NEET2026ChemistryChapterActual
Given below are two statements regarding the oxidising behaviour of potassium permanganate: Statement I: In an acidic medium, KMnO₄ oxidises iodide to iodine, and the oxidation state of manganese changes from +7 to +2 . Statement II: In a neutral or faintly alkaline medium, KMnO₄ oxidises iodide to iodate, and the oxidation state of manganese changes from +7 to +6 . In the light of the above statements, choose the mo
Options
- ABoth Statement I and Statement II are correct
- BBoth Statement I and Statement II are incorrect
- CStatement I is correct but Statement II is incorrect
- DStatement I is incorrect but Statement II is correct
Correct answer
C. Statement I is correct but Statement II is incorrect
Step-by-step solution
In an acidic medium, potassium permanganate ( KMnO₄ ) acts as a strong oxidising agent. It oxidises iodide ( I^- ) to iodine ( I₂ ), while manganese is reduced from the +7 oxidation state to the +2 oxidation state ( Mn²⁺ ). The reaction is: 2MnO₄^- + 10I^- + 16H^+ 2Mn²⁺ + 5I₂ + 8H₂O Thus, Statement I is correct. In a neutral or faintly alkaline medium, KMnO₄ oxidises iodide ( I^- ) to iodate ( IO₃^- ). However, manganese is reduced from the +7 oxidation state to the +4 oxidation state (forming MnO₂ ), not +6 . The