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The colour of KMnO4 is due to:

1. L → M charge transfer transition
2. σ → σ* transition
3. M → L charge transfer transition
4. d - d transition

Correct answer: L → M charge transfer transition

Solution

The color of KMnO4 arises from the L → M charge transfer transition, where electrons are excited from ligand orbitals (L) to metal orbitals (M), resulting in the absorption of specific wavelengths of light that give the compound its characteristic color.

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