Coordination Compounds - Inorganic Chemistry - Chemistry Previous Year Questions

Arrange the following in increasing order of their crystal field splitting energy

I. $\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}$

II. $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$

III. $\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3-}$

IV. $\left[\mathrm{CoF}_{6}\right]^{3-}$

$\mathrm{Pt}+3: 1$ mixture of $\left(\right.$ Conc. $\mathrm{HCl}+$ conc. $\left.\mathrm{HNO}_3\right) \rightarrow[\mathrm{X}]^{2-}$

What is the oxidation state of Pt in $[\mathrm{X}]^{2-}$ complex ion ?

When 100 mL of 0.2 M solution of $\mathrm{CoCl}_3 \cdot x \mathrm{NH}_3$ is treated with excess of $\mathrm{AgNO}_3$ solution, $3.6 \times 10^{22}$ ions are precipitated. The value of $x$ is $\left(N=6 \times 10^{23} \mathrm{~mol}^{-1}\right)$

Which one of the following is not an ambidenate ligand?

Total number of geometrical isomers possible for the complexes $\left[\mathrm{NiCl}_4\right]^{2-}$, $\left[\mathrm{CoCl}_2\left(\mathrm{NH}_3\right)_4\right]^{+}$, $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3\left(\mathrm{NO}_2\right)_3\right]$ and $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right]^{2+}$ is

Arrange the following complexes in the increasing order of their spin only magnetic moment (in B.M)

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

II. $\left[\mathrm{MnCl}_4\right]^{2-}$

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

IV. $\left.\left[\mathrm{Cr}(\mathrm{NH})_3\right)_6\right]^{3+}$

$$\text { Observe the following complex ions }$$

$$\begin{array}{cccc} \hline\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-} & {\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}} & {\left[\mathrm{CoF}_6\right]^{3-}} & {\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}} \\ \hline A & B & C & D \\ \hline \end{array}$$

Identify the option in which the unpaired electrons in the complex ions are in correct increasing order

Which one of the following complex ions is diamagnetic in nature?