Consider that the coordinating atoms of the ligands in - and - octahedral complexes are at the vertices of an octahedron. The sum of total number of the triangular faces in both the complexes having one N atom and two Cl atoms at their corners is ____.
Coordination Compounds — JEE Previous Year Questions
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The total number of all possible isomers for the square planar complex with formula is ____.
( = metal ion and gly = )
Number of paramagnetic complexes among the following is __________.
, , , , , , , , ,
Which of the following are true about the energy of the given d-orbitals of a tetrahedral complex?
A.
B.
C.
D.
Choose the correct answer from the given below:
- (A)A, B and D only
- (B)A and B only
- (C)B and D only
- (D)B, C and D only
An excess of is added to 100 mL of a 0.05 M solution of tetraaquadichloridochromium (III) chloride. The number of moles of AgCl precipitated will be __________ . (Nearest integer)
Match the LIST-I (Electronic configuration of tetrahedral metal ion) with LIST-II (Crystal Field Stabilization Energy (Δₜ))
Choose the correct answer from the options given below:
| List-I (Electronic configuration of tetrahedral metal ion) | List-II (Crystal Field Stabilization Energy (Δₜ)) |
|---|---|
| A.d² | I.−0.6 |
| B.d⁴ | II.−0.8 |
| C.d⁶ | III.−1.2 |
| D.d⁸ | IV.−0.4 |
- (A)A-III, B-IV, C-II, D-I
- (B)A-III, B-I, C-IV, D-II
- (C)A-III, B-IV, C-I, D-II
- (D)A-II, B-I, C-IV, D-III
Which of the following sequences of hybridisation, geometry and magnetic nature are correct for the given coordination compounds ?
A. − , tetrahedral, paramagnetic
B. − , octahedral, paramagnetic
C. − , tetrahedral, paramagnetic
D. − , square planar, diamagnetic
Choose the correct answer from the options given below :
- (A)A, B, C and D
- (B)B, C and D only
- (C)A, C and D only
- (D)A, B and D only
The correct statements about metal carbonyls are
A. The metal-carbon bonds in metal carbonyls possess both and -character.
B. Due to synergic bonding interactions between metal and CO ligand, the metal-carbon bond becomes weak.
C. The metal-carbon bond is formed by the donation of lone pair of electrons on the carbonyl carbon into a vacant orbital of metal.
D. The metal-carbon bond is formed by the donation of electrons from filled d-orbital of metal into vacant orbital of CO.
Choose the correct answer from the options given below:
- (A)A and B Only
- (B)A, C and D Only
- (C)B and C Only
- (D)A and D Only
Given below are two statements :
Statement I: Presence of large number of unpaired electrons in transition metal atoms results in higher enthalpies of their atomisation.
Statement II: and are the d-orbital splittings in [Fe(H₂O)₆]³⁺ and [Ni(Cl)₄]²⁻ complex ions respectively.
In the light of the above statements, choose the correct answer from the options given below :
- (A)Both Statement I and Statement II are correct
- (B)Both Statement I and Statement II are incorrect
- (C)Statement I is correct but Statement II is incorrect
- (D)Statement I is incorrect but Statement II is correct
Given below are two statements:
Statement I: Each electron in orbitals destabilizes the orbitals by and each electron in the orbitals stabilizes the orbitals by in an octahedral field on the basis of crystal field theory.
Statement II: All the d-orbitals of the transition metals have the same energy in their free atomic state but when a complex is formed the ligands destroy the degeneracy of these orbitals on the basis of crystal field theory.
In the light of the above statements, choose the correct answer from the options given below
- (A)Both Statement I and Statement II are correct
- (B)Both Statement I and Statement II are incorrect
- (C)Statement I is correct but Statement II is incorrect
- (D)Statement I is incorrect but Statement II is correct
The total number of unpaired electrons present in the d³, d⁴ (low spin), d⁵ (high spin), d⁶ (high spin) and d⁷ (low spin) octahedral complex systems is _______.
