JEE Advanced Chemistry question

There are three electrons unpaired in and calculated value of magnetic moment is 3.87 BM which is quite different from the experimental value of 4.40 BM. This is because of

(A)Increase in number of unpaired electrons
(B)Some contribution of the orbital motion of the electron to the magnetic momentCorrect
(C)Change in orbital spin of the electron
(D)d-d* transition

Answer: (B)

Solution

The spin-only formula assumes magnetic moment arises purely from electron spin, ignoring any orbital angular momentum contribution. For some metal ions, especially those with -term ground states like high-spin () in an octahedral field, the orbital

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Question ID VK-159665