JEE Main levelSingle correct optionDifficulty 2 of 3df124
Assertion (A): Permanganate ion is intensely coloured although manganese in it has no d electron.
Reason (R): The colour arises from ligand-to-metal charge transfer, which does not need d electrons on the metal.
ABoth A and R are true and R is the correct explanation of A
BBoth A and R are true but R is not the correct explanation of A
CA is true but R is false
DA is false but R is true
Answer: A
In MnOX4X−, Mn is +7 (3d0), so d-d transitions are impossible. The colour comes from an O→Mn charge-transfer transition into the empty d orbitals, so R explains A.