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MHT CET Chemistry question

ChemistryCoordination CompoundsMHT CET

Which of the following complexes is an outer orbitals complex? (Atomic numbers : Mn = 25; Fe = 26; Co = 27; Ni = 28) [AIEEE 2004]

Answer: (D)

Solution

() has no vacant 3d orbital pair to give , so uses outer 4s, 4p and 4d orbitals (),

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Question ID VK-073228