Coordination Compounds · JEE Advanced previous year questions

2024 4 questions

1. Q382024 · 26 May 2024 · Paper 1

   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 $[\mathrm{Cr}({\mathrm{H}}_2\mathrm{O}{)}_5\mathrm{Cl}]\mathrm{C}{\mathrm{l}}_2\cdot {\mathrm{H}}_2\mathrm{O}$
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   Answer: C

2. Q452024 · 26 May 2024 · Paper 1· Numerical answer

   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]

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   Answer: 3

3. Q472024 · 26 May 2024 · Paper 1· Numerical answer

   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 = ${\mathrm{H}}_2\mathrm{NC}{\mathrm{H}}_2\mathrm{C}{\mathrm{H}}_2\mathrm{N}{\mathrm{H}}_2$]

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   Answer: 1

4. Q462024 · 26 May 2024 · Paper 2· Numerical answer

   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 ____.

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   Answer: 4 or 5