Identify the correct statements from the following
A. [Fe(C₂O₄)₃]³⁻ is the most stable complex among [Fe(OH)₆]³⁻, [Fe(C₂O₄)₃]³⁻ and [Fe(SCN)₆]³⁻
B. The stability of [Cu(NH₃)₄]²⁺ is greater than that of [Cu(en)₂]²⁺
C. The hybridization of Fe in K₄[Fe(CN)₆] is d²sp³
D. [Fe(NO₂)₃Cl₃]³⁻ exhibits linkage isomerism
E. NO₂⁻ and SCN⁻ ligands are NOT ambidentate ligands
Choose the correct answer from the options given below :
- (A)A, B, C, D and E
- (B)B, C and D only
- (C)A, C and D only
- (D)A, C and E only
Match List-I (Complex ion) with List-II (Calculated spin only magnetic moment (BM)).
Choose the correct answer from the options given below:
| List-I (Complex ion) | List-II (Calculated spin only magnetic moment (BM)) |
|---|---|
| A. | I. |
| B. | II. |
| C. | III. |
| D. | IV. |
- (A)A-I, B-III, C-IV, D-II
- (B)A-II, B-I, C-III, D-IV
- (C)A-IV, B-II, C-I, D-III
- (D)A-III, B-I, C-IV, D-II
Consider the metal complexes (A), (B) and (C). Choose the CORRECT option by considering the number of unpaired electrons present in (A), (B) and (C) respectively and the order of frequency of absorption.
- (A) and
- (B) and
- (C) and
- (D) and
5.33 g of , which is a 1 : 3 electrolyte, is dissolved in water and is passed through a cation exchanger. The chloride ions in the eluted solution, on treatment with results in 8.61 g of . The ratio of moles of complex reacted and moles of formed is ________ . (Nearest integer)
[Molar mass in g Cr : 52, Ag : 108, Cl : 35.5, H : 1, O : 16]
Which of the following complexes will show coordination isomerism?
A.
B.
C.
D.
E.
Choose the correct answer from the options given below:
- (A)B, C and D Only
- (B)B, D and E Only
- (C)A, C and D Only
- (D)C, D and E Only
Match List - I (Chromium (III) Complexes) with List - II ( / ). Choose the correct answer from the options given below :
| List - I (Chromium (III) Complexes, en = ethylene diamine) | List - II ($\Delta_{0}$ / $\mathrm{cm^{-1}}$) |
|---|---|
| A. | I.15,060 |
| B. | II.17,400 |
| C. | III.22,300 |
| D. | IV.26,600 |
- (A)A-I, B-II, C-III, D-IV
- (B)A-II, B-III, C-IV, D-I
- (C)A-III, B-IV, C-I, D-II
- (D)A-IV, B-I, C-II, D-III
The correct statement among the following is :
- (A)[Ni(CN)] and [NiCl] are diamagnetic and Ni(CO) is paramagnetic.
- (B)Ni(CO) and [NiCl] are diamagnetic and [Ni(CN)] is paramagnetic.
- (C)Ni(CO) and [Ni(CN)] are diamagnetic and [NiCl] is paramagnetic.
- (D)Ni(CO) is diamagnetic and [NiCl] and [Ni(CN)] are paramagnetic.
X is the number of geometrical isomers exhibited by [Pt(NH)(HO)BrCl].
Y is the number of optically inactive isomer(s) exhibited by [CrCl(ox)]
Z is the number of geometrical isomers exhibited by [Co(NH)(NO)]
The value of X + Y + Z is _________ .
The correct increasing order of spin-only magnetic moment values of the complex ions (A), (B), (C) and (D) is:
- (A)A = B < C < D
- (B)A = B < D < C
- (C)C = D < B < A
- (D)C < B < D < A
The number of isoelectronic species among , , , and is 'n'. If 'n' moles of AgCl is formed during the reaction of complex with formula with excess of solution, then the number of electrons present in the orbital of the complex is ________.
A chromium complex with a formula 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 . The amount of AgCl formed in the above process is _______ g. (Nearest integer)
[Given : Molar mass in Cr : 52; Cl : 35.5, Ag : 108, O : 16, H : 1]
Consider a mixture 'X' which is made by dissolving 0.4 mol of Br and 0.4 mol of in water to make 4 L of solution. When 2 L of mixture 'X' is allowed to react with excess of , it forms precipitate 'Y'. The rest 2 L of mixture 'X' reacts with excess to form precipitate 'Z'. Which of the following statements is CORRECT.
