Valence Bond Theory in Coordination Compounds

Ammonia forms the complex ion  ${[\text{Cu}{({\text{NH}}_{\text{3}})}_{\text{4}}]}^{\text{2}+}$  with copper ions in alkaline solution but not in acidic solution. The probable reason for this is:

How many EDTA (ethylene diaminetetracetic acid) molecules are required to make an octahedral complex  ${\text{Ca}}^{\text{2}+}$  ion?

Nickel $(\mathrm{Z} = 28)$ combines with a uninegative monodentate ligand ${\mathrm{X}}^{-}$ to form a paramagnetic complex $[{\mathrm{NiX}}_4{]}^{2–}$. The number of unpaired electron/s in nickel and geometry of this complex ion are respectively _____.

The structure of which of the following chloro species can be explained on the basis of  $ds{p}^2$ hybridisation?

Hybridization and geometry of ${\left[\mathrm{Ni}(\mathrm{CN}{)}_4\right]}^{2-}$ are

Which is the appropriate combination of spin configuration and colour for the anionic complex ${\left[\mathrm{Co}(\mathrm{L}{)}_6\right]}^{3-}$ ($\mathrm{L}$  is a monodentate and monoanionic ligand)?

What is the geometry of ${\left[\mathrm{Cu}{\left({\mathrm{NH}}_3\right)}_4\right]}^{2+}$?

Match the following based on valence bond theory?

The geometries of $\left[\mathrm{Ni}(\mathrm{CO}{)}_4\right], {\left[{\mathrm{PtCl}}_4\right]}^{2-}$ and ${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$ respectively are:

Which among the following is most paramagnetic?

Highest magnetic moment is shown by which of the following complex ion-

The coordination compound which is inner orbital, paramagnetic and coloured

Give reason for the statement, ‘ ${\left[\mathrm{N}\mathrm{i}{\left(\mathrm{C}\mathrm{N}\right)}_4\right]}^{2-}$ is diamagnetic while ${\left[\mathrm{N}\mathrm{i}{\mathrm{Cl}}_4\right]}^{2-}$ is paramagnetic in nature’.

Select the d-electronic configuration which is likely to form an outer octahedral complex:

Which one of the following has the lowest value of paramagnetic behaviour?

Which of the following complex is an outer orbital complex?

Which one of the following has the regular tetrahedral structure?