NEET 2010 Chemistry question

Which one of the following complex ions is not expected to absorb visible light?

(1)Correct
(2)
(3)
(4)

Answer: (1)

Solution

A complex absorbs visible light through - transitions, which require unpaired electrons (partially filled subshell). : is ; the strong-field ligand pairs all the electrons (square planar, ), so there are no unpaired electrons and no

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Question ID VK-090510