List of top Chemistry Questions on Coordination Compounds

why is \([Ni(H_2O)_6]^{2+}\) coloured ? [Atomic number of Ni = 28]

A coordination compound \(CrCl_3 \cdot 6H_2O\) is mixed with excess of \(AgNO_3\) solution, two moles of \(AgCl\) are precipitated per mole of the compound. Write the structural formula of the coordination compound.

Differentiate between homoleptic complex and heteroleptic complex.

Name two coordination compounds which are important in biological systems. (ii) What is meant by chelate effect ? Give an example. (iii) Why are low spin tetrahedral complexes rarely formed ?

Which of the following ligands forms a chelate complex ?

The oxidation number of Co in [Co(NH$_3$)$_5$(ONO)]SO$_4$ is :

According to Werner's theory, the primary valencies of the central metal atom:

The oxidation number of Co in \([Co(en)_3]_2(SO_4)_3\) is:

Which one of the following complexes has least number of stereoisomers?

Which of the following will give maximum number of isomers?

When Propene is treated with $\mathrm{HBr}$ in the presence of peroxides, the major product formed is:}

The pairs of ions which exhibit same colour in aquated state are: I. \[ Fe^{2+}, Ni^{2+} \] II. \[ V^{2+}, Cr^{2+} \] III. \[ Cr^{2+}, Cu^{2+} \]

X, Y are the complexes of \(M^{n+}\) ion. The spin only magnetic moment values of X, Y respectively are 3.87 BM, 1.73 BM. \(M^{n+}\) is:

Identify the reactions, in which products are correctly given: I. \[ IBr + H_2O \rightarrow HI + HOBr \] II. \[ ClF_3 + H_2O \rightarrow HF + HOClO \] III. \[ IF_5 + H_2O \rightarrow HF + HIO_3 \]

The number of geometrical isomers possible for the complex \([Co(en)_2Cl_2]^+\) is:

Write IUPAC names of the following coordination compounds:

(i) \([Ag(NH_3)_2][Ag(CN)_2]\)

(ii) \(K_3[Fe(C_2O_4)_3]\)

The secondary valency of Co in the complex \([Co(NH_3)_5(NO_2)]^{2+}\) is

Consider the following table of three lanthanoid ions X, Y, and Z and their properties.

Atomic numbers of Ce, Eu, and Lu are 58, 63, and 71, respectively. Given these atomic numbers, the lanthanoid ions X, Y, and Z, respectively, are:

Consider the following complex ions:
$[\text{Ni(CN)}_4]^{2-}$, $[\text{Fe(CN)}_6]^{3-}$, $[\text{Cu(H}_2\text{O)}_6]^{2+}$, and $[\text{Co(CN)}_6]^{3-}$.
The complex ions that are expected to show diamagnetic behavior at room temperature are:

The increasing order of acidic strength for the aqua complexes $[\text{V}(\text{H}_2\text{O})_6]^{2+}$, $[\text{Fe}(\text{H}_2\text{O})_6]^{2+}$, $[\text{Fe}(\text{H}_2\text{O})_6]^{3+}$, and $[\text{Co}(\text{H}_2\text{O})_6]^{3+}$ is:

The complex \([\mathrm{Co(NH_3)_6]^{3+}\) is:}

What is meant by chelate effect ? Give an example.

Define the following terms with a suitable example in each case :
(i) Ambidentate ligand
(ii) Double salt

The oxidation number of Pt in $\mathrm{[Pt(en)_2Cl_2]^{2+}}$ is :

Which of the following exhibit optical isomerism? I. \([Fe(C_2O_4)_3]^{3-}\) II. \([Cr(H_2O)_4Cl_2]^+\) III. \([Co(NH_3)_2(en)_2]^{3+}\)