Question

Potassium permanganate acts as an oxidant in neutral, alkaline as well as acidic media. The final products obtained from it in the three conditions are, respectively.

Options

• MnO₂, MnO₂ , Mn²⁺ 

• `"MnO"_4^(2-)`, Mn³⁺, Mn²⁺ 

• MnO₂, `"MnO"_4^(2-)`

• MnO, MnO₄, Mn²⁺

Answer 1

MnO₂, MnO₂ , Mn²⁺ 

Explanation:

MnO₂, MnO₂ , Mn²⁺ 

In neutral medium:

\[\ce{2KMnO4 + 3 MnSO4 + 2H2O -> K2SO4 + 2H2SO4 + 5MnO2}\]

In alkaline medium:

\[\ce{2KMnO4 + H2O -> 2MnO2 + 2KOH + 3[O]}\]

In acidic medium:

\[\ce{2KMnO4 + 3H2SO4 -> K2SO4 + 2\overset{+2}{Mn}SO4 + 5H2O + 5O}\]