Question

The reaction of aqueous KMnO₄ with H₂O₂ in acidic conditions gives ______.

Options

• Mn⁴⁺ and O₂

• Mn²⁺ and O₂

• Mn²⁺ and O₃

• Mn⁴⁺ and MnO₂

Answer 1

The reaction of aqueous KMnO₄ with H₂O₂ in acidic conditions gives Mn²⁺ and O₂.

Explanation:

In an acidic medium, potassium permanganate (KMnO₄) acts as a strong oxidising agent. When it reacts with hydrogen peroxide (H₂O₂), the H₂O₂ is oxidised to oxygen gas (O₂), and the purple MnO⁴⁻ ion is reduced to Mn²⁺.

\[\ce{2MnO^-_4 + 5H2O2 + 6H+ -> 2Mn^{2+} + 5O2 + 8H2O}\]