Question

In neutral medium KMnO$_4$ oxidises MnSO$_4$ to __________

• A. Mn$_2$O$_3$
• B. Mn$_3$O$_4$
• C. MnO$_2$
• D. K$_2$MnO$_4$

Hint:

In neutral medium, KMnO$_4$ usually reduces to MnO$_2$, and it is a common reaction in redox processes involving Mn compounds.

Answer 1

The Correct Option is C

In neutral medium, potassium permanganate (KMnO$_4$) oxidises manganese(II) salts such as manganese sulfate (MnSO$_4$) to MnO$_2$. The reaction in neutral medium is: \[ 2 \text{MnSO}_4 + \text{KMnO}_4 \rightarrow 3 \text{MnO}_2 + \text{K}_2\text{SO}_4 \] Here, KMnO$_4$ acts as an oxidizing agent, and in neutral or slightly alkaline conditions, it reduces to MnO$_2$. The manganese in MnSO$_4$ is in the +2 oxidation state, and it is oxidized to the +4 oxidation state in MnO$_2$.
Thus, the correct answer is MnO$_2$.