Question

write the hybridization and magnetic character of the following
complexes :
(i) [Fe(H20)6]2+
(ii) [Ni(CN),12-
[Atomic number : Fe = 26, Ni = 28]
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Answer 1

Explanation:

the star indicates the orbitals used in hybridization..hope it helped

Answer 2

(i). The hybridization of $[$ Fe(H$_{2}$O)$_{6}$ $]^{2+}$ is s$p^3d^2$ .  H$_{2}$O can not cause the pairing of electrons .

Due to the unpaired electrons , it is highly paramagnetic in nature .

(ii). The hybridization of $[$ Ni(CN)$_{4}$ $]^{2-}$ is ds$p^{2}$ . C$N^{-}$ can cause the pairing of electrons .

All the electrons are paired in the complex . So, the complex is diamagnetic in nature .