MHT CET 2023 Chemistry question

Which from following cations in their respective oxidation states develops colourless aqueous solution?

(A)
(B)
(C)
(D)Correct

Answer: (D)

Solution

Colour of transition metal ions arises from d-d transitions, which require partially filled d orbitals (unpaired d-electrons). () is yellow/brown, () is pale

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Question ID VK-096553