The hybridisation and unpaired electrons in $[Fe(H_2O)_6]^{2+}$ ion are:

The magnetic moment for two complexes of empirical formula $Ni(NH_3)_4(NO_3)_2 \cdot 2H_2O$ is $0$ and $2.84 \ BM$ respectively. The second complex is not a neutral complex. The correct formula and geometry of the first complex is:

Hybridizations of the central atom in $[Fe(H_2O)_6]^{3+}$ and $[Co(NH_3)_6]^{3+}$,respectively,are

In $[Pt(NH_3)_2Cl_2]$,the $Pt-Cl$ bond length is $2 \ \mathring{A}$ and the $Cl-Cl$ distance is $2.88 \ \mathring{A}$. What is the geometry of the compound?

$[Cr(H_2O)_6]Cl_3$ $(At. \text{ } no. \text{ } of \text{ } Cr = 24)$ has a magnetic moment of $3.83 \text{ } B.M.$ The correct distribution of $3d$ electrons in the chromium of the complex is

Which of the following pairs of structure and magnetic properties is correct for the tetracyanonickelate$(II)$ ion?