JEE Main202330 Jan 2023Evening ShiftChemistryd and f Block ElementsActual
KMnO 4 oxidises I - in acidic and neutral/faintly alkaline solution, respectively to
Options
- AI 2 and IO 3 -
- BIO 3 - and I 2
- CIO 3 - and IO 3 -
- DI 2 and I 2
Correct answer
A. I 2 and IO 3 -
Step-by-step solution
In the acidic medium, MnO 4 - convert to Mn 2 + and I - convert to I 2 . 2 MnO 4 - + 10 I - + 16 H + → 2 Mn 2 + + 5 I 2 + 8 H 2 O In neutral/faintly alkaline solution, MnO 4 - convert to MnO 2 and I - convert to IO 3 - . 2 MnO 4 - + I - + H 2 O → 2 MnO 2 + 2 OH - + IO 3 -