Coordination Compounds · JEE Advanced previous year questions

The correct order of the wavelength maxima of the absorption band in the ultraviolet-visible region for the given complexes is

1. A.$[\mathrm{Co}(\mathrm{CN}{)}_6{]}^{3-}<[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_6{]}^{3+}<[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_5({\mathrm{H}}_2\mathrm{O}){]}^{3+}<[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_5(\mathrm{Cl}){]}^{2+}$
2. B.$[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_5(\mathrm{Cl}){]}^{2+}<[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_5({\mathrm{H}}_2\mathrm{O}){]}^{3+}<[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_6{]}^{3+}<[\mathrm{Co}(\mathrm{CN}{)}_6{]}^{3-}$
3. C.$[\mathrm{Co}(\mathrm{CN}{)}_6{]}^{3-}<[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_5(\mathrm{Cl}){]}^{2+}<[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_5({\mathrm{H}}_2\mathrm{O}){]}^{3+}<[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_6{]}^{3+}$
4. D.$[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_6{]}^{3+}<[\mathrm{Co}(\mathrm{CN}{)}_6{]}^{3-}<[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_5(\mathrm{Cl}){]}^{2+}<[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_5({\mathrm{H}}_2\mathrm{O}){]}^{3+}$

During sodium nitroprusside test of sulphide ion in an aqueous solution, one of the ligands coordinated to the metal ion is converted to

1. A.$\mathrm{NO}{\mathrm{S}}^{-}$
2. B.$\mathrm{SC}{\mathrm{N}}^{-}$
3. C.$\mathrm{SN}{\mathrm{O}}^{-}$
4. D.$\mathrm{NC}{\mathrm{S}}^{-}$

Among the following options, select the option in which each complex in $\text{Set-I}$ shows geometrical isomerism and the two complexes in $\text{Set-II}$ are ionization isomers of each other. [en = ${\mathrm{H}}_2\mathrm{NC}{\mathrm{H}}_2\mathrm{C}{\mathrm{H}}_2\mathrm{N}{\mathrm{H}}_2$]

1. A.$\text{Set-I}$: $[\mathrm{Ni}(\mathrm{CO}{)}_4]$ and $[\mathrm{PdC}{\mathrm{l}}_2(\mathrm{PP}{\mathrm{h}}_3{)}_2]$; $\text{Set-II}$: $[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_5\mathrm{Cl}]\mathrm{S}{\mathrm{O}}_4$ and $[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_5(\mathrm{S}{\mathrm{O}}_4)]\mathrm{Cl}$
2. B.$\text{Set-I}$: $[\mathrm{Co}(\mathrm{en})(\mathrm{N}{\mathrm{H}}_3{)}_2\mathrm{C}{\mathrm{l}}_2]$ and $[\mathrm{PdC}{\mathrm{l}}_2(\mathrm{PP}{\mathrm{h}}_3{)}_2]$; $\text{Set-II}$: $[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_6][\mathrm{Cr}(\mathrm{CN}{)}_6]$ and $[\mathrm{Cr}(\mathrm{N}{\mathrm{H}}_3{)}_6][\mathrm{Co}(\mathrm{CN}{)}_6]$
3. C.$\text{Set-I}$: $[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_3(\mathrm{N}{\mathrm{O}}_2{)}_3]$ and $[\mathrm{Co}(\mathrm{en}{)}_2\mathrm{C}{\mathrm{l}}_2]$; $\text{Set-II}$: $[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_5\mathrm{Cl}]\mathrm{S}{\mathrm{O}}_4$ and $[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_5(\mathrm{S}{\mathrm{O}}_4)]\mathrm{Cl}$
4. D.$\text{Set-I}$: $[\mathrm{Cr}(\mathrm{N}{\mathrm{H}}_3{)}_5\mathrm{Cl}]\mathrm{C}{\mathrm{l}}_2$ and $[\mathrm{Co}(\mathrm{en})(\mathrm{N}{\mathrm{H}}_3{)}_2\mathrm{C}{\mathrm{l}}_2]$; $\text{Set-II}$: $[\mathrm{Cr}({\mathrm{H}}_2\mathrm{O}{)}_6]\mathrm{C}{\mathrm{l}}_3$ and $[\mathrm{Cr}({\mathrm{H}}_2\mathrm{O}{)}_5\mathrm{Cl}]\mathrm{C}{\mathrm{l}}_2\cdot {\mathrm{H}}_2\mathrm{O}$

