MHT CET 2022 Chemistry question

What is the number of unpaired electrons of nickel observed in ?

(A)6
(B)2
(C)4
(D)zeroCorrect

Answer: (D)

Solution

Oxidation state of Ni: , so Ni is . CN is a strong-field ligand, so the two unpaired 3d electrons are forced to pair up, leaving one 3d orbital empty. This vacant 3d orbital, the 4s and two 4p orbitals undergo

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Question ID VK-093659