Co-ordination compounds practice · Medium

In all the following complexes, the coordination number of iron is six. In which of them is the oxidation state of iron the lowest?

Which of the following complex is optically inactive?

The donar sites of $\mathrm{[EDTA}]^{-4}$ are:

Which of the following complex is expected to be the most stable?

The shape of Wilkinson’s catalyst is

In ${\left[ {\mathrm{Cr}{{\left( {{\mathrm{C}_2}{\mathrm{O}_4}} \right)}_3}} \right]^{3 - }}$, the isomerism shown is:

Given below are two statements:
Statement I: ${\left[ {Ni{{\left( {CN} \right)}_4}} \right]^{2 - }}$ is square planar and diamagnetic complex, with $ds{p^2}$ hybridization for $Ni$ but $\left[ {Ni{{\left( {CO} \right)}_4}} \right]$ is tetrahedral, paramagnetic and with $s{p^3}$-hybridization for $Ni$.
Statement II: ${\left[ {NiC{l_4}} \right]^{2 - }}$ and $\left[ {Ni{{\left( {CO} \right)}_4}} \right]$ both have same $d$-electron configuration, have same geometry and are paramagnetic.
In light of the above statements, choose the correct answer from the options given below:

Assertion: $\left[\mathrm{CoF}_6\right]^{3-}$ is high spin complex.

Reason: $\mathrm{F}^{-}$ is strong field ligand.

Given below are two statements.

Statement-I: In $\mathrm{CuSO}_4 .5 \mathrm{H}_2 \mathrm{O}$, $Cu-O$ bonds are present.

Statement-II: In $\mathrm{CuSO}_4 .5 \mathrm{H}_2 \mathrm{O}$, ligands coordinating with $\mathrm{Cu}(\mathrm{II})$ ion are $\mathrm{O}$-and $\mathrm{S}$-based ligands.

In the light of the above statements, choose the correct answer from the options given below:

$\mathrm{Fe}^{3+}$ cation gives a Prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of:

In the complex ${\mathrm{K}_2}\left[ {\mathrm{Fe}{{\left( {\mathrm{CN}} \right)}_6}} \right]$

Dimethyl glyoxime forms a coloured complex with

The complex cation which has two isomers is:

Which complex compound is most stable?

The magnetic moment of an octahedral $\mathrm{Co}$ (II) complex is 4.0 B.M (nearly) The electronic configuration of the complex is

Type of isomerism which exists between $\left[{Pd}\left({C}_6 {H}_5\right)_2({SCN})_2\right]$ and $\left[{Pd}\left({C}_6 {H}_5\right)_2({NCS})_2\right]$ is :

Which among the following is incorrect regarding colour in coordination compounds?

The IUPAC name of ${Ni}({CO})_4$ is :

The correct sequence of ligands in the order of decreasing field strength is:

One mode of a complex compound $\mathrm{Co}{\left( {\mathrm{N}{\mathrm{H}_3}} \right)_5}\mathrm{C}{\mathrm{l}_3}$ gives three moles of ions on dissolution in water. One of the same complex reacts with two moles of $\mathrm{AgN}{\mathrm{O}_3}\mathrm{\;}$ solution to yield two moles of $\mathrm{AgCl}\left( s \right)$. The structure of the complex is

Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour?

Atomic numbers of $\;Cr\,\,\mathrm{and}\,\,Fe$ are respectively 24 and 26. Which of the following is paramagnetic with the spin of the electron?

Which of the following does not have optical isomer?

${NO}_3^{-}$is detected by ring test. Ring formed has formula

What is the magnetic moment of ${\left[ {\mathrm{Fe}{\mathrm{F}_6}} \right]^{3 - }}$?

In which of the following octahedral complexes of ${\mathrm{Co}}$ (at. No. 27), will be magnitude of ${\Delta _0}$ be the highest?

The hybridization involved in complex ${\left[ {\mathrm{Ni}{{\left( {\mathrm{CN}} \right)}_\mathrm{4}}} \right]^{\mathrm{2 - }}}$ is: (Atomic number of $\mathrm{Ni} = \,28$)

Which one of the following complexes is diamagnetic?

Yellow compound of lead chromate gets dissolved on treatment with hot $\mathrm{NaOH}$ solution. The product of lead formed is a :

The magnetic behavior of $\mathrm{Li}_{2} \mathrm{O}, \mathrm{Na}_{2} \mathrm{O}_{2}$ and $\mathrm{KO}_{2}$, respectively, are