Match List-I (Complex ion) List-II (Spin only magnetic moment in B.M.) (A) [Cr(NH3)6]^3+ (I) 4.90

Question

Match List-I with List-II.

	List-I (Complex ion)		List-II (Spin only magnetic moment in B.M.)
(A)	\([Cr(NH_3)_6] ^{3+}\)	(I)	4.90
(B)	\([NiCl_4]^{2-}\)	(II)	3.87
(C)	\([CoF_6]^{3-}\)	(III)	0.0
(D)	\([Ni(CN)_4]^{2-}\)	(IV)	2.83

Choose the correct answer from the options given below : 

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

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

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

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

Answer 1

Correct option is (3) (A)-(II), (B)-(IV), (C)-(I), (D)-(III) 

(A) \([Cr (NH_3)_6] ^{3+}\)

\(Cr^{3+} : 3d^3\)

n = 3 (unpaired electrons)

\(\mu \simeq \) 3.87 B.M. (II)

(B) \([NiCl_4]^{2-}\)

\(Ni^{2+} : 3d ^8\)

n = 2

\(\mu \simeq \) 2.83 B.M. (IV)

(C) \([CoF_6]^{3-}\)

\(Co^{3+} : 3d ^6\)

n = 4

\(\mu \simeq\) 4.90 B.M. (I)

(D) \([Ni (CN)_4]^{2-}\)

\(Ni^{2+} : 3d ^8\)

n = 0

\(\mu = 0\) B.M. (III)