Medium MCQ +4 / -1 PYQ · JEE Mains 2022

The products obtained from a reaction of hydrogen peroxide and acidified potassium permanganate are :

  1. A $\mathrm{Mn}^{4+}, \mathrm{H}_{2} \mathrm{O}$ only
  2. B $\mathrm{Mn}^{2+}, \mathrm{H}_{2} \mathrm{O}$ only
  3. C $\mathrm{Mn}^{4+}, \mathrm{H}_{2} \mathrm{O}, \mathrm{O}_{2}$ only
  4. D $\mathrm{Mn}^{2+}, \mathrm{H}_{2} \mathrm{O}, \mathrm{O}_{2}$ only Correct answer

Solution

$$2 \mathrm{MnO}_{4}^{-}+6 \mathrm{H}^{+}+5 \mathrm{H}_{2} \mathrm{O}_{2} \longrightarrow 2 \mathrm{Mn}^{2+}+8 \mathrm{H}_{2} \mathrm{O}+5 \mathrm{O}_{2}$$ <br/><br/> This reaction shows reducing action of $\mathrm{H}_{2} \mathrm{O}_{2}$ in acidic medium. <br/><br/> The products formed are $\mathrm{Mn}^{2+}, \mathrm{H}_{2} \mathrm{O}$ and $\mathrm{O}_{2}$

About this question

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

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