Coordination Compounds — JEE Main PYQs

Match List I with List II

LIST-I (Substances)
A. Ziegler catalyst
B. Blood Pigment
C. Wilkinson catalyst
D. Vitamin B₁₂

LIST-II (Element Present)
I. Rhodium
II. Cobalt
III. Iron
IV. Titanium

Choose the correct answer from the options given below:

In which one of the following metal carbonyls, CO forms a bridge between metal atoms?

The correct IUPAC name of ${\mathrm{K}}_2{\mathrm{MnO}}_4$ is

The correct statements from following are:
A. The strength of anionic ligands can be explained by crystal field theory.
B. Valence bond theory does not give a quantitative interpretation of kinetic stability of coordination compounds.
C. The hybridization involved in formation of …

Aluminium chloride in acidified aqueous solution forms an ion having geometry

Choose the correct Statements from the following:
(A) Ethane-1 2-diamine is a chelating ligand.
(B) Metallic aluminium is produced by elecrtrolysis of aluminium oxide in presence of cryolite.
(C) Cyanide ion is used as ligand for leaching of silver.
(D) Phosphine act as a ligand …

Select the option with correct property -

The coordination geometry around the manganese in decacarbonyldimanganese(0)

Number of complexes which show optical isomerism among the following is ____.
cis $-{\left[\mathrm{Cr}(\mathrm{ox}{)}_2{\mathrm{Cl}}_2\right]}^{3-},{\left[\mathrm{Co}(\mathrm{en}{)}_3\right]}^{3+}$,
cis $-{\left[\mathrm{Pt}(\mathrm{en}{)}_2{\mathrm{Cl}}_2\right]}^{2+}$, cis …

Match List I with List II:
List-I: A. K₂[Ni(CN)₄] B. [Ni(CO)₄] C. [Co(NH₃)₆]Cl₃ D. Na₃[CoF₆]
List-II: I. sp³ II. sp³d² III. dsp² IV. d²sp³
Choose the correct answer from the options given below:

Match List I with List II:
List-I (Compound): A. Fe₄[Fe(CN)₆]₃·xH₂O B. [Fe(CN)₅NOS]⁴⁻ C. [Fe(SCN)]²⁺ D. (NH₄)₃PO₄·12MoO₃
List-II (Colour): I. Violet II. Blood Red III. Prussian Blue IV. Yellow
Choose the correct answer from the options given below:

Match List I with List II:
LIST-I (Complex ion): A. [Cr(H₂O)₆]³⁺ B. [Fe(H₂O)₆]³⁺ C. [Ni(H₂O)₆]²⁺ D. [V(H₂O)₆]³⁺
LIST-II (Electronic Configuration): I. t₂g² eg⁰ II. t₂g³ eg⁰ III. t₂g³ eg² IV. t₂g⁶ eg²
Choose the correct answer from the options given below:

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: The spin only magnetic moment value for $[\mathrm{Fe}(\mathrm{CN}{)}_6{]}^{3-}$ is 1.74 BM, whereas for $[\mathrm{Fe}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{3+}$ is 5.92 BM. …

Number of ambidentate ligands in a representative metal complex $\left[\mathrm{M}(\mathrm{en})(\mathrm{SCN}{)}_4\right]$ is
[en = ethylenediamine]

The IUPAC name of ${\mathrm{K}}_3[\mathrm{Co}({\mathrm{C}}_2{\mathrm{O}}_4{)}_3]$ is :-

Given below are two statements : one is labelled as "Assertion A" and the other is labelled as "Reason R".

Assertion A : In the complex $\mathrm{Ni}(\mathrm{CO}{)}_4$ and $\mathrm{Fe}(\mathrm{CO}{)}_5$, the metals have zero oxidation state.

Reason R: Low oxidation states ar …

The number of species having a square planar shape from the following is ____

${\mathrm{XeF}}_4$, ${\mathrm{SF}}_4$, ${\mathrm{SiF}}_4$, ${\mathrm{BF}}_4^{-}$, ${\mathrm{BrF}}_4^{-}$, ${\left[\mathrm{Cu}{\left({\mathrm{NH}}_3\right)}_4\right]}^{2+}$, …

The observed magnetic moment of the complex ${\left[\mathrm{Mn}(\underline{\mathrm{NCS}}{)}_6\right]}^{\mathrm{x}-}$ is 6.06 BM. The numerical value of x is ____:

The correct order of the number of unpaired electrons in the given complexes is
A. ${\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]}^{3-}$
B. ${\left[{\mathrm{FeF}}_6\right]}^{3-}$
C. ${\left[{\mathrm{CoF}}_6\right]}^{3-}$
D. ${\left[\mathrm{Cr}(\text{oxalate}{)}_3\right]}^{3-}$
E. …

Match List I with List II

List I: Complex
List II: Crystal Field splitting energy (${\Delta }_0$)

Choose the correct answer from the options given below:

For a metal ion, the calculated magnetic moment is 4.90 BM. This metal ion has ______ number of unpaired electrons.

