Which of the following statements is incorrec | vedclass

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(D) Let us analyze each complex:$1$. In $[VF_6]^{3-}$,$V$ is in $+3$ oxidation state. $V^{3+}$ is $3d^2$. It has $2$ unpaired electrons,so it is param

Vedclass · Accepted Answer

$[CoF_6]^{3-}$ is paramagnetic with $2$ unpaired electrons.

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(D) Let us analyze each complex:$1$. In $[VF_6]^{3-}$,$V$ is in $+3$ oxidation state. $V^{3+}$ is $3d^2$. It has $2$ unpaired electrons,so it is paramagnetic. This statement is correct.$2$. In $[CuCl_4]^{2-}$,$Cu$ is in $+2$ oxidation state. $Cu^{2+}$ is $3d^9$. It has $1$ unpaired electron,so it is paramagnetic. This statement is correct.$3$. In $[Co(NH_3)_6]^{3+}$,$Co$ is in $+3$ oxidation state. $Co^{3+}$ is $3d^6$. $NH_3$ is a strong field ligand,causing pairing of electrons. All $6$ electrons are paired,so it is diamagnetic. This statement is correct.$4$. In $[CoF_6]^{3-}$,$Co$ is in $+3$ oxidation state. $Co^{3+}$ is $3d^6$. $F^-$ is a weak field ligand,so no pairing occurs. The $3d$ orbitals have $4$ unpaired electrons. Thus,it is paramagnetic with $4$ unpaired electrons. The statement claiming $2$ unpaired electrons is incorrect.

Which of the following statements is incorrect?

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