Match List-I with List-II : List-I List-II --- --- A. [ Ni ( CO ) 4 ] I. Tetrahedral, 2.8 BM B. [ Ni ( CN ) 4 ] 2- II. Square planar, 0 BM C. [ NiCl 4 ] 2- III. Tetrahedral, 0 BM D. [ MnBr 4 ] 2- IV. Tetrahedral, 5.9 BM Choose the correct answer from the options given below

A ( III ), B ( IV ), C ( II ), D ( I )

Chemistry · Coordination Compounds

JEE Main 2025 — 8 April, Evening Shift — Question 2

Match List-I with List-II :

List-I	List-II
A. $\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$	I. Tetrahedral, 2.8 BM
B. $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$	II. Square planar, 0 BM
C. $\left[\mathrm{NiCl}_{4}\right]^{2-}$	III. Tetrahedral, 0 BM
D. $\left[\mathrm{MnBr}_{4}\right]^{2-}$	IV. Tetrahedral, 5.9 BM

Choose the correct answer from the options given below

Option A:
$A($ III) $, B(I I), C(I), D(I V)$
Correct
Option B:
$A(I), B(I I), C(I I I), D(I V)$
Option C:
$A(I V), B(I), C(I I I), D(I I)$
Option D:
$\mathrm{A}(\mathrm{III}), \mathrm{B}(\mathrm{IV}), \mathrm{C}(\mathrm{II}), \mathrm{D}(\mathrm{I})$

A) $\mathrm{Ni}(\mathrm{CO})_{4} \rightarrow \mathrm{Ni}(0) \Rightarrow \mathrm{sp}^{3}$ , tetrahedral, 0 BM

(3d ${ }^{10}$ )(pairing)

B) $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{--} \rightarrow \mathrm{Ni}^{2+} \Rightarrow \mathrm{dsp}^{2}$ , square planar, 0 BM

(3d ${ }^{8}$ )(pairing)

C) $\left[\mathrm{NiCl}_{4}\right]^{2-} \rightarrow \mathrm{Ni}^{2+}$ (no pairing) $\Rightarrow \mathrm{sp}^{3}$ , tetrahedral, 2.8 BM

D) $\left[\mathrm{MnBr}_{4}\right]^{2^{-}} \Rightarrow \mathrm{Mn}^{2+} \Rightarrow 3 \mathrm{~d}^{5}$ (no pairing)

\mu=5.9 \mathrm{BM}

(A-III, B-II, C-I, D-IV)

Answer key and solution verified before publishing.

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