Which of the following is the correct statement about the colour of ?

Question

Canvas Classes · Accepted Answer

(permanganate ion):

- Mn is in +7 state →  (no d electrons)
- Cannot show  transition
- Purple/violet colour due to charge transfer (O → Mn) ✓

Comparison of Mn compounds:
| Compound | Mn O.S. | d config | Colour | Origin |
|----------|---------|----------|--------|--------|
|  | +7 |  | Purple | Charge transfer |
|  | +6 |  | Green |  + CT |
|  | +4 |  | Brown/black | — |
|  (aq) | +2 |  | Faint pink |  |

Answer: Option (2) — Purple due to charge transfer

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