Which of the following complex is octahedral, diamagnetic and the most stable?

The correct order of spin only magnetic moments for the following complex ions is

The octahedral diamagnetic low spin complex among the following is

In potassium ferrocyanide, there are ____ pairs of electrons in the ${\mathrm{t}}_{2\mathrm{g}}$ set of orbitals

The set which does not have ambidentate ligand(s) is

Which of the following complex has a possibility to exist as meridional isomer?

The complex that dissolves in water is

The ratio of spin-only magnetic moment values ${\mu }_{\text{eff }}{\left[\mathrm{Cr}(\mathrm{CN}{)}_6\right]}^{3-}/{\mu }_{\text{eff }}{\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$ is ____.

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : $[\mathrm{CoCl}({\mathrm{NH}}_3{)}_5{]}^{2+}$ absorbs at lower wavelength of light with respect to …

The magnetic moment is measured in Bohr Magneton (BM).
Spin only magnetic moment of Fe in ${\left[\mathrm{Fe}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$ and ${\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]}^{3-}$ complexes respectively is :

Match List I with List II.

\begin{tabular}{|l|l|l|l|}
\hline \multicolumn{2}{|c|}{ List I } & \multicolumn{2}{c|}{ List II } \\
Complex & \multicolumn{2}{|c|}{ Colour } \\
\hline A. & $\mathrm{Mg}\left({\mathrm{NH}}_4\right){\mathrm{PO}}_4$ & I. & Brown \\
\hline B. & …

If ${\mathrm{Ni}}^{2+}$ is replaced by ${\mathrm{Pt}}^{2+}$ in the complex ${\left[{\mathrm{NiCl}}_2{\mathrm{Br}}_2\right]}^{2-}$, which of the following properties are expected to get changed?
A. Geometry
B. Geometrical isomerism
C. Optical isomerism
D. Magnetic properties

Match List I with List II

LIST I (Complex) | LIST II (CFSE (${\Delta }_0$))
A. ${\left[\mathrm{Cu}{\left({\mathrm{NH}}_3\right)}_6\right]}^{2+}$ | I. -0.6
B. ${\left[\mathrm{Ti}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$ | II. -2.0
C. …

The mismatched combinations are
A. Chlorophyll - Co
B. Water hardness - EDTA
C. Photography - ${\left[\mathrm{Ag}(\mathrm{CN}{)}_2\right]}^{-}$
D. Wilkinson catalyst - $\left[{\left(P{h}_{3}P\right)}_{3}RhCl\right]$
E. Chelating ligand - D - Penicillamine

Choose the correct …

The total number of stereoisomers for the complex ${\left[\mathrm{Cr}(\mathrm{ox}{)}_2\mathrm{ClBr}\right]}^{3-}$ (where ox $=$ oxalate) is:

Which of the following complexes will exhibit maximum attraction to an applied magnetic field?

The complex with highest magnitude of crystal field splitting energy ( ${\Delta }_{\mathrm{o}}$ ) is

The homoleptic and octahedral complex of ${\mathrm{Co}}^{2+}$ and ${\mathrm{H}}_2\mathrm{O}$ has ____ unpaired electron(s) in the ${\mathrm{t}}_{2\mathrm{g}}$ set of orbitals.

The volume (in mL ) of $0.1\mathrm{M}{\mathrm{AgNO}}_3$ required for complete precipitation of chloride ions present in 20 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 ____

A solution of ${\mathrm{FeCl}}_3$ when treated with ${\mathrm{K}}_4\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]$ gives a prussiun blue precipitate due to the formation of

Which of the following are the example of double salt?
(A) ${\mathrm{FeSO}}_4\cdot {\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4\cdot 6{\mathrm{H}}_2\mathrm{O}$
(B) ${\mathrm{CuSO}}_4\cdot 4{\mathrm{NH}}_3\cdot {\mathrm{H}}_2\mathrm{O}$
(C) …

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

The magnetic moment of a transition metal compound has been calculated to be 3.87 B.M. The metal ion is

The primary and secondary valencies of cobalt respectively in $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\mathrm{Cl}\right]{\mathrm{Cl}}_2$ are :

An ammoniacal metal salt solution gives a brilliant red precipitate on addition of dimethylglyoxime. The metal ion is :

The d-electronic configuration of ${\left[{\mathrm{CoCl}}_4\right]}^{2-}$ in tetrahedral crystal field is $e^m{t}_2{}^n$. Sum of ' $m$ ' and 'number of unpaired electrons is ______.

Which of the following cannot be explained by crystal field theory?

The hybridization and magnetic behaviour of cobalt ion in ${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$ complex, respectively is

The number of paramagnetic species from the following is ______.
${\left[\mathrm{Ni}(\mathrm{CN}{)}_4\right]}^{2-}$, $\left[\mathrm{Ni}(\mathrm{CO}{)}_4\right]$, ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$
${\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]}^{4-}$, …