The correct order of the spin-only magnetic moments of the following complexes is :

Question:

The correct order of the spin-only magnetic moments of the following complexes is :

(I) $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Br}_{2}$

(II) $\mathrm{Na}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$

(III) $\mathrm{Na}_{3}\left[\mathrm{Fe}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]\left(\Delta_{0}>\mathrm{P}\right)$

(IV) $\left(\mathrm{Et}_{4} \mathrm{~N}\right)_{2}\left[\mathrm{CoCl}_{4}\right]$

  1. (III) $>$ (I) $>$ (II) $>$ (IV)

  2. (I) $>(\mathrm{IV})>$ (III) $>$ (II)

  3. (II) $\approx(\mathrm{I})>$ (IV) $>$ (III)

  4. (III) $>(\mathrm{I})>(\mathrm{IV})>(\mathrm{II})$


Correct Option: , 2

Solution:

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