Coordination Compounds — JEE Advanced PYQs

The total number of all possible isomers for the square planar complex with formula $\mathrm{K}[\mathrm{M}(\mathrm{NCS})({\mathrm{NO}}_2)($ gly $)$] is ____
( $\mathrm{M}=$ metal ion and gly $={\mathrm{NH}}_2{\mathrm{CH}}_2{\mathrm{COO}}^{-}$)

Consider that the coordinating atoms of the ligands in cis-$[\text{Co}({\text{NH}}_3{)}_4{\text{Cl}}_2]\text{Cl}$ and mer-$[\text{Co}({\text{NH}}_3{)}_3{\text{Cl}}_3]$ octahedral complexes are at the vertices of an octahedron. The sum of total number of the triangular faces in both the compl …

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

The sum of the spin only magnetic moment values (in B.M.) of ${\left[\mathrm{Mn}(\mathrm{Br}{)}_6\right]}^{3-}$ and ${\left[\mathrm{Mn}(\mathrm{CN}{)}_6\right]}^{3-}$ is ____.

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

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 $\mathrm{Ir}(\mathrm{CO}{)}_3$, t …

Among the following complexes, the total number of diamagnetic species is ____.
$[\mathrm{Mn}({\mathrm{NH}}_3{)}_6{]}^{3+}$, $[{\mathrm{MnCl}}_6{]}^{3-}$, $[{\mathrm{FeF}}_6{]}^{3-}$, $[{\mathrm{CoF}}_6{]}^{3-}$, $[\mathrm{Fe}({\mathrm{NH}}_3{)}_6{]}^{3+}$, and …

Among ${\left[\mathrm{Co}(\mathrm{CN}{)}_4\right]}^{4-},\left[\mathrm{Co}(\mathrm{CO}{)}_3(\mathrm{NO})\right],{\mathrm{XeF}}_4,{\left[{\mathrm{PCl}}_4\right]}^{+},{\left[{\mathrm{PdCl}}_4\right]}^{2-},{\left[{\mathrm{ICl}}_4\right]}^{-},{\left[\mathrm{Cu}(\mathrm{CN}{)}_4\right]}^{3-}$ …

When potassium iodide is added to an aqueous solution of potassium ferricyanide, a reversible reaction is observed in which a complex P is formed. In a strong acidic medium, the equilibrium shifts completely towards $\mathbf{P}$. Addition of zinc chloride to $\mathbf{P}$ in a …

When potassium iodide is added to an aqueous solution of potassium ferricyanide, a reversible reaction is observed in which a complex P is formed. In a strong acidic medium, the equilibrium shifts completely towards P. Addition of zinc chloride to P in a slightly acidic medium re …

The complex(es), which can exhibit the type of isomerism shown by $\left[\mathrm{Pt}{\left({\mathrm{NH}}_3\right)}_2{\mathrm{Br}}_2\right]$, is(are)

Match the electronic configurations in List-I with appropriate metal complex ions in List-II and choose the correct option.

[Atomic Number: $\mathrm{Fe}=26,\mathrm{Mn}=25,\mathrm{Co}=27$]

List-I
(P) ${\mathrm{t}}_{2\mathrm{g}}^6{\mathrm{e}}_{\mathrm{g}}^0$
(Q) …

The total number of possible isomers for $\left[\mathrm{Pt}{\left({\mathrm{NH}}_3\right)}_4{\mathrm{Cl}}_2\right]{\mathrm{Br}}_2$ is ____

The pair(s) of complexes wherein both exhibit tetrahedral geometry is(are)
(Note: py = pyridine
Given: Atomic numbers of $\mathrm{Fe},\mathrm{Co},\mathrm{Ni}$ and Cu are 26, 27, 28 and 29, respectively)

In an experiment, $m$ grams of a compound X (gas/liquid/solid) taken in a container is loaded in a balance as shown in figure I below. In the presence of a magnetic field, the pan with X is either deflected upwards (figure II), or deflected downwards (figure III), depending on …

Total number of cis N-Mn-Cl bond angles (that is, Mn-N and Mn-Cl bonds in cis positions) present in a molecule of cis-$\left[\mathrm{Mn}(\text{en}{)}_2{\mathrm{Cl}}_2\right]$ complex is ____

(en $={\mathrm{NH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{NH}}_2$)

The correct statement(s) regarding the binary transition metal carbonyl compounds is (are) (Atomic numbers: $\mathrm{Fe}=26,\mathrm{Ni}=28$)

Among the species given below, the total number of diamagnetic species is ____.

