Question:
For octahedral $\mathrm{Mn}$ (II) and tetrahedral $\mathrm{Ni}$ (II) complexes, consider the following statements :
(I) both the complexes can be high spin.
(II) $\mathrm{Ni}$ (II) complex can very rarely below spin.
(III) with strong field ligands, Mn(II) complexes can be low spin.
(IV) aqueous solution of $\mathrm{Mn}$ (II) ions is yellow in color.
The correct statements are :
Correct Option: , 3
Solution:
With weak field ligands $\mathrm{Mn}$ (II) will be of high spin and with strong field ligands it will be of low spin. $\mathrm{Ni}$ (II) tetrahedral complexes will be generally of high spin due to $s p^{3}$ hybridisation. Mn(II) is of light pink colour in aqueous solution.