Match List-I with List-II. List 1 List 2 --- --- (A) [ Cr ( N H 3 ) 6 ] 3+ (I) 4.90 (B) [ NiC l 4 ] 2- (II) 3.87 (C) [ Co F 6 ] 3- (III) 0.0 (D) [ Ni ( CN ) 4 ] 2- (IV) 2.83 Choose the correct answer from the options given below :

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

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

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

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

Chemistry · Coordination Compounds

JEE Main 2024 — 8 April, Shift 2 — Question 77

Match List-I with List-II.

List 1	List 2
(A) ${{\left[ \text{Cr}{{\left( \text{N}{{\text{H}}_{3}} \right)}_{6}} \right]}^{3+}}$	(I) 4.90
(B) ${{\left[ \text{NiC}{{\text{l}}_{4}} \right]}^{2-}}$	(II) 3.87
(C) ${{\left[ \text{Co}{{\text{F}}_{6}} \right]}^{3-}}$	(III) 0.0
(D) ${{\left[ \text{Ni}{{(\text{CN})}_{4}} \right]}^{2-}}$	(IV) 2.83

Choose the correct answer from the options given below :

(A) $\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$

$\mathrm{Cr}^{3+}: 3 \mathrm{~d}^{3}$

$\mathrm{n}=3$ (unpaired electrons) $\mu \simeq 3.87$ B.M. (II)

(B) $\left[\mathrm{NiCl}_{4}\right]^{2-}$

$\mathrm{Ni}^{2+}: 3 \mathrm{~d}^{8}$

$\mathrm{n}=2$

$\mu \simeq 2.83$ B.M. (IV)

$\mathrm{Co}^{3+}: 3 \mathrm{~d}^{6}$

$\mathrm{n}=4$ $\mu \simeq 4.90$ B.M. (I)

(D) $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$

$\mathrm{Ni}^{2+}: 3 \mathrm{~d}^{8}$

$\mathrm{n}=0$ $\mu=0$ B.M. (III)

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