H atom, ${\mathrm{NO}}_2$ monomer, ${\mathrm{O}}_2{}^{-}$(superoxide), dimeric sulphur in vapour phase, …

The correct option(s) regarding the complex ${\left[\mathrm{Co}(\mathrm{en})({\mathrm{NH}}_3{)}_3({\mathrm{H}}_2\mathrm{O})\right]}^{3+}$ (en $={\mathrm{H}}_2{\mathrm{NCH}}_2{\mathrm{CH}}_2{\mathrm{NH}}_2$) is (are)

Match each set of hybrid orbitals from LIST-I with complex(es) given in LIST-II.
| Q. ${\mathrm{sp}}^3$ | 2. …

Addition of excess aqueous ammonia to a pink coloured aqueous solution of ${\mathrm{MCl}}_2\cdot 6{\mathrm{H}}_2\mathrm{O}$ (X) and ${\mathrm{NH}}_4\mathrm{Cl}$ gives an octahedral complex Y in the presence of air. In aqueous solution, complex Y behaves as 1:3 electrolyte. …

Among $[\mathrm{Ni}(\mathrm{CO}{)}_4]$, $[{\mathrm{NiCl}}_4{]}^{2-}$, $[\mathrm{Co}({\mathrm{NH}}_3{)}_4{\mathrm{Cl}}_2]\mathrm{Cl}$, ${\mathrm{Na}}_3[{\mathrm{CoF}}_6]$, ${\mathrm{Na}}_2{\mathrm{O}}_2$ and ${\mathrm{CsO}}_2$, the total number of paramagnetic compounds is

The number of geometric isomers possible for the complex $[{\mathrm{CoL}}_2{\mathrm{Cl}}_2{]}^{-}$ ($\mathrm{L}={\mathrm{H}}_2{\mathrm{NCH}}_2{\mathrm{CH}}_2{\mathrm{O}}^{-}$) is

In the following reaction sequence in aqueous solution, the species $\mathbf{X},\mathbf{Y}$ and $\mathbf{Z}$, respectively, are

The geometries of the ammonia complexes of ${\mathrm{Ni}}^{2+},{\mathrm{Pt}}^{2+}$ and ${\mathrm{Zn}}^{2+}$, respectively, are

For the octahedral complexes of ${\mathrm{Fe}}^{3+}$ in ${\mathrm{SCN}}^{-}$(thiocyanato-S) and in ${\mathrm{CN}}^{-}$ligand environments, the difference between the spin-only magnetic moments in Bohr magnetons (when approximated to the nearest integer) is
[Atomic number of …

In the complex acetylbromidodicarbonylbis(triethylphosphine)iron(II), the number of Fe-C bond(s) is

Among the complex ions, [Co(NH₂-CH₂-CH₂-NH₂)₂Cl₂]⁺, [CrCl₂(C₂O₄)₂]³⁻, [Fe(H₂O)₄(OH)₂]⁺, [Fe(NH₃)₂(CN)₄]⁻, [Co(NH₂-CH₂-CH₂-NH₂)₂(NH₃)Cl]²⁺ and [Co(NH₃)₄(H₂O)Cl]²⁺, the number of complex ion(s) that show(s) cis-trans isomerism is

An aqueous solution of metal ion $M1$ reacts separately with reagents $\mathbf{Q}$ and $\mathbf{R}$ in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution of another metal ion M2 always forms tetrahedral complexes wit …

An aqueous solution of metal ion $M1$ reacts separately with reagents $\mathbf{Q}$ and $\mathbf{R}$ in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution of another metal ion M2 always forms tetrahedral complexes wit …

Match each coordination compound in List-I with an appropriate pair of characteristics from List-II and select the correct answer using the code given below the lists.
{$\mathrm{en}={\mathrm{H}}_2{\mathrm{NCH}}_2{\mathrm{CH}}_2{\mathrm{NH}}_2$; atomic numbers: …

Consider the following complex ions, $P,Q$ and $R$.

