Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The colour of KMnO 4 is due to: [where M 
metal, L 
ligand]
A
transition
B
M 
L charge transfer transition
L charge transfer transition
C
d — d transition
D
L 
M charge transfer transition
M charge transfer transition
Text Solution
Verified by ExpertsThe correct answer is:
D
Charge transfer from O 2- to empty d -orbitals of metal ion (Mn 7+ ).
The colour in KMnO 4 arises from an electronic transition. In the permanganate ion 
, manganese is in the +7 oxidation state, so it has no d electrons. Photons promote an electron from the highest energy molecular orbital to an empty d -orbital on the manganese. When a photon of light is absorbed, this charge transfer takes place from L to M.
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