Medium MCQ +4 / -1 PYQ · JEE Mains 2023

In which of the following reactions the hydrogen peroxide acts as a reducing agent?

  1. A $\mathrm{M{n^{2 + }} + {H_2}{O_2} \to M{n^{4 + }} + 2O{H^ - }}$
  2. B $\mathrm{HOCl + {H_2}{O_2} \to {H_3}{O^ + } + C{l^ - } + {O_2}}$ Correct answer
  3. C $\mathrm{PbS + 4{H_2}{O_2} \to PbS{O_4} + 4{H_2}O}$
  4. D $\mathrm{2F{e^{2 + }} + {H_2}{O_2} \to 2F{e^{3 + }} + 2O{H^ - }}$

Solution

$\mathrm{HOCl}+\mathrm{H}_{2} \mathrm{O}_{2} \longrightarrow \mathrm{H}_{3} \mathrm{O}^{\oplus}+\mathrm{Cl}^{\ominus}+\mathrm{O}_{2}$ <br/><br/> In this reaction $\mathrm{H}_{2} \mathrm{O}_{2}$ is acting as a reducing agent as $\mathrm{Cl}$ is undergoing a change in oxidation state from $+1$ to $-1$.

About this question

Subject: Chemistry · Chapter: p-Block Elements · Topic: Group 13: Boron Family

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