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NEET levelSingle correct optionDifficulty 1 of 3df115

The intense purple colour of aqueous $KMnO X_{4}$ is due to:

Af-f transition
Bpresence of unpaired electrons in Mn
Cd-d transition of Mn(VII)
Dligand-to-metal charge transfer

Answer: D

Mn in

MnO X_{4} X^{-}

is in the +7 state,

3 d^{0}

, so no d-d transition is possible. The colour comes from electron transfer from oxygen to Mn, i.e. ligand-to-metal charge transfer.

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