- (A)0.2 mol of 'Z' is formed
- (B)'Y' is and 'Z' is AgBr
- (C)0.4 mol of 'Z' is formed
- (D)0.1 mol of 'Y' is formed
Given below are two statements
Statements-I : The number of paramagnetic species among , , and is 3.
Statement-II : is the correct order in terms of number of unpaired electron(s) in the complexes.
In the light of the above statements, choose the correct answer from the options given below.
- (A)Both statement-I and statement-II are true
- (B)Both statement-I and statement-II are false
- (C)Statement-I is true but statement-II is false
- (D)Statement-I is false but statement-II is true
The wavelength of light absorbed for the following complexes are in the order.
(I) ; (II) ; (III) ;
(IV) ; (V)
- (A)III < I < II < IV < V
- (B)III < I < IV < V < II
- (C)III < IV < I < II < V
- (D)III < I < IV < II < V
Given below are two statements :
Statement-I Hybridisation, shape and spin only magnetic moment of is , octahedral and 4.9 BM respectively.
Statement-II Geometry, hybridisation and spin only magnetic moment values (BM) of the ions , and respectively are square planar, tetrahedral, octahedral : , , and 0, 5.9, 4.9.
In the light of the above statements, choose the correct answer from the options given below
- (A)Both statement-I and statement-II are false
- (B)Statement I is false but statement-II is true
- (C)Both statement-I and statement-II are true
- (D)Statement-I is true but statement-II is false
Total number of unpaired electrons present in the central metal atoms/ions of
[Ni(CO)], [NiCl] , [PtCl(NH)], [Ni(CN)] and [Pt (CN)] is____.
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 :
- (A)C and E only
- (B)A, D and B only
- (C)B, C and E only
- (D)C and D only
Given below are two statements :
Statement I : [CoBr] ion will absorb light of lower energy than [CoCl] ion.
Statement II : In [CoI] ion, the energy separation between the two set of d-orbitals is more than [CoCl] ion.
In the light of the above statements, choose the correct answer from the options given below :
- (A)Both Statement I and Statement II are false
- (B)Statement I is true but Statement II is false
- (C)Statement I is false but Statement II is true
- (D)Both Statement I and Statement II are true
The crystal field splitting energy of [Co(oxalate)] complex is 'n' times that of the [Cr(oxalate)] complex. Here 'n' is ______. [Assume >> P]
Identify the CORRECT set of details from the following :
A. [Co(NH)] : Inner orbital complex ; dsp hybridized
B. [MnCl] Outer orbital complex; spd hybridized
C. [CoF] : Outer orbital complex ; dsp hybridized
D. [FeF] : Outer orbital complex: spd hybridized
E. [Ni(CN)] : Inner orbital complex ; sp hybridized
Choose the correct answer from the options given below:
- (A)C & D only
- (B)A, B & D only
- (C)A, C & E only
- (D)A, B, C, D & E
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 .
E. The geometrical arrangement of ligands in this complex is similar to that in .
Choose the correct answer from the options given below :
- (A)A and B only
- (B)A, B and D only
- (C)C and D only
- (D)C, D and E only
A first row transition metla (M) does not liberate H gas from dilute HCl. 1 mol of aqueous solution of MSO is treated with excess of aqueous KCN and then HS(g) is passed through the solution. The amount of MS (metal sulphide) formed from the above reaction is _______ mol.
- (A)2
- (B)1
- (C)3
- (D)0
Consider the transition metal ions Mn, Cr, Fe and Co and all form low spin octahedral complexes. The correct decreasing order of unpaired electrons in their respective d-orbitals of the complexes is
- (A)Cr > Fe > Co > Mn
- (B)Mn > Fe > Co > Cr
- (C)Fe > Co > Mn > Cr
- (D)Cr > Mn > Fe > Co
Given below are two statements:
Statement I: Crystal Field Stabilization Energy (CFSE) of is greater than that of .
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:
- (A)Both Statement I and Statement II are true
- (B)Both Statement I and Statement II are false
- (C)Statement I is true but Statement II is false
- (D)Statement I is false but Statement II is true
Identify the metal ions among , , , and 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 ________.
The sum of the spin only magnetic moment values (in B.M.) of and is ________.
The correct order of the wavelength maxima of the absorption band in the ultraviolet -visible region for the given complexes is
- (A)
- (B)
- (C)
- (D)
Given below are two statements:
Statement I: A homoleptic octahedral complex, formed using monodentate ligands, will not show stereoisomerism.
Statement II: cis- and trans- platin are heteroleptic complexes of Pd.
In the light of the above statements, choose the correct answer from the options given below:
- (A)Both statement I and Statement II are true.
- (B)Statement I is false but Statement II is true.
- (C)Both statement I and Statement II are false.
- (D)Statement I is true but Statement II is false.
The number of species from the following that are involved in hybridization: , , , , and are:
- (A)
- (B)
- (C)
- (D)
Match the LIST-I (Complex/Species) with LIST-II (Shape & magnetic moment). Choose the correct answer from the options given below:
| LIST-I (Complex/Species) | LIST-II (Shape & magnetic moment) |
|---|---|
| A. | I.Tetrahedral, 2.8 BM |
| B. | II.Square planar, 0 BM |
| C. | III.Tetrahedral, 0 BM |
| D. | IV.Tetrahedral, 5.9 BM |
- (A)A-III, B-IV, C-II, D-I
- (B)A-I, B-II, C-III, D-IV
- (C)A-III, B-II, C-I, D-IV
- (D)A-IV, B-I, C-III, D-II
'X' is the number of acidic oxides among , , , and . The primary valency of cobalt in is Y. The value of X + Y is:
- (A)5
- (B)4
- (C)2
- (D)3
An octahedral complex having molecular composition Co.5NH.Cl.SO has two isomers A and B. The solution of A gives a white precipitate with AgNO solution and the solution of B gives white precipitate with BaCl solution. The type of isomerism exhibited by the complex is.
- (A)Co-ordinate isomerism
- (B)Linkage isomerism
- (C)Ionisation isomerism
- (D)Geometrical isomerism
Match the LIST-I (Complex) with LIST-II (Primary and secondary valency). Choose the correct answer from the options given below:
| LIST-I (Complex) | LIST-II (Primary and secondary valency) |
|---|---|
| A. | I.3, 6 |
| B. | II.3, 4 |
| C. | III.2, 6 |
| D. | IV.2, 4 |
- (A)(A)-(III), (B)-(I), (C)-(II), (D)-(IV)
- (B)(A)-(I), (B)-(IV), (C)-(II), (D)-(III)
- (C)(A)-(I), (B)-(III), (C)-(II), (D)-(IV)
- (D)(A)-(II), (B)-(III), (C)-(IV), (D)-(I)
The number of paramagnetic metal complex species among , , , , , and with same number of unpaired electrons is __________.
The number of paramagnetic complex among , , , , and , which involved hybridization is ______.
The number of unpaired electrons responsible for the paramagnetic nature of the following complex species are respectively: , , ,
- (A)1, 5, 4, 2
- (B)1, 5, 5, 2
- (C)1, 1, 4, 2
- (D)1, 4, 4, 2
Which one of the following complexes will have and B.M.?
- (A)
- (B)
- (C)
- (D)
A metal complex with a formula is involved in hybridisation. It upon reaction with excess of solution gives "x" moles of AgCl. Consider "x" is equal to the number of lone pairs of electron present in central atom of . Then the number of geometrical isomers exhibited by the complex is ______.
Number of stereoisomers possible for the complexes, and are respectively (py = pyridine, ox = oxalate)
- (A)3 & 3
- (B)2 & 2
- (C)2 & 3
- (D)1 & 2
The correct order of , , and complex species based on the number of unpaired electrons present is:
- (A)
- (B)
- (C)
- (D)
Identify the diamagnetic octahedral complex ions from below:
A.
B.
C.
D.
Choose the correct answer from the options given below:
- (A)B and D Only
- (B)A and D Only
- (C)A and C Only
- (D)B and C Only
The correct order of the complexes (A), (B), (C) and (D) in terms of wavelength of light absorbed is:
- (A)D > A > B > C
- (B)C > B > D > A
- (C)D > C > B > A
- (D)C > B > A > D
The number of optical isomers exhibited by the iron complex (A) obtained from the following reaction is __________.
Given below are two statements: Statement (I): In octahedral complexes, when high spin complexes are formed. When low spin complexes are formed. Statement (II): In tetrahedral complexes, because of , low spin complexes are rarely formed. In the light of the above statements, choose the most appropriate answer from the options given below:
- (A)Statement I is correct but Statement II is incorrect
- (B)Both Statement I and Statement II are incorrect
- (C)Statement I is incorrect but Statement II is correct
- (D)Both Statement I and Statement II are correct
The d-orbital electronic configuration of the complex among , , and that has the highest CFSE value is:
- (A)
- (B)
- (C)
- (D)
A transition metal (M) among Mn, Cr, Co and Fe has the highest standard electrode potential . It forms a metal complex of the type . The number of electrons present in the orbital of the complex is ______.
The type of hybridization and the magnetic property of are:
- (A), paramagnetic with four unpaired electrons
- (B), paramagnetic with four unpaired electrons
- (C), paramagnetic with two unpaired electrons
- (D), paramagnetic with two unpaired electrons
Match List-I (Complex) with List-II (Hybridisation & Magnetic characters). Choose the correct answer from the options given below:
| List-I (Complex) | List-II (Hybridisation & Magnetic characters) |
|---|---|
| A.[MnBr] | I.dsp & diamagnetic |
| B.[FeF] | II.spd & paramagnetic |
| C.[Co(CO)] | III.sp & diamagnetic |
| D.[Ni(CO)] | IV.sp & paramagnetic |
- (A)(A)-(III), (B)-(II), (C)-(I), (D)-(IV)
- (B)(A)-(III), (B)-(I), (C)-(II), (D)-(IV)
- (C)(A)-(IV), (B)-(I), (C)-(II), (D)-(III)
- (D)(A)-(IV), (B)-(II), (C)-(I), (D)-(III)
Identify the homoleptic complexes with odd number of d electrons in the central metal. (A) (B) (C) (D) (E) . Choose the correct answer from the options given below:
- (A)(B) and (D) only
- (B)(C) and (E) only
- (C)(A), (B) and (D) only
- (D)(A), (C) and (E) only
The correct increasing order of stability of the complexes based on value is: (I) [Mn(CN)] (II) [Co(CN)] (III) [Fe(CN)] (IV) [Fe(CN)].
- (A)II < III < I < IV
- (B)IV < III < II < I
- (C)I < II < IV < III
- (D)III < II < IV < I
Consider the following low-spin complexes , , , and . The sum of the spin-only magnetic moment values of complexes having yellow colour is ______ B.M. (answer is nearest integer)
The calculated spin-only magnetic moments of and respectively are:
- (A)4.90 and 4.90 B.M.
- (B)5.92 and 4.90 B.M.
- (C)3.87 and 4.90 B.M.
- (D)4.90 and 5.92 B.M.
Match List-I (Complex) with List-II (Hybridisation of central metal ion). Choose the correct answer from the options given below:
| List-I (Complex) | List-II (Hybridisation of central metal ion) |
|---|---|
| A.[CoF] | I.dsp |
| B.[NiCl] | II.sp |
| C.[Co(NH)] | III.spd |
| D.[Ni(CN)] | IV.dsp |
- (A)(A)-(I), (B)-(IV), (C)-(III), (D)-(II)
- (B)(A)-(III), (B)-(II), (C)-(I), (D)-(IV)
- (C)(A)-(I), (B)-(II), (C)-(III), (D)-(IV)
- (D)(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
The conditions and consequence that favours the configuration in a metal complex are :
- (A)weak field ligand, high spin complex
- (B)strong field ligand, high spin complex
- (C)strong field ligand, low spin complex
- (D)weak field ligand, low spin complex
When Ethane-1,2-diamine is added progressively to an aqueous solution of Nickel (II) chloride, the sequence of colour change observed will be :
- (A)Pale Blue Blue Green Violet
- (B)Pale Blue Violet Violet Green
- (C)Green Pale Blue Violet
- (D)Violet Blue Pale Blue Green
One mole of the octahedral complex compound Co(NH₃)₅Cl₃ gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with excess of AgNO₃ solution to yield two moles of AgCl(s). The structure of the complex is :
- (A)[Co(NH₃)₅Cl]Cl₂
- (B)[Co(NH₃)₄Cl]Cl₂·NH₃
- (C)[Co(NH₃)₄Cl₂]Cl·NH₃
- (D)[Co(NH₃)₅Cl₃]·2NH₃
The complex that shows Facial – Meridional isomerism is
- (A)[Co(NH₃)₃Cl₃]
- (B)[Co(NH₃)₄Cl₂]⁺
- (C)[Co(en)₃]³⁺
- (D)[Co(en)₂Cl₂]⁺
Identify the coordination complexes in which the central metal ion has configuration. (A) (B) (C) (D) (E) . Choose the correct answer from the options given below:
- (A)(C) and (E) only
- (B)(B), (C) and (D) only
- (C)(B) and (D) only
- (D)(A), (B) and (E) only
The d-electronic configuration of an octahedral Co(II) complex having magnetic moment of 3.95 BM is :
- (A)
- (B)
- (C)
- (D)
CrCl₃·xNH₃ can exist as a complex. 0.1 molal aqueous solution of this complex shows a depression in freezing point of 0.558°C. Assuming 100% ionisation of this complex and coordination number of Cr is 6, the complex will be (Given K kg mol)
- (A)[Cr(NH₃)₆]Cl₃
- (B)[Cr(NH₃)₄Cl₂]Cl
- (C)[Cr(NH₃)₅Cl]Cl₂
- (D)[Cr(NH₃)₃Cl₃]
From the magnetic behaviour of [NiCl₄]²⁻ (paramagnetic) and [Ni(CO)₄] (diamagnetic), choose the correct geometry and oxidation state:
- (A)[NiCl₄]²⁻: Ni⁰, square planar; [Ni(CO)₄]: Ni(0), square planar
- (B)[NiCl₄]²⁻: Ni⁰, tetrahedral; [Ni(CO)₄]: Ni(0), tetrahedral
- (C)[NiCl₄]²⁻: Ni²⁺, tetrahedral; [Ni(CO)₄]: Ni⁰, square planar
- (D)[NiCl₄]²⁻: Ni²⁺, tetrahedral; [Ni(CO)₄]: Ni(0), tetrahedral
The correct order of the following complexes in terms of their crystal field stabilization energies is:
- (A)
- (B)
- (C)
- (D)
Identify the homoleptic complex(es) that is/are low spin. (A) (B) (C) (D) (E) . Choose the correct answer from the options given below:
- (A)(B) and (E) only
- (B)(A) and (C) only
- (C)(C) and (D) only
- (D)(C) only
In which of the following complexes will the crystal-field stabilisation energy (CFSE, Δ₀) be equal to zero?
- (A)[Fe(NH₃)₆]Br₃
- (B)[Fe(en)₃]Cl₃
- (C)K₂[Fe(CN)₄]
- (D)K₃[Fe(SCN)₆]
The complex of ion and dimethyl glyoxime contains ______ number of Hydrogen (H) atoms.
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 results in a sparingly soluble complex Q.
The number of moles of potassium iodide required to produce two moles of P is ______.
Among , , , , , , and the total number of species with tetrahedral geometry is ______.
Among V(CO), Cr(CO), Mn(CO), Fe(CO), [Co(CO)], [Cr(CO)] and Ir(CO), the total number of species isoelectronic with Ni(CO) is ________________.
[Given, atomic number: V = 23, Cr = 24, Mn = 25, Fe = 26, Co = 27, Ni = 28, Cu = 29, Ir = 77]
Among the following complexes, the total number of diamagnetic species is ________.
[Mn(NH)], [MnCl], [FeF], [CoF], [Fe(NH)] and [Co(en)]
[Given, atomic number: Mn = 25, Fe = 26, Co = 27; en = HNCHCHNH]
Among the following options, select the option in which each complex in shows geometrical isomerism and the two complexes in are ionization isomers of each other.
[en = HNCHCHNH]
- (A): [Ni(CO)] and [PdCl(PPh)] : [Co(NH)Cl]SO and [Co(NH)(SO)]Cl
- (B): [Co(en)(NH)Cl] and [PdCl(PPh)] : [Co(NH)][Cr(CN)] and [Cr(NH)[Co(CN)]
- (C): [Co(NH)(NO)] and [Co(en)Cl] : [Co(NH)Cl]SO and [Co(NH)(SO)]Cl
- (D): [Cr(NH)Cl]Cl and [Co(en)(NH)Cl] : [Cr(HO)]Cl and [Cr(HO)Cl]Cl.HO
Number of ambidentate ligands among the following is _____.
.
Match List-I (Complex) with List-II (Hybridisation). Choose the correct answer from the options given below:
| List-I (Complex) | List-II (Hybridisation) |
|---|---|
| A. | I. |
| B. | II. |
| C. | III. |
| D. | IV. |
- (A)A-III, B-I, C-II, D-IV
- (B)A-III, B-II, C-IV, D-I
- (C)A-I, B-III, C-II, D-IV
- (D)A-III, B-I, C-IV, D-II
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : The total number of geometrical isomers shown by complex ion is three.
Reason (R) : complex ion has an octahedral geometry.
In the light of the above statements, choose the most appropriate answer from the options given below :
- (A)Both (A) and (R) are correct and (R) is the correct explanation of (A).
- (B)(A) is correct but (R) is not correct.
- (C)(A) is not correct but (R) is correct.
- (D)Both (A) and (R) are correct but (R) is not the correct explanation of (A).
The coordination environment of ion in its complex with is:
- (A)tetrahedral
- (B)octahedral
- (C)square planar
- (D)trigonal prismatic
Match List-I (Complex ion) with List-II (Spin only magnetic moment in B.M.). Choose the correct answer from the options given below:
| List-I (Complex ion) | List-II (Spin only magnetic moment in B.M.) |
|---|---|
| A. | I.4.90 |
| B. | II.3.87 |
| C. | III.0.0 |
| D. | IV.2.83 |
- (A)(A)-(I), (B)-(IV), (C)-(II), (D)-(III)
- (B)(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
- (C)(A)-(II), (B)-(IV), (C)-(I), (D)-(III)
- (D)(A)-(II), (B)-(III), (C)-(I), (D)-(IV)
Given below are two statements:
Statement I: and can act as ligands to form transition metal complexes.
Statement II: As N and P are from same group, the nature of bonding of and is always same with transition metals.
In the light of the above statements, choose the most appropriate answer from the options given below:
- (A)Statement I is incorrect but Statement II is correct
- (B)Both Statement I and Statement II are correct
- (C)Statement I is correct but Statement II is incorrect
- (D)Both Statement I and Statement II are incorrect
An octahedral complex with the formula upon reaction with excess of solution gives moles of . Consider the oxidation state of Co in the complex is . The value of is:
- (A)3
- (B)6
- (C)8
- (D)5
Match List-I (iron compounds) with List-II (their colours). Choose the correct answer from the options given below:
| List-I (Compound) | List-II (Colour) |
|---|---|
| A. | I.Violet |
| B. | II.Blood Red |
| C. | III.Prussian Blue |
| D. | IV.Yellow |
- (A)A-III, B-I, C-II, D-IV
- (B)A-IV, B-I, C-III, D-II
- (C)A-II, B-III, C-I, D-IV
- (D)A-I, B-II, C-III, D-IV
Number of complexes with even number of electrons in orbitals is: , , , ,
- (A)
- (B)
- (C)
- (D)
Total number of unpaired electrons in the complex ions and is _______ .
Consider the following complexes: (A) , (B) , (C) , (D) . The correct order of A, B, C and D in terms of wavenumber of light absorbed is:
- (A)C < D < A < B
- (B)D < A < C < B
- (C)A < C < B < D
- (D)B < C < A < D
Match List-I (tetrahedral complexes) with List-II (their d-electron configurations). Choose the correct answer:
| List-I (Tetrahedral Complex) | List-II (Electronic configuration) |
|---|---|
| A. | I. |
| B. | II. |
| C. | III. |
| D. | IV. |
- (A)(A)-(I), (B)-(III), (C)-(IV), (D)-(II)
- (B)(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
- (C)(A)-(III), (B)-(IV), (C)-(II), (D)-(I)
- (D)(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
Consider the following reactions: and . The number of protons that do not involve in hydrogen bonding in the product B is _______.
The correct IUPAC name of is:
- (A)bis(trimethylphosphine)dibromoplatinum(II)
- (B)bis[bromo(trimethylphosphine)]platinum(II)
- (C)dibromobis(trimethylphosphine)platinum(II)
- (D)dibromodi(trimethylphosphine)platinum(II)
The number of complexes from the following with no electrons in the orbital is: , , , , .
- (A)3
- (B)1
- (C)4
- (D)2
Which one of the following complexes will exhibit the least paramagnetic behaviour? [Atomic numbers: Cr = 24, Mn = 25, Fe = 26, Co = 27]
- (A)
- (B)
- (C)
- (D)
The metal atom present in the complex MABXL (where A, B, X and L are unidentate ligands and M is the metal) involves hybridization. The number of geometrical isomers exhibited by the complex is:
- (A)4
- (B)0
- (C)2
- (D)3
The correct order of ligands arranged in increasing field strength is:
- (A)
- (B)
- (C)
- (D)
If an iron (III) complex with the formula has no electron in its orbital, then the value of is
- (A)5
- (B)6
- (C)3
- (D)4
The correct sequence of ligands in the order of decreasing field strength is:
- (A)
- (B)
- (C)
- (D)
Number of complexes from the following with even number of unpaired "d" electrons is ___. , , , , . [Given atomic numbers: V, Cr, Fe, Ni, Cu]
- (A)
- (B)
- (C)
- (D)
The number of unpaired d-electrons in is
- (A)4
- (B)2
- (C)0
- (D)1
and are respectively known as:
- (A)Spin free Complex, Spin paired Complex
- (B)Spin paired Complex, Spin free Complex
- (C)Outer orbital Complex, Inner orbital Complex
- (D)Inner orbital Complex, Spin paired Complex
Given below are two statements: Statement (I): Dimethyl glyoxime forms a six-membered covalent chelate when treated with solution in presence of . 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:
- (A)Statement I is false but Statement II is true
- (B)Both Statement I and Statement II are true
- (C)Both Statement I and Statement II are false
- (D)Statement I is true but Statement II is false
Which of the following complex is homoleptic?
- (A)
- (B)
- (C)
- (D)
Given below are two statements: Statement (I): A solution of is green in colour. Statement (II): A solution of is colourless. In the light of the above statements, choose the most appropriate answer from the options given below:
- (A)Both Statement I and Statement II are incorrect
- (B)Both Statement I and Statement II are correct
- (C)Statement I is incorrect but Statement II is correct
- (D)Statement I is correct but Statement II is incorrect
The 'Spin only' Magnetic moment for is ______ BM. (given : Atomic number of Ni : 28)
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 complex is . D. The number of possible isomer(s) of cis- is one. Choose the correct answer from the options given below:
- (A)A, D only
- (B)A, C only
- (C)B, D only
- (D)B, C only
Select the option with correct property -
- (A) and both diamagnetic
- (B) and both paramagnetic
- (C) diamagnetic, paramagnetic
- (D) diamagnetic, paramagnetic
Match List I with List II. Choose the correct answer from the options given below:
| List-I (Complex ion) | List-II (Electronic Configuration) |
|---|---|
| A. | I. |
| B. | II. |
| C. | III. |
| D. | IV. |
- (A)A-III, B-II, C-IV, D-I
- (B)A-IV, B-I, C-II, D-III
- (C)A-IV, B-III, C-II, D-I
- (D)A-II, B-III, C-IV, D-I
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 act as a ligand in Wilkinson catalyst. (E) The stability constants of and are similar with EDTA complexes. Choose the correct answer from the options