Coordination Compounds · JEE Main previous year questions

Given below are two statements: Statement I: $\mathrm{N}(\mathrm{C}{\mathrm{H}}_3{)}_3$ and $\mathrm{P}(\mathrm{C}{\mathrm{H}}_3{)}_3$ can act as ligands to form transition metal complexes. Statement II: As N and P are from same group, the nature of bonding of $\mathrm{N}(\mathrm{C}{\mathrm{H}}_3{)}_3$ and $\mathrm{P}(\mathrm{C}{\mathrm{H}}_3{)}_3$ is always same with transition metals. In the light of the above statements, choose the most appropriate answer from the options given below:

1. A.Both Statement I and Statement II are incorrect.
2. B.Both Statement I and Statement II are correct.
3. C.Statement I is incorrect but Statement II is correct.
4. D.Statement I is correct but Statement II is incorrect.

Match List I with List II LIST I (Compound) A. $\mathrm{F}{\mathrm{e}}_4[\mathrm{Fe}(\mathrm{CN}{)}_6{]}_3\cdot \mathrm{x}{\mathrm{H}}_2\mathrm{O}$ B. $[\mathrm{Fe}(\mathrm{CN}{)}_5\mathrm{NOS}{]}^{4-}$ C. $[\mathrm{Fe}(\mathrm{SCN}){]}^{2+}$ D. $(\mathrm{N}{\mathrm{H}}_4{)}_3\mathrm{P}{\mathrm{O}}_4\cdot 12Mo{\mathrm{O}}_3$ LIST II (Colour) I. Violet II. Blood Red III. Prussian Blue IV. Yellow Choose the correct answer from the options given below:

1. A.A-IV, B-I, C-II, D-III
2. B.A-I, B-II, C-III, D-IV
3. C.A-II, B-III, C-IV, D-I
4. D.A-III, B-I, C-II, D-IV

Match List I with List II $$\begin{array}{llll}& \text{LIST I}& & \text{LIST II}\\ & \text{(Complex ion)}& & \text{(Spin only magnetic moment in B.M.)}\\ \text{A.}& [\mathrm{Cr}(\mathrm{N}{\mathrm{H}}_3{)}_6{]}^{3+}& \text{I.}& 4.90\\ \text{B.}& [\mathrm{NiC}{\mathrm{l}}_4{]}^{2-}& \text{II.}& 3.87\\ \text{C.}& [\mathrm{Co}{\mathrm{F}}_6{]}^{3-}& \text{III.}& 0.0\\ \text{D.}& [\mathrm{Ni}(\mathrm{CN}{)}_4{]}^{2-}& \text{IV.}& 2.83\end{array}$$ Choose the correct answer from the options given below :

1. A.(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
2. B.(A)-(II), (B)-(III), (C)-(I), (D)-(IV)
3. C.(A)-(I), (B)-(IV), (C)-(II), (D)-(III)
4. D.(A)-(II), (B)-(IV), (C)-(I), (D)-(III)

Total number of unpaired electrons in the complex ions $[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_6{]}^{3+}$ and $[\mathrm{NiC}{\mathrm{l}}_4{]}^{2-}$ is ______.

Match List I with List II. | LIST I (Tetrahedral Complex) | LIST II (Electronic configuration) | | :--- | :--- | | A. ${\text{TiCl}}_4$ | I. ${\text{e}}^2,{\text{t}}_2^0$ | | B. $[{\text{FeO}}_4{]}^{2-}$ | II. ${\text{e}}^4,{\text{t}}_2^3$ | | C. $[{\text{FeCl}}_4{]}^{-}$ | III. ${\text{e}}^0,{\text{t}}_2^0$ | | D. $[{\text{CoCl}}_4{]}^{2-}$ | IV. ${\text{e}}^2,{\text{t}}_2^3$ | Choose the correct answer from the options given below :

1. A.(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
2. B.(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
3. C.(A)-(I), (B)-(III), (C)-(IV), (D)-(II)
4. D.(A)-(III), (B)-(IV), (C)-(II), (D)-(I)

The correct IUPAC name of $[{\text{PtBr}}_2({\text{PMe}}_3{)}_2]$ is :

1. A.bis(trimethylphosphine)dibromoplatinum(II)
2. B.dibromodi(trimethylphosphine)platinum(II)
3. C.dibromobis(trimethylphosphine)platinum(II)
4. D.bis[bromo(trimethylphosphine)]platinum(II)

The metal atom present in the complex $\mathrm{MABXL}$ (where $\mathrm{A},\mathrm{B},\mathrm{X}$ and $\mathrm{L}$ are unidentate ligands and $\mathrm{M}$ is metal) involves $\mathrm{s}{\mathrm{p}}^3$ hybridization. The number of geometrical isomers exhibited by the complex is :

