO_4 \rightarrow Na_2SO_4 + H_2O_2Correct
(D)

Answer: (C)

Solution

Reaction (C) is simply a double-decomposition (acid-base) reaction: stays , stays , and oxygen stays in the peroxide () oxidation state in both and — no element changes oxidation state. In

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Question ID VK-146698