Co-ordination compounds practice · Mixed difficulty

Which of the following complex species is not expected to exhibit optical isomerism?

Total number of electron count in ${Ni}({CO})_4$ and ${Fe}({CO})_5$ respectively are.

Consider the following complexes:
(I) ${K}_2 {PtCl}_6$
(II) ${PtCl}_4 .2 {NH}_3$
(III) ${PtCl}_4 .3 {NH}_3$
(IV) ${PtCl}_4 .5 {NH}_3$
Their electrical conductances in aq. solutions are-

The coordination number, oxidation state and the number of $d$ electrons of the metal in the complex $\left[{Co}\left({NH}_3\right)_5\left({CO}_3\right)\right] {Cl}$ are respectively

The total number of possible isomers for the complex compound $\left[ {\mathrm{Cu}{{\left( {\mathrm{N}{\mathrm{H}_3}} \right)}_4}} \right]\left[ {\mathrm{PtC}{\mathrm{l}_4}} \right]$

The complex ion which has the highest magnetic moment among the following is

Assertion : Penta ammiliethiocyanato-N-chromium(III) tetrachloridozincate(II) is a coloured compound and is an example of ionization isomerism.

Reason : The compound is paramagnetic and therefore, d-d transition is possible

Choose the correct order for $\Delta_{0}$ for the following complexes.

(I) $\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}\quad$ (II) $\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$

(III) $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}\quad$ (IV) $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$

Both geometrical and optical isomerisms are shown by

Which one of the following has highest number of isomers?

Which of the following will have maximum stabilization due to crystal field?

Which of the following is correct?

Assertion :- Neopentyl bromide and 2-bromo-2-methyl butane are enantiomers.

Reason :- Both have same molecular formula as well as structure formula.

Atomic number of ${Cr}$ and ${Fe}$ are respectively 25 and 26, which of the following is paramagnetic?

Which of the following represents a chelating ligand?

Assertion : The 'spin only' magnetic moment of a green complex, potassium amminetetracyani donitrosonium chromate(I) is 1.73 BM.

Reason : To have two d-orbitals empty for ${{\text{d}}^{\text{2}}}{\text{s}}{{\text{p}}^{\text{3}}}$ hybridisation, the pairing of electrons take place leaving behind one unpaired electron as ${\text{C}}{{\text{N}}^ - }$ is a stronger ligand.

Of the following complexes, the one with the largest value of the crystal field splitting is:

The number of isomeric forms in which ${\left[ {\mathrm{Co}{{\left( {\mathrm{N}{\mathrm{H}_3}} \right)}_4}\mathrm{C}{\mathrm{l}_2}} \right]^ + }$ ion can occur is:

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:

The number of unidentate ligands in the complex ion is called

Which of the following complex will show largest splitting of d-orbitals?

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

The shape of Wilkinson’s catalyst is

All ligands are:

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:

The correct order for the wavelengths of absorption in the visible region for the following is

I. $\left[\mathrm{Ni}\left(\mathrm{NO}_2\right)_6\right]^{4-}$ II. $\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}$ III. $\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$

For an octahedral complex, which of the following $d$ - electron configuration will give maximum CFSE?