JEE Coordination Compounds PYQs with Solutions PDF

Given below are two statements:
Statement I : Crystal Field Stabilization Energy (CFSE) of $$\left[Cr\left( H_{2}O \right)_{6} \right]^{2+}$$ is greater than that of $$\left[Mn\left( H_{2}O \right)_{6} \right]^{2+}$$.
Statement II: Potassium ferricyanide has a greater spin-only magnetic moment than sodium ferrocyanide.
In the light of the above statements, choose the correct answer from the options given below :

Identify the metal ions among $$Co^{2+}, Ni^{2+}, Fe^{2+}, V^{3+} \text{ and } Ti^{2+}$$ having a spin-only magnetic moment value more than 3.0 BM. The sum of unpaired electrons present in the high spin octahedral complexes formed by those metal ions is __________.

Given below are two statements:
Statement I: Among $$[Cu(NH_{3})_{4}]^{2+},[Ni(en)_{3})]^{2+},[Ni(NH_{3})_{6}]^{2+}\text{ and }[Mn(H_{2}O)_{6}]^{2+},[Mn(H_{2}O)_{6}]^{2+}$$ has the maximum number of unpaired electrons.
Statement II : The number of pairs among $$\left\{[Ni(Cl_{4}]^{2-},[Ni(CO)_{4}]\right\},\left\{[NiCl_{4}]^{2-},[Ni(CN)_{4}]^{2-}\right\} and \left\{[Ni(CO)_{4}],[Ni(CN)_{4}]^{2-}\right\}$$ that contain only diamagnetic species is two.
ln the light of the above statements, choose the correct answer from the options given below:

Consider the following reactions.
$$PbCl_{2}+K_{2}CrO_{4}\rightarrow A+2KCI$$
(Hot solution)
$$A+NaOH\rightleftharpoons B+Na_{2}CrO_{4}$$
$$PbSO_{4}+4CH_{3}COONH_{4}\rightarrow (NH_{4})_{2}SO_{4}+X$$
In the above reactions, A, Band X are respectively.

Given below are two statements:
Statement I :
The number of species among $$SF_{4},NH_4^+,[NiCl_{4}]^{2-},XeF_{4},[PtCl_{4}]^{2-},SeF_{4}\text{ and }[Ni(CN)_{4}]^{2-}$$, tha t have tetrahedral geometry is 3.
Statement II :
In the set $$[NO_{2},BeH_{2},BF_{3},AlCl_{3}]$$ all the molecules have incomplete octet around central atom.
In the light of the above statements, choose the correct answer from the options given below :

$$[Ni (PPh_{3})_{2}Cl_{2} ]$$ is a paramagnetic complex. Identify the INCORRECT statements about this complex.
A. The complex exhibits geometrical isomerism.
B. The complex is white in colour.
C. The calculated spin-only magnetic moment of the complex is 2.84 BM.
D. The calculated CFSE (Crystal Field Stabilization Energy) of Ni in this complex is $$-0.8 \triangle_{0}$$
E. The geometrical arrangement of ligands in this complex is similar to that in $$Ni(CO)_{4}$$.
Choose the correct answer from the options given below :

The statements that are incorrect about the nickel(II) complex of dimethylglyoxime are:
A. It is red in colour.
B. It has a high solubility in water at pH =9.
C. The Ni ion has two unpaired d-electrons.
D. The N - Ni - N bond angle is almost close to 90°
E. The complex contains four five-membered metallacycles (metal containing rings).
Choose the correct answer from the options given below :

Given below are two statements :
Statement I: $$[CoBr_{4}]^{2-}$$ ion will absorb light of lower energy than $$[CoCl_{4}]^{2-}$$ ion.
Statement II: In $$[Col_{4}]^{2-}$$ ion, the energy separation between the two set of d-orbitals is more than $$[CoCl_{4}]^{2-}$$ ion.
ln the light of the above statements, choose the correct answer from the options given below:

The crystal field splitting energy of $$[Co(oxalate)_{3}]^{3-}$$ complex is 'n' times that of the $$[Cr(oxalate)_{3}]^{3-}$$ complex. Here 'n' is_______. (Assume d $$\triangle_{\circ} > > P$$)

A first row transition metal (M) does not liberate $$H_{2}$$ gas from dilute HCI. 1 mol of aqueous solution of $$MSO_{4}$$ is treated with excess of aqueous KCN and then $$H_{2} S(g)$$ is passed through the solution. The amount of MS (metal sulphide) formed from the above reaction is _______ mol.

