Match List - I with List - II. $ \begin{array}{ll} \text{List - I} & \text{List - II} \\ \text{(A)} &…

1. (A) \(-(\mathrm{IV}),(\mathrm{B})-(\mathrm{II}),(\mathrm{C})-(\mathrm{I}),(\mathrm{D})-(\mathrm{III})\)
2. \((\mathrm{A})-(\mathrm{III}),(\mathrm{B})-(\mathrm{I}),(\mathrm{C})-(\mathrm{II}),(\mathrm{D})-(\mathrm{IV})\)
3. (A) \(-(\mathrm{IV}),(\mathrm{B})-(\mathrm{I}),(\mathrm{C})-(\mathrm{II}),(\mathrm{D})-(\mathrm{III})\)
4. \((\mathrm{A})-(\mathrm{III}),(\mathrm{B})-(\mathrm{II}),(\mathrm{C})-(\mathrm{I}),(\mathrm{D})-(\mathrm{IV})\)

Solution

$\begin{aligned}
& \text { (A) }\left[\mathbf{M n B r}_4\right]^{2-} \\
& \mathrm{Mn}^{+2} \Rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^5
\end{aligned}$
In presence of ligand field

$\Rightarrow \mathrm{sp}^3$ hybridization, paramagnetic in nature
(B) $\left[\mathrm{FeF}_6\right]^{3-}$
$\mathrm{Fe}^{+3} \Rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^5$
In presence of ligand field
$\Rightarrow \mathrm{sp}^3 \mathrm{~d}^2$ hybridization, paramagnetic in nature
(C) $\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$
$\mathrm{Co}^{+3} \Rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^6$
In presence of ligand field
$\Rightarrow d^2 \mathrm{sp}^3$ hybridization, diamagnetic in nature
(D) $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$
$\mathrm{Ni}^0 \Rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^8 4 \mathrm{~s}^2$
In presence of ligand field
$\Rightarrow \mathrm{sp}^3$ hybridization, diamagnetic in nature

Asked in: JEE Main 2025 (29 Jan Shift 1)

Practice more Coordination Compounds questions on Aicharya