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CUET · CHEMISTRY · PYQ PAPER 2025

Arrange the following complexes in increasing order of their magnetic moment
(A) \(\left[ Cr \left( H _2 O \right)_6\right]^{3+}\)
\((B)\left[ Co \left( NH _3\right)_6\right]^{3+}\)
\((C)\left[ FeCl _6\right]^{4-}\)
\((D)\left[ Mn ( CN )_6\right]^{3-}\)
Choose the correct answer from the options given below :

  1. A (C), (D), (A), (B)
  2. B (B), (D), (A), (C)
  3. C (B), (A), (C), (D)
  4. D (C), (A), (B), (D)
Verified Solution

Answer & Solution

Correct Answer

(B) (B), (D), (A), (C)

Step-by-step Solution

Detailed explanation

\((A) [Cr(H_2O)_6]^{3+}\): \(Cr^{3+}\) is \(3d^3\). \(n=3\). \(\mu_A = \sqrt{3(3+2)} = \sqrt{15}\). \((B) [Co(NH_3)_6]^{3+}\): \(Co^{3+}\) is \(3d^6\), strong field ligand. \(n=0\). \(\mu_B = \sqrt{0(0+2)} = 0\). \((C) [FeCl_6]^{4-}\): \(Fe^{2+}\) is \(3d^6\), weak field ligand.…
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