. The color of KMnO4 is due to

A: M  →  L charge transfer transition

B: d - d transition

C: L  →  M charge transfer transition

D: σ  - σ^∗ transition

Best Answer


  • The colour of KMnO4 is due to the ligand to metal charge transfer. 
  • The magnesium(Mn) metal is in its highest  Oxidation State i.e +7 and it has no electron in its outermost shell The electronic configuration is metal hence there is no possibility of d-d  transition. 
  • There is transfer of charge takes place from the 2p orbital of oxygen ligand (O2-) to the vacant  orbital of Mn atom and we get intense purple colour of this compound.

Correct Option is: (C)

L  →  M charge transfer transition

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