Valence Bond Theory

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?

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

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:

Low spin complex is formed by

Which of the following complex is not correctly matched with its geometry?

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?

${\mathrm{NiCl}}_2$ in alkaline medium is treated with$῾\mathrm{A᾽}$ to give a complex$῾\mathrm{B}᾽$, which is a rosy-red precipitate. The incorrect statement about $\mathrm{A}$ and $\mathrm{B}$ is:

The magnetic moment (in ${\mu }_{\mathrm{B}}$) of $\left[\mathrm{Ni}(\mathrm{dimethylglyxoimate}{)}_2\right]$ complex is closest to:

Among the following, the square planar geometry is exhibited by:

What happens if $\mathrm{NO}$ reacts with $\left[\mathrm{Cr}{\left(\mathrm{CO}\right)}_6\right]$?

Which of the following statements is not true?