Question

The charge required for the reduction of 1 mol of \( MnO_4^- \) to \( MnO_2 \) is

• A. 1 F
• B. 3 F
• C. 5 F
• D. 6 F

Hint:

The number of Faradays required for a redox reaction corresponds to the total number of electrons involved in the oxidation or reduction of the species.

Answer 1

The Correct Option is C

In the reduction of \( MnO_4^- \) to \( MnO_2 \), the manganese ion undergoes a change in oxidation state from +7 to +4, which requires 5 moles of electrons. Hence, the charge required is 5 F (Faradays).
Step 2: Thus, the correct answer is option (3).