Which one of the following is an inner orbita | vedclass

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(C) The correct option is $C$. $1$. For $[Co(NH_3)_6]^{3+}$,the oxidation state of $Co$ is $+3$. The electronic configuration of $Co^{3+}$ is $[Ar] 3d

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$[Co(NH_3)_6]^{3+}$

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(C) The correct option is $C$. $1$. For $[Co(NH_3)_6]^{3+}$,the oxidation state of $Co$ is $+3$. The electronic configuration of $Co^{3+}$ is $[Ar] 3d^6$. $2$. $NH_3$ is a strong field ligand,which causes pairing of electrons in the $3d$ orbitals. $3$. The configuration becomes $t_{2g}^6 e_g^0$,utilizing $d^2sp^3$ hybridization,which makes it an inner orbital complex. $4$. Since all electrons are paired,the complex is diamagnetic.

Which one of the following is an inner orbital complex as well as diamagnetic in behaviour? (Atomic number: $Zn = 30$,$Cr = 24$,$Co = 27$,$Ni = 28$)

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