Two p-block elements $$X$$ and $$Y$$ form fluorides of the type $$EF_{3}$$. The fluoride compound $$XF_{3}$$ is a Lewis acid and $$YF_{3}$$ is a Lewis base. The hybridizations of the central atoms of $$XF_{3}$$ and $$YF_{3}$$ respectively are

Given below are h¥o statements:
Statement I: Hybridisation, shape and spin only magnetic moment of $$K_{3}[Co(CO_{3})_{3}]$$ is $$sp^{3}d^{2}$$, octahedral and 4.9 BM respectively.
Statement II: Geometty, hybridisation and spin only magnetic moment values (BM) of the ions $$[Ni(CN)_{4}]^{2-},[MnBr_{4}]^{2-}\text{ and }[CoF_{6}]^{3-}$$ respectively are square planar, tetrahedral, octahedral;$$dsp^{2},sp^{3},sp^{3}d^{2}$$ and 0, 5.9, 4.9.
In the light of the above statements, choose the correct answer from the options given below

Consider a mixtm-e 'X' which is made by dissolving 0.4 mol of $$[Co(NH_{3})_{5}SO_{4}]Br$$ and 0.4 mol of $$[Co(NH_{3})_{5}Br]SO_{4}$$ in water to make 4 L of solution. When 2 L of mixture 'X' is allowed to react with excess of $$AgNO_{3}$$,it fonns precipitate 'Y'. The rest 2 L of mixture 'X' reacts with excess $$BaCl_{2}$$ to fonn precipitate 'Z'. Which of the following statements is CORRECT?

Given below are two statements:
Statement I: The number of paramagnetic species among $$[CoF_{6}]^{3-},[TiF_{6}]^{3-},V_{2}O_{5}\text{ and }[Fe(CN)_{6}]^{3-}$$ is 3.
Statement II: $$K_{4}[Fe(CN)_{6}] < K_{3}[Fe(CN)_{6}] < [Fe(H_{2}O)_{6}]SO_{4}.H_{2}O < [Fe(H_{2}O)_{6}]Cl_{3}$$ is the correct order in terms of number of unpaired electron(s) present in the complexes.
In the light of the above statements, choose the correct answer from the options given below

Among the following, the CORRECT combinations are
$$\text{A. IF}_{3} \rightarrow \text{T-shaped}(\text{sp}^{3}\text{d})$$
$$\text{B. IF}_{5} \rightarrow \text{Square pyramidal(sp}^{3}\text{d}^{2})$$
$$\text{C. IF}_{7} \rightarrow \text{Pentagonal bipyrnmidal(sp}_{3}\text{d}^{3})$$
$$\text{D. ClO}_{4}^{-} \rightarrow \text{Square planar(sp}^{3}\text{d})$$
Choose the correct answer from the options given below:

The wavelength of light absorbed for the following complexes are in the order
(I)$$\left[Co{(NH_{3})}_{6}\right]^{3+}$$
(II)$$\left[Co{(H_{2}O)}_{6}\right]^{3+}$$
(III)$$\left[Co{(CN)}_{6}\right]^{3-}$$
(IV)$$\left[Co(NH_{3})_{5}(H_{2}O)\right]^{3+}$$
(V)$$\left[CoF_{6}\right]^{3-}$$

