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Which one of the following ions has same number of unpaired electrons as that of $V^{3 +}$ ion?

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${Fe}^{3 +}$

${Ni}^{2 +}$

${Cr}^{3 +}$

${Mn}^{2 +}$

answer is C.

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Detailed Solution

V³⁺ has 3d² outer electronic configuration with 2 unpaired electrons.

Ni²⁺ has 3d⁸ outer electronic configuration with 2 unpaired electrons.

Hence, V³⁺ and Ni²⁺ have same number of unpaired electrons.

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