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JEE Main levelSingle correct optionDifficulty 2 of 3df095

The colour of the permanganate ion, in which manganese has the configuration, arises from

  1. A- transitions
  2. Bligand-to-metal charge transfer
  3. Cmetal-to-ligand charge transfer
  4. Dspin-orbit coupling of electrons

Answer: B

Mn(VII) has no electrons, so - transitions are impossible. The intense purple colour is due to an electron being transferred from oxygen lone pairs into empty Mn orbitals, a ligand-to-metal charge transfer.
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