1. A.0
2. B.2
3. C.3
4. D.4

Number of complexes from the following with even number of unpaired "d" electrons is ____ $[\mathrm{V}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{3+},[\mathrm{Cr}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{2+},[\mathrm{Fe}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{3+},[\mathrm{Ni}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{3+},[\mathrm{Cu}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{2+}$ [Given atomic numbers: $\mathrm{V}=23,\mathrm{Cr}=24,\mathrm{Fe}=26,\mathrm{Ni}=28,\mathrm{Cu}=29$]

1. A.1
2. B.5
3. C.2
4. D.4

The correct sequence of ligands in the order of decreasing field strength is :

1. A.$\mathrm{NC}{\mathrm{S}}^{-}>\mathrm{EDT}{\mathrm{A}}^{4-}>\mathrm{C}{\mathrm{N}}^{-}>\mathrm{CO}$
2. B.$\mathrm{CO}>{\mathrm{H}}_2\mathrm{O}>{\mathrm{F}}^{-}>{\mathrm{S}}^{2-}$
3. C.${\mathrm{S}}^{2-}>{}^{-}\mathrm{OH}>\mathrm{EDT}{\mathrm{A}}^{4-}>\mathrm{CO}$
4. D.${}^{-}\mathrm{OH}>{\mathrm{F}}^{-}>\mathrm{N}{\mathrm{H}}_3>\mathrm{C}{\mathrm{N}}^{-}$

The number of unpaired d-electrons in $[\text{Co}({\text{H}}_2\text{O}{)}_6{]}^{3+}$ is _________.

1. A.0
2. B.2
3. C.1
4. D.4

Which of the following complex is homoleptic?

1. A.$[\mathrm{Ni}(\mathrm{N}{\mathrm{H}}_3{)}_2\mathrm{C}{\mathrm{l}}_2]$
2. B.$[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_4\mathrm{C}{\mathrm{l}}_2{]}^{+}$
3. C.$[\mathrm{Fe}(\mathrm{N}{\mathrm{H}}_3{)}_4\mathrm{C}{\mathrm{l}}_2{]}^{+}$
4. D.$[\mathrm{Ni}(\mathrm{CN}{)}_4{]}^{2-}$

Given below are two statements : Statement (I) : A solution of $[\mathrm{Ni}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{2+}$ is green in colour. Statement (II) : A solution of $[\mathrm{Ni}(\mathrm{CN}{)}_4{]}^{2-}$ is colourless. In the light of the above statements, choose the most appropriate answer from the options given below :

1. A.Statement I is incorrect but Statement II is correct
2. B.Both Statement I and Statement II are correct
3. C.Both Statement I and Statement II are incorrect
4. D.Statement I is correct but Statement II is incorrect

$[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_6{]}^{3+}$ and $[\mathrm{Co}{\mathrm{F}}_6{]}^{3-}$ are respectively known as :

1. A.Inner orbital Complex, Spin paired Complex
2. B.Spin paired Complex, Spin free Complex
3. C.Spin free Complex, Spin paired Complex
4. D.Outer orbital Complex, Inner orbital Complex

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 $[\mathrm{Ni}(\mathrm{CN}{)}_4{]}^{2-}$ complex is $\mathrm{ds}{\mathrm{p}}^2$. D. The number of possible isomer(s) of cis- $[\mathrm{PtC}{\mathrm{l}}_2(\mathrm{en}{)}_2{]}^{2+}$ is one Choose the correct answer from the options given below:

1. A.B, C only
2. B.B, D only
3. C.A, C only
4. D.A, D only

Match List I with List II $$\begin{array}{llll}& \text{List - I (Complex ion)}& & \text{List - II (Electronic Configuration)}\\ \text{(A)}& [\mathrm{Cr}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{3+}& \text{(I)}& t_{2g}{}^2{e}_g^0\\ \text{(B)}& [\mathrm{Fe}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{3+}& \text{(II)}& t_{2g}{}^3{e}_g{}^0\\ \text{(C)}& [\mathrm{Ni}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{2+}& \text{(III)}& t_{2g}{}^3{e}_g{}^2\\ \text{(D)}& [\mathrm{V}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{3+}& \text{(IV)}& t_{2g}{}^6{e}_g^2\end{array}$$ Choose the correct answer from the options given below:

1. A.A-IV, B-I, C-II, D-III
2. B.A-III, B-II, C-IV, D-I
3. C.A-II, B-III, C-IV, D-I
4. D.A-IV, B-III, C-I, D-II

Choose the correct statements from the following : (A) Ethane-1, 2-diamine is a chelating ligand. (B) Metallic aluminium is produced by electrolysis of aluminium oxide in presence of cryolite. (C) Cyanide ion is used as ligand for leaching of silver. (D) Phosphine acts as a ligand in Wilkinson catalyst. (E) The stability constants of $\mathrm{C}{\mathrm{a}}^{2+}$ and $\mathrm{M}{\mathrm{g}}^{2+}$ are similar with EDTA complexes. Choose the correct answer from the options given below :

1. A.(B), (C), (E) only
2. B.(A), (D), (E) only
3. C.(C), (D), (E) only
4. D.(A), (B), (C) only

In which one of the following metal carbonyls, $\mathrm{CO}$ forms a bridge between metal atoms?

