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

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

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?

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 ?

The sum of oxidation state and co-ordination number of central metal atom is maximum with respect to which of the following complex?

$ \text { Match the following. } $

$ \begin{array}{llll} \hline & \begin{array}{l} \text { List-I } \\ (\text { Complex }) \end{array} & & \begin{array}{l} \text { List-II } \\ \text { (Spin only magnetic } \\ \text { moment) } \end{array} \\ \hline \text { A. } & {\left[\mathrm{CoF}_6\right]^{3-}} & \text { I. } & 0 \\ \hline \text { B. } & {\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}} & \text { II. } & \sqrt{24} \\ \hline \text { C. } & {\left[\mathrm{FeF}_6\right]^{3-}} & \text { III. } & \sqrt{8} \\ \hline \text { D. } & {\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-}} & \text { IV. } & \sqrt{35} \\ \hline & & \text { V. } & \sqrt{15} \\ \hline \end{array} $

The correct answer is

Identify the correct set for $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ ion.

(Hybridisation of $\mathrm{Co}^{3+}$, type of complex, number of unpaired electrons in the complex ion respectively.)

• According to Werner's theory, the number of groups bonded to the central metal atom/ion in a coordination complex represent.

Identify the incorrect match from the following.

$ \text { Match the following } $

$ \text { The correct match } $

Secondary valences of the following complexes based on their reactions with excess $\mathrm{AgNO}_3$ are

The pair in which both the species have same magnetic moment (spin only) is

A metal complex absorbed orange light. The colour in which it appears is

Among the given complexes the possess " $\mathrm{CO}^{\prime \prime}$ as a bridged ligands are

I. $\left[\mathrm{Co}_2(\mathrm{CO})_8\right]$

II. $\left[\mathrm{Fe}_3(\mathrm{CO})_{12}\right]$

III. $\left[\mathrm{Mn}_2(\mathrm{CO})_{10}\right]$

IV. $\left[\mathrm{Fe}_2(\mathrm{CO})_9\right]$

The correct order of decreasing field strength of the below given ligands is

Which of the following correctly represents the order of ligands in spectrochemical series?

When $\left[\mathrm{Ti}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_3$ is heated at $250^{\circ} \mathrm{C}$, the change in colour is from

Which compound is zero valent metal complex?

The correct match for complex with its magnetic behaviour in the following is

$A^{2+}, B^{2+}$ and $C^{-}$form an ionic complex like $A_{x-2}\left[B(C)_x\right]_2$. If the complex is $75 \%$ dissociated in a solvent with $i=4$, the coordination number of $B$ is

Which of the following molecules is colourless?