NEET2026ChemistryChapterActual
When KMnO ₄ acts as a strong oxidizing agent in an acidic medium, the oxidation state of manganese changes from +7 to:
Options
- A+2
- B+3
- C+4
- D+6
Correct answer
A. +2
Step-by-step solution
In an acidic medium, potassium permanganate ( KMnO ₄ ) acts as a strong oxidizing agent and gets reduced to manganese(II) ion ( Mn ²⁺ ). The half-reaction is: MnO ₄^- + 8 H ^+ + 5 e ^- Mn ²⁺ + 4 H ₂ O The oxidation state of manganese in KMnO ₄ is +7 . In the product Mn ²⁺ , the oxidation state is +2 . Thus, the oxidation state of manganese changes from +7 to +2 . Answer: +2