1. A.$[\mathrm{O}{\mathrm{s}}_3(\mathrm{CO}{)}_{12}]$
2. B.$[\mathrm{R}{\mathrm{u}}_3(\mathrm{CO}{)}_{12}]$
3. C.$[\mathrm{M}{\mathrm{n}}_2(\mathrm{CO}{)}_{10}]$
4. D.$[\mathrm{C}{\mathrm{o}}_2(\mathrm{CO}{)}_8]$

Consider the following complex ions $\mathrm{P}=[\mathrm{Fe}{\mathrm{F}}_6{]}^{3-}$ $\mathrm{Q}=[\mathrm{V}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{2+}$ $\mathrm{R}=[\mathrm{Fe}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{2+}$ The correct order of the complex ions, according to their spin only magnetic moment values (in B.M.) is :

1. A.$\mathrm{R}<\mathrm{Q}<\mathrm{P}$
2. B.$\mathrm{R}<\mathrm{P}<\mathrm{Q}$
3. C.$\mathrm{Q}<\mathrm{R}<\mathrm{P}$
4. D.$\mathrm{Q}<\mathrm{P}<\mathrm{R}$

The Spin only magnetic moment value of square planar complex $[\text{Pt}({\text{NH}}_3{)}_2\text{Cl }({\text{NH}}_2{\text{CH}}_3)]\text{Cl}$ is _______ B.M. (Nearest integer) (Given atomic number for $\text{Pt}=78$)

The mismatched combinations are A. Chlorophyll - Co B. Water hardness - EDTA C. Photography $-{\left[\mathrm{Ag}(\mathrm{CN}{)}_2\right]}^{-}$ D. Wilkinson catalyst $-\left[({\mathrm{Ph}}_3\mathrm{P}{)}_3\mathrm{RhCl}\right]$ E. Chelating ligand - D-Penicillamine Choose the correct answer from the options given below :

1. A.A and E Only
2. B.D and E Only
3. C.A and C Only
4. D.A, C, and E Only

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

1. A.$1$
2. B.$3$
3. C.$2$
4. D.$4$

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

1. A.$[\mathrm{Ni}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{2+}$
2. B.$[\mathrm{Co}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{2+}$
3. C.$[\mathrm{Co}(\mathrm{en}{)}_3{]}^{3+}$
4. D.$[\mathrm{Zn}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{2+}$

Match List I with List II | LIST I Complex | | LIST II CFSE (${\Delta }_0$) | | :--- | :--- | :--- | | A. $[\mathrm{Cu}(\mathrm{N}{\mathrm{H}}_3{)}_6{]}^{2+}$ | I. | $-0.6$ | | B. $[\mathrm{Ti}({\mathrm{H}}_2\mathrm{O}{)}_6{]}^{3+}$ | II. | $-2.0$ | | C. $[\mathrm{Fe}(\mathrm{CN}{)}_6{]}^{3-}$ | III. | $-1.2$ | | D. $[\mathrm{Ni}{\mathrm{F}}_6{]}^{4-}$ | IV. | $-0.4$ | Choose the correct answer from the options given below:

1. A.A-I, B-IV, C-II, D-III
2. B.A-III, B-IV, C-I, D-II
3. C.A-II, B-III, C-I, D-IV
4. D.A-I, B-II, C-IV, D-III

The complex that dissolves in water is :

1. A.$\mathrm{F}{\mathrm{e}}_4[\mathrm{Fe}(\mathrm{CN}{)}_6{]}_3$
2. B.$(\mathrm{N}{\mathrm{H}}_4{)}_3[\mathrm{As}(\mathrm{M}{\mathrm{o}}_3{\mathrm{O}}_{10}{)}_4]$
3. C.${\mathrm{K}}_3[\mathrm{Co}(\mathrm{N}{\mathrm{O}}_2{)}_6]$
4. D.$[\mathrm{F}{\mathrm{e}}_3(\mathrm{OH}{)}_2(\mathrm{OAc}{)}_6]\mathrm{Cl}$

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

1. A.${\mathrm{C}}_2{\mathrm{O}}_4^{2-},\mathrm{N}{\mathrm{O}}_2^{-},\mathrm{NC}{\mathrm{S}}^{-}$
2. B.${\mathrm{C}}_2{\mathrm{O}}_4^{2-}$, ethylene diamine, ${\mathrm{H}}_2\mathrm{O}$
3. C.$\mathrm{N}{\mathrm{O}}_2^{-},{\mathrm{C}}_2{\mathrm{O}}_4^{2-},\mathrm{EDT}{\mathrm{A}}^{4-}$
4. D.$\mathrm{EDT}{\mathrm{A}}^{4-},\mathrm{NC}{\mathrm{S}}^{-},{\mathrm{C}}_2{\mathrm{O}}_4^{2-}$