Given below are two statements :

Statement I: ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ is square planar and diamagnetic complex, with ${\mathrm{dsp}}^2$ hybridization for $\mathrm{Ni}$ but $\left[\mathrm{Ni}{\left(\mathrm{CO}\right)}_4\right]$ is tetrahedral, paramagnetic and with ${\mathrm{sp}}^3$ hybridication for $\mathrm{Ni}$.

Statement II : ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$ and $\left[\mathrm{Ni}{\left(\mathrm{CO}\right)}_4\right]$ both have same d-electron configuration, have same geometry and are paramagnetic.

In light the above statements, choose the correct answer form the options given below

${\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]}^{4-}$

${\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]}^{3-}$

${\left[\mathrm{Ti}{\left(\mathrm{CN}\right)}_6\right]}^{3-}$

${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$

${\left[\mathrm{Co}{\left(\mathrm{CN}\right)}_6\right]}^{3-}$

Among the given complexes, number of paramagnetic complexes is

(a) ${\mathrm{CoCl}}_3.4{\mathrm{NH}}_3$,

(b) ${\mathrm{CoCl}}_3·5{\mathrm{NH}}_3$,

(c) ${\mathrm{CoCl}}_3·6{\mathrm{NH}}_3$ and

(d) $\mathrm{CoCl}{\left({\mathrm{NO}}_3\right)}_2·5{\mathrm{NH}}_3$

Number of complex(es) which will exist in cis-trans form is/are

For the reaction given below:

${\mathrm{CoCl}}_3. {\mathrm{xNH}}_3+{\mathrm{AgNO}}_3\left(\mathrm{aq}\right)\to$

If two equivalents of $\mathrm{AgCl}$ precipitate out, then the value of $\mathrm{x}$ will be _______

Consider the following metal complexes :

${\left[\mathrm{Co}\left({\mathrm{NH}}_3\right)\right]}^{3+}$

${\left[\mathrm{CoCl}{\left({\mathrm{NH}}_3\right)}_5\right]}^{2+}$

${\left[\mathrm{Co}(\mathrm{CN}{)}_6\right]}^{3-}$

${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left({\mathrm{H}}_2\mathrm{O}\right)\right]}^{3+}$

The spin-only magnetic moment value of the complex that absorbs light with shortest wavelength is B.M. (Nearest integer)

The correct order of energy of absorption for the following metal complexes is

$\mathrm{A}:{\left[\mathrm{Ni}{\left(\mathrm{en}\right)}_3\right]}^{2+},\mathrm{B}:{\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_6\right]}^{2+},\mathrm{C}:{\left[\mathrm{Ni}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$