MHT CET 2023 Chemistry question

What is the value of in order to balance following redox reaction? Mn^{2+}_{(aq)} + xClO^{-}_{3(aq)} \longrightarrow MnO_{2(s)} + xClO_{2(aq)}

(A) = 1
(B) =2Correct
(C) =3
(D) =4

Answer: (B)

Solution

Use the change in oxidation number. Mn goes from +2 in to +4 in , losing 2 electrons per Mn (oxidation). In chlorine is +5, and in it is +4, gaining 1 electron per Cl (reduction). For

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Question ID VK-095344