The pair of metal ions that can give a spinonly magnetic moment of

Question:

The pair of metal ions that can give a spinonly magnetic moment of $3.9 \mathrm{BM}$ for the complex $\left[\mathrm{M}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{2}$, is :

  1. $\mathrm{Cr}^{2+}$ and $\mathrm{Mn}^{2+}$

  2. $\mathrm{V}^{2+}$ and $\mathrm{Co}^{2+}$

  3. $\mathrm{V}^{2+}$ and $\mathrm{Fe}^{2+}$

  4. $\mathrm{Co}^{2+}$ and $\mathrm{Fe}^{2+}$

Correct Option: , 2

Solution:

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