Question

Arrange the complex ions in the increasing order of their magnetic moments
\[ \text{A. } [Fe(H_2O)_6]^{2+} \quad \text{B. } [Fe(CN)_6]^{4-} \quad \text{C. } [Fe(CN)_6]^{3-} \quad \text{D. } [FeF_6]^{3-} \]

• A. \( D < A < B < C \)
• B. \( B < C < A < D \)
• C. \( D < C < B < A \)
• D. \( A < D < C < B \)

Hint:

Magnetic moment depends on number of unpaired electronsStrong field ligands cause pairing (low spin), weak field ligands give high spin.

Answer 1

The Correct Option is B