Match the List-I with List-II List-I Complex ion List-II Calculated spin only magnetic moment (BM) A. [ Cr ( H 2 O ) 6 ] 2 + I. 3.87 B. [ Co ( H 2 O ) 6 ] 2 + II. 5.92 C. [ Cu ( H 2 O ) 6

Question

Match the List-I with List-II

List-I Complex ion	List-II Calculated spin only magnetic moment (BM)
A. $[Cr (H_{2} O)_{6}]^{2 +}$	I. 3.87
B. $[Co (H_{2} O)_{6}]^{2 +}$	II. 5.92
C. $[Cu (H_{2} O)_{6}]^{2 +}$	III. 4.90
D. $[Mn (H_{2} O)_{6}]^{2 +}$	IV. 1.73

Choose the correct answer from the options given below :

TestHub · Accepted Answer

Spin-only moment μ=√n(n+2) BM.
[Cr(H₂O)₆]²⁺ (d⁴) has 4 unpaired e⁻, 4.90 BM (III);
[Co(H₂O)₆]²⁺ (d⁷) has 3 unpaired e⁻, 3.87 BM (I);
[Cu(H₂O)₆]²⁺ (d⁹) has 1 unpaired e⁻, 1.73 BM (IV);
[Mn(H₂O)₆]²⁺ (d⁵) has 5 unpaired e⁻, 5.92 BM (II).
Hence option (D).

Chemistry - Coordination Chemistry Question with Solution | TestHub

Options:

Doubts & Discussion