JEE MAIN - Chemistry Hindi (2025 - 4th April Evening Shift - No. 16)

$\left[\mathrm{FeF}_6\right]^{3-},\left[\mathrm{CoF}_6\right]^{3-},\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ एवं $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ संकुलों में अयुग्मित इलेक्ट्रॉनों की संख्या के आधार पर सही क्रम है :
$\left[\mathrm{FeF}_6\right]^{3-}>\left[\mathrm{CoF}_6\right]^{3-}>\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}>\left[\mathrm{Ni}(\mathrm{CO})_4\right]$
$\left[\mathrm{FeF}_6\right]^{3-}>\left[\mathrm{CoF}_6\right]^{3-}>\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}=\left[\mathrm{Ni}(\mathrm{CO})_4\right]$
$\left[\mathrm{CoF}_6\right]^{3-}>\left[\mathrm{FeF}_6\right]^{3-}>\left[\mathrm{Ni}(\mathrm{CO})_4\right]>\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$
$\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}>\left[\mathrm{FeF}_6\right]^{3-}>\left[\mathrm{CoF}_6\right]^{3-}>\left[\mathrm{Ni}(\mathrm{CO})_4\right]$

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