Among $\mathrm{V}(\mathrm{CO}{)}_6$, $\mathrm{Cr}(\mathrm{CO}{)}_5$, $\mathrm{Cu}(\mathrm{CO}{)}_3$, $\mathrm{Mn}(\mathrm{CO}{)}_5$, $\mathrm{Fe}(\mathrm{CO}{)}_5$, $[\mathrm{Co}(\mathrm{CO}{)}_3{]}^{3-}$, $[\mathrm{Cr}(\mathrm{CO}{)}_4{]}^{4-}$, and $\mathrm{Ir}(\mathrm{CO}{)}_3$, the total number of species isoelectronic with $\mathrm{Ni}(\mathrm{CO}{)}_4$ is ____. [Given, atomic number: V = 23, Cr = 24, Mn = 25, Fe = 26, Co = 27, Ni = 28, Cu = 29, Ir = 77]

Among the following complexes, the total number of diamagnetic species is ____. $[\mathrm{Mn}(\mathrm{N}{\mathrm{H}}_3{)}_6{]}^{3+}$, $[\mathrm{MnC}{\mathrm{l}}_6{]}^{3-}$, $[\mathrm{Fe}{\mathrm{F}}_6{]}^{3-}$, $[\mathrm{Co}{\mathrm{F}}_6{]}^{3-}$, $[\mathrm{Fe}(\mathrm{N}{\mathrm{H}}_3{)}_6{]}^{3+}$, and $[\mathrm{Co}(\mathrm{en}{)}_3{]}^{3+}$ [Given, atomic number: Mn = 25, Fe = 26, Co = 27; en = ${\mathrm{H}}_2\mathrm{NC}{\mathrm{H}}_2\mathrm{C}{\mathrm{H}}_2\mathrm{N}{\mathrm{H}}_2$]

Among $[\mathrm{Co}(\mathrm{CN}{)}_4{]}^{4-}$, $[\mathrm{Co}(\mathrm{CO}{)}_3(\mathrm{NO})]$, $\mathrm{Xe}{\mathrm{F}}_4$, $[\mathrm{PC}{\mathrm{l}}_4{]}^{+}$, $[\mathrm{PdC}{\mathrm{l}}_4{]}^{2-}$, $[\mathrm{IC}{\mathrm{l}}_4{]}^{-}$, $[\mathrm{Cu}(\mathrm{CN}{)}_4{]}^{3-}$ and ${\mathrm{P}}_4$ the total number of species with tetrahedral geometry is ____.

Match the electronic configurations in List-I with appropriate metal complex ions in List-II and choose the correct option. [Atomic Number: $\mathrm{Fe}=26$, $\mathrm{Mn}=25$, $\mathrm{Co}=27$] $$\begin{array}{ll}\text{List-I}& \text{List-II}\\ \text{(P) }{\mathrm{t}}_{2g}^6{\mathrm{e}}_{\mathrm{g}}^0& \text{(1) }[\mathrm{Fe}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{2+}\\ \text{(Q) }{\mathrm{t}}_{2g}^3{\mathrm{e}}_{\mathrm{g}}^2& \text{(2) }[\mathrm{Mn}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{2+}\\ \text{(R) }{\mathrm{e}}^2{\mathrm{t}}_2^3& \text{(3) }[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_6{]}^{3+}\\ \text{(S) }{\mathrm{t}}_{2g}^4{\mathrm{e}}_{\mathrm{g}}^2& \text{(4) }[\mathrm{FeC}{\mathrm{l}}_4{]}^{-}\\ & \text{(5) }[\mathrm{CoC}{\mathrm{l}}_4{]}^{2-}\end{array}$$

1. A.$\mathrm{P}\to 1;\mathrm{Q}\to 4;\mathrm{R}\to 2;\mathrm{S}\to 3$
2. B.$\mathrm{P}\to 1;\mathrm{Q}\to 2;\mathrm{R}\to 4;\mathrm{S}\to 5$
3. C.$\mathrm{P}\to 3;\mathrm{Q}\to 2;\mathrm{R}\to 5;\mathrm{S}\to 1$
4. D.$\mathrm{P}\to 3;\mathrm{Q}\to 2;\mathrm{R}\to 4;\mathrm{S}\to 1$

The complex(es), which can exhibit the type of isomerism shown by $[\mathrm{Pt}(\mathrm{N}{\mathrm{H}}_3{)}_2\mathrm{B}{\mathrm{r}}_2]$, is(are) $[\mathrm{en}={\mathrm{H}}_2\mathrm{NC}{\mathrm{H}}_2\mathrm{C}{\mathrm{H}}_2\mathrm{N}{\mathrm{H}}_2]$

1. A.$[\mathrm{Pt}(\mathrm{en})(\mathrm{SCN}{)}_2]$
2. B.$[\mathrm{Zn}(\mathrm{N}{\mathrm{H}}_3{)}_2\mathrm{C}{\mathrm{l}}_2]$
3. C.$[\mathrm{Pt}(\mathrm{N}{\mathrm{H}}_3{)}_2\mathrm{C}{\mathrm{l}}_4]$
4. D.$[\mathrm{Cr}(\mathrm{en}{)}_2({\mathrm{H}}_2\mathrm{O})(\mathrm{S}{\mathrm{O}}_4){]}^{+}$