A chromium complex with a formula $$CrCl_{3}.6H_{2}O$$ has a spin only magnetic moment value of 3.87 BM and its solution conductivity corresponds to 1:2 electrolyte. 2.75 g of the complex solution was initially passed through a cation exchanger. The solution obtained after the process was reacted with excess of $$AgNO_{3}$$. The amount of AgCI formed in the above process is __ g. (Nearest
integer)
[Given: Molar massing $$mol^{-1}$$ Cr:52; Cl:35.5, Ag:108, 0:16, H:1]

The correct statement among the followring is:

X is the number of geometrical isomers exhibited by $$[Pt(NH_{3})(H_{2}O)BrCl]$$.
Y is the number of optically inactive isomer(s) exhibited by $$[CrCl_{2}(ox)_{2}]^{3-}$$
z is the number of geometrical isomers exhibited by $$[Co(NH_{3})_{3}(NO_{2})_{3}]$$.
The value of X + Y + Z is________.

Identify the CORRECT set of details from the following:

A. $$[Co(NH_3)_6]^{3+}$$ : Inner orbital compex; $$d^{2}sp^{3}$$ hybridized

B. $$[MnCl_6]^{3-}$$ : Outer orbital complex; $$sp^{3}d^{2}$$ hybridized

C. $$[CoF_6]^{3-}$$ : Outer orbital complex; $$d^{2}sp^{3}$$ hybridized

D. $$[FeF_6]^{3-}$$ : Outer orbital complex; $$sp^{3}d^{2}$$ hybridized

E. $$[Ni(CN)_4]^{2-}$$ : Inner orbital complex; $$sp^{3}d^{2}$$ hybridized

Choose the correct answer from the options given below:

Total number of unpaired electrons present in the central met al atoms/ions of
$$[Ni(CO)_4],[NiCl_4]^{2-},[PtCl_2(NH_3)_2],[Ni(CN)_4]^{2-} \text {and } [Pt(CN)_4]^{2-}$$ is_____

The correct increasing o rd e r of spin-only magnetic moment values of the complex ions $$[MnBr_{4}]^{2-}(A),[Cu(H_{2}O)_{6}]^{2+}(B),[Ni(CN)_{4}]^{2-}(C)\text{ and }[Ni(H_{2}O)_{6}]^{2+}(D)$$ is:

Match List - I with List - Il according to shape.
List - I                      List - II
A. $$ XeO_3 $$                   I.     $$ BrF_5 $$
B. $$ XeF_2 $$                    II.    $$ NH_3 $$
C. $$ XeO_2 F_2 $$              III.   $$ [I_3]^-{} $$
D. $$ XeOF_4 $$                IV.   $$ SF_4 $$
Choose the correct answer from the options given below:

Consider the following statements about manganate and permanganate ions. Identify the correct statements.
A. The geometry of both manganate and permanganate ions is tetrahedral
B. The oxidation states of Mn in manganate and permanganate are + 7 and + 6, respectively.
C. Oxidation of Mn(II) salt by peroxodisulphate gives manganate ion as the final product.
D. Manganate ion is paramagnetic and permanganate ions is diamagnetic.
E. Acidified permanganate ion reduces oxalate, nitrite and iodide ions.
Choose the correct answer from the options given below :

The numbei of isoelectronic species among $$Sc^{3+},Cr^{2+},Mn^{3+},Co^{3+}\text{ and }Fe^{3+}$$ is 'n'. If 'n' moles of AgCl is formed during the reaction of complex with formula $$CoCl_{3}(en)_{2}NH_{3}$$ with excess of $$AgNO_{3}$$ solution, then the number of electrons present in the $$t_{2g}$$ orbital of the complex is ________.

The correct order of the following complexes in terms of their crystal field stabilization energies is :

Identify the homoleptic complex(es) that is/are low spin. $$(A)[Fe(CN)_{5}NO]^{2-}(B)[CoF_{6}]^{3-}(C)[Fe(CN)_{6}]^{4-}(D)[Co(NH_{3})_{6}]^{3+}(E)[Cr(H_{2}O)_{6}]^{2+}$$ Choose the correct answer from the options given below :

The complex of $$Ni^{2+}$$ ion and dimethyl glyoxime contains ________ number of Hydrogen (H) atoms.

