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  4. The spin only magnetic moment of [ Mn ( H 2 O )6]2+ complexes is B.M. (Nearest integer) (Given: Atomic no. of Mn is 25 )

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Q. The spin only magnetic moment of $\left[ Mn \left( H _2 O \right)_6\right]^{2+}$ complexes is ____ B.M. (Nearest integer)
(Given: Atomic no. of $Mn$ is 25 )

JEE MainJEE Main 2023

Solution:

$ \left[ Mn \left( H _2 O \right)_6\right]^{2+}$
$ Mn ^{2+}=3 d ^5 $
$ \mu=\sqrt{5(5+2)}=5.91\, BM $