Match List-I with List-II. List-I (Complex ion) List-II (Spin only magnetic moment in B.M.) (A) [Cr(NH3)6]3+ (I) 4.90 (B) [NiCl4]2– (II) 3.87 (C) [CoF6]3– (III) 0.0 (D) [Ni(CN)4]2– (IV) 2.83 Choose th

Question

Match List-I with List-II. List-I (Complex ion) List-II (Spin only magnetic moment in B.M.) (A) [Cr(NH3)6]3+ (I) 4.90 (B) [NiCl4]2– (II) 3.87 (C) [CoF6]3– (III) 0.0 (D) [Ni(CN)4]2– (IV) 2.83 Choose the correct answer from the options given below :

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

Prashant Kotian · Accepted Answer

Correct answer: C. (A) [Cr(NH3)6]3+ Cr3+ : 3d3 n = 3 (unpaired electrons)  3.87 B.M. (II) (B) [NiCl4]2– Ni2+ : 3d8 n = 2  2.83 B.M. (IV) (C) [CoF6]3– Co3+ : 3d6 n = 4  4.90 B.M. (I) (D) [Ni(CN)4]2– Ni2+ : 3d8 n = 0  = 0 B.M. (III) $//(1® SECTION-B

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