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CUET · CHEMISTRY · PYQ PAPER 2025

Magnetic moment values for \(\left[ Fe \left( H _2 O \right)_6\right]^{3+}\) and \(\left[ Fe ( CN )_6\right]^{3-}\) are ....

  1. A 1.74 BM and 5.92 respectively
  2. B 5.92 BM and 1.74 respectively
  3. C 1.74 BM for both
  4. D 5.92 BM for both
Verified Solution

Answer & Solution

Correct Answer

(B) 5.92 BM and 1.74 respectively

Step-by-step Solution

Detailed explanation

For \(\left[ Fe \left( H _2 O \right)_6\right]^{3+}\): \(\text{Fe}^{3+}: 3d^5\) \(\text{H}_2\text{O}\) (weak field ligand) \(\Rightarrow n=5\) \(\mu = \sqrt{5(5+2)} = \sqrt{35} \approx 5.92\) BM For \(\left[ Fe ( CN )_6\right]^{3-}\): \(\text{Fe}^{3+}: 3d^5\) \(\text{CN}^-\)…