The correct order of the complex ions, according to their spin-only magnetic moment values (in B.M.) is

The pair(s) of coordination complexes/ions exhibiting the same kind of isomerism is(are)

EDTA ${}^{4-}$ is ethylenediaminetetraacetate ion. The total number of $N-Co-O$ bond angles in $[Co(EDTA){]}^{1-}$ complex ion is

${\mathrm{NiCl}}_2{\left\{\mathrm{P}{\left({\mathrm{C}}_2{\mathrm{H}}_5\right)}_2\left({\mathrm{C}}_6{\mathrm{H}}_5\right)\right\}}_2$ exhibits temperature dependent magnetic behaviour (paramagnetic / diamagnetic). The coordination geometries of ${\mathrm{Ni}}^{2+}$ in the pa …

The colour of light absorbed by an aqueous solution of ${\mathrm{CuSO}}_4$ is

As per IUPAC nomenclature, the name of the complex $[\mathrm{Co}({\mathrm{H}}_2\mathrm{O}{)}_4({\mathrm{NH}}_3{)}_2]{\mathrm{Cl}}_3$ is

Among the following complexes (K-P), ${\mathrm{K}}_3\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]$ ($\mathbf{K}$), $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]{\mathrm{Cl}}_3$ ($\mathbf{L}$), ${\mathrm{Na}}_3\left[\mathrm{Co}(\text{oxalate}{)}_3\right]$ ( …

The equilibrium

in aqueous medium at 25 °C shifts towards the left in the presence of

The volume (in mL) of 0.1 $\mathrm{M}$ ${\mathrm{AgNO}}_3$ required for complete precipitation of chloride ions present in 30 mL of 0.01 M solution of $\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_5\mathrm{Cl}\right]{\mathrm{Cl}}_2$, as silver chloride is close …

Geometrical shapes of the complexes formed by the reaction of ${\mathrm{Ni}}^{2+}$ with ${\mathrm{Cl}}^{-},{\mathrm{CN}}^{-}$and ${\mathrm{H}}_2\mathrm{O}$, respectively, are

The correct structure of ethylenediaminetetraacetic acid (EDTA) is

The ionization isomer of $\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_4\mathrm{Cl}\left({\mathrm{NO}}_2\right)\right]\mathrm{Cl}$ is

The complex showing a spin-only magnetic moment of $2.82\mathrm{B}.\mathrm{M}$. is

Total number of geometrical isomers for the complex $\left[\mathrm{RhCl}(\mathrm{CO})({\mathrm{PPh}}_3)({\mathrm{NH}}_3)\right]$ is

The spin only magnetic moment value (in Bohr magneton units) of $\mathrm{Cr}(\mathrm{CO}{)}_6$ is

The number of water molecule(s) directly bonded to the metal centre in ${\mathrm{CuSO}}_4\cdot 5{\mathrm{H}}_2\mathrm{O}$ is

Both $[\mathrm{Ni}(\mathrm{CO}{)}_4]$ and $[\mathrm{Ni}(\mathrm{CN}{)}_4{]}^{2-}$ are diamagnetic. The hybridisations of nickel in these complexes, respectively, are

The IUPAC name of $[\mathrm{Ni}({\mathrm{NH}}_3{)}_4][{\mathrm{NiCl}}_4]$ is

Match the complexes in Column I with their properties listed in Column II. Indicate your answer by darkening the appropriate bubbles of the 4 × 4 matrix given in the ORS.
| (A) …