Easy MCQ +4 / -1 PYQ · JEE Mains 2022

The reaction of $\mathrm{H}_{2} \mathrm{O}_{2}$ with potassium permanganate in acidic medium leads to the formation of mainly :

  1. A Mn<sup>2+</sup> Correct answer
  2. B Mn<sup>4+</sup>
  3. C Mn<sup>3+</sup>
  4. D Mn<sup>6+</sup>

Solution

The reaction of $\mathrm{KMnO}_{4}$ with $\mathrm{H}_{2} \mathrm{O}_{2}$ in acidic medium is as <br/><br/> $$ \begin{aligned} 2 \mathrm{KMnO}_{4}+3 \mathrm{H}_{2} \mathrm{SO}_{4}+5 \mathrm{H}_{2} \mathrm{O}_{2} \\ & \rightarrow \mathrm{K}_{2} \mathrm{SO}_{4}+2 \mathrm{MnSO}_{4}+8 \mathrm{H}_{2} \mathrm{O}+5 \mathrm{O}_{2} \end{aligned} $$<br/><br/> $\therefore \mathrm{Mn}^{2+}$ will be formed as the product.

About this question

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

This question is part of PrepWiser's free JEE Main question bank. 300 more solved questions on p-Block Elements are available — start with the harder ones if your accuracy is >70%.

Drill 25 more like these. Every day. Free.

PrepWiser turns these solved questions into a daily practice loop. Chapter-wise drills, full mocks, AI doubt chat. No auto-renew.

Start free →