In which of the following complexes the CFSE, $$\triangle_o$$ will be equal to zero?

From the magnetic behaviour of $$[NiCl_4]^{2-} \text{(paramagnetic) and } [Ni(CO)_4] $$ (diamagnetic), choose the correct geometry and oxidation state.

Identify the coordination complexes in which the central metal ion has $$d^{4}$$ configuration.

Choose the correct answer from the options given below :

One mole of the octahedral complex compound  $$Co(NH_3)_5Cl_3$$  gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with excess  $$AgNO_3$$ solution to yield two moles of  $$AgCl(s).$$  The structure of the complex is:

Find the compound ' A ' from the following reaction sequences.

yellow ppt

{The conditions and consequence that favours the  $$t_{2gg} e_g^1$$  configuration in a metal complex are:

The metal ion whose electronic configuration is not affected by the nature of the ligand and which gives a violet colour in non-luminous flame under hot condition in borax bead test is

Choose the correct answer from the options given below :

The correct increasing order of stability of the complexes based on $$\Delta_{\circ}$$ value is: I.$$[Mn(CN)_{6}]^{3}$$ II.$$[Co(CN)_{6}]^{4-}$$ III.$$[Fe(CN)_{6}]^{4-}$$ IV.$$[Fe(CN)_{6}]^{3-}$$

The complex that shows Facial - Meridional isomerism is:

$$CrCl_{3}\cdot xNH_{3}$$ can exist as a complex. 0.1 molal aqueous solution of this complex shows a depression in freezing point of $$0.558^{\circ}C$$. Assuming 100% ionisation of this complex and coordination number of Cr is 6 , the complex will be (Given $$K_{f}$$ = 1.86 K kg $$mol^{-1}$$)

The d- electronic configuration of an octahedral Co(II) complex having magnetic moment of 3.95 BM is:

Identify the homoleptic complexes with odd number of d electrons in the central metal : (A) $$[FeO_4]^{2-}$$ (B) $$[Fe(CN)_6]^{3-}$$ (C) $$ [Fe(CN)_5NO]^{2-}$$ (D) $$[CoCl_4]^{2-}$$ (E) $$ [Co(H_2O)_3F_3]$$ Choose the correct answer from the options given below :

The calculated spin-only magnetic moments of $$K_3[Fe(OH)_6]$$ and $$K_4[Fe(OH)_6]$$ respectively are :

Consider the following low-spin complexes $$K_3[Co(NO_2)_6],\; K_4[Fe(CN)_6],\; K_3[Fe(CN)_6],\; Cu_2[Fe(CN)_6] and Zn_2[Fe(CN)_6]$$ The sum of the spin-only magnetic moment values of
complexes having yellow colour is. _____ B.M. (answer in nearest integer)

Number of complexes from the following with even number of unpaired "d" electrons is: $$[V(H_2O)_6]^{3+},\ [Cr(H_2O)_6]^{2+},\ [Fe(H_2O)_6]^{3+},\ [Ni(H_2O)_6]^{3+},\ [Cu(H_2O)_6]^{2+}$$. [Given atomic numbers: V=23, Cr=24, Fe=26, Ni=28, Cu=29]

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

Match List - I with List - II.

Choose the correct answer from the options given below :

Which of the following complex is homoleptic?

Given below are two statements: Statement (I): A solution of $$[Ni(H_2O)_6]^{2+}$$ is green in colour. Statement (II): A solution of $$[Ni(CN)_4]^{2-}$$ is colourless. In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements:
Statement (I): Dimethyl glyoxime forms a six membered covalent chelate when treated with $$NiCl_2$$ solution in presence of $$NH_4OH$$.
Statement (II): Prussian blue precipitate contains iron both in +2 and +3 oxidation states.
In the light of the above statements, choose the most appropriate answer from the options given below:

$$[Co(NH_3)_6]^{3+}$$ and $$[CoF_6]^{3-}$$ are respectively known as: