For the complex ${\mathrm{K}}_2\left[\mathrm{Cr}\left(\mathrm{NO}\right)\left({\mathrm{NH}}_3\right)(\mathrm{CN}{)}_4\right]; \mathrm{\mu }=1.73 \mathrm{BM}$

$\left(\mathrm{i}\right)$ Write the IUPAC name.

$\left(\mathrm{ii}\right)$ What will be structure?
$\left(\mathrm{iii}\right)$ How many unpaired electrons are present in the central metal ion?

$\left(\mathrm{iv}\right)$ Is it paramagnetic or diamagnetic?

$\left(\mathrm{v}\right)$ Calculate the $\mathrm{EAN}$EAN of the complex.

$\left(\mathrm{vi}\right)$ What will be the hybridisation of the complex?

Predict the hybridisation and geometry of the following complexes.

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

$\left(\mathrm{b}\right)$ ${\left[{\mathrm{MnBr}}_4\right]}^{2-}$

$\left(\mathrm{c}\right)$ ${\left[\mathrm{Fe}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$

$\left(\mathrm{d}\right)$ ${\left[\mathrm{Co}(\mathrm{SCN}{)}_4\right]}^{2-}$

Arrange the following in increasing order as directed.

$\left(\mathrm{a}\right)$ $\left(\mathrm{i}\right) \left[{\mathrm{CoCl}}_3{\left({\mathrm{NH}}_3\right)}_3\right],$ $\left(\mathrm{ii}\right) \left[\mathrm{CoCl}{\left({\mathrm{NH}}_3\right)}_5\right]{\mathrm{Cl}}_2,$ $\left(\mathrm{iii}\right) \left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]{\mathrm{Cl}}_3,$ $\left(\mathrm{iv}\right) \left[{\mathrm{CoCl}}_2{\left({\mathrm{NH}}_3\right)}_4\right]\mathrm{Cl}$- Molar conductance

$\left(\text{b}\right)$ $\mathrm{Br},{\mathrm{S}}^{2-},{\mathrm{NO}}_2^{-},\mathrm{CO},{\mathrm{H}}_2\mathrm{O},{\mathrm{CN}}^{-},{\mathrm{NH}}_3,{\mathrm{NO}}_3^{-}$- Strength of the ligands.

For each of the following complexes, draw a crystal field energy-level diagram, assign the electrons to orbitals, and predict the number of unpaired electrons:

$\left(\mathrm{a}\right)$ ${\left[{\mathrm{CrF}}_6\right]}^{3-}$

$\left(\mathrm{b}\right)$ ${\left[\mathrm{V}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$

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

$\left(\mathrm{d}\right)$ ${\left[\mathrm{Cu}(\mathrm{en}{)}_3\right]}^{2+}$

$\left(\mathrm{e}\right)$ ${\left[{\mathrm{FeF}}_6\right]}^{3-}$

The value of ${\mathrm{\Delta }}_0$ for ${\left[\mathrm{Ti}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$  is found to be $240 \mathrm{kJ} {\mathrm{mol}}^{-1}$, then predict the colour of the complex using the following table. $\left(\mathrm{h}=6\times {10}^{-34}\mathrm{J}-\mathrm{Sec}, {\mathrm{N}}_{\mathrm{A}}=6\times {10}^{23},\mathrm{c}=3\times {10}^8 \mathrm{m} {\sec }^{-1}\right)$

$\left(\mathrm{a}\right)$ ${\left[\mathrm{Ti}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$ absorbs light of wavelength $5000 \mathrm{\AA }.$ Name one ligand which would form a titanium $\left(\mathrm{III}\right)$ complex absorbing light of lower wavelength than $5000 \mathrm{\AA }$ and one ligand which would form a complex absorbing light of wavelength higher than $5000 \mathrm{\AA }.$

$\left(\mathrm{b}\right)$ Calculate the magnetic moments (spin only) of the following complexes

$\left(\mathrm{i}\right) {\left[{\mathrm{PtCl}}_6\right]}^{2-}$

$\left(\mathrm{ii}\right) \left[\mathrm{Cr}(\mathrm{CO}{)}_6\right]$

$\left(\mathrm{iii}\right) {\left[lr{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$

$\left(\mathrm{iv}\right) {\left[\mathrm{Pd}(\mathrm{en}{)}_2\right]}^{2+}$

What type of isomers are the following?

$\left(\mathrm{i}\right) {\left[\mathrm{Mn}(\mathrm{CO}{)}_5\mathrm{SCN}\right]}^{+}$ and ${\left[\mathrm{Mn}(\mathrm{CO}{)}_5\mathrm{NCS}\right]}^{+}$

$\left(\mathrm{ii}\right) \left[\mathrm{Co}(\mathrm{en}{)}_3\right]\left[\mathrm{Cr}(\mathrm{CN}{)}_6\right]$ and $\left[\mathrm{Cr}(\mathrm{en}{)}_3\right]\left[\mathrm{Co}(\mathrm{CN}{)}_6\right]$

$\left(\mathrm{iii}\right) \left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5{\mathrm{NO}}_3\right]{\mathrm{SO}}_4$ and $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5{\mathrm{SO}}_4\right]{\mathrm{NO}}_3$

$\left(\mathrm{iv}\right) \left[\mathrm{Co}{\left({\mathrm{H}}_2\mathrm{O}\right)}_2{\mathrm{Cl}}_2(\mathrm{py}{)}_2\right]\mathrm{C}$ and $\left[\mathrm{Co}\left({\mathrm{H}}_2\mathrm{O}\right){\mathrm{Cl}}_3(\mathrm{py}{)}_2\right]{\mathrm{H}}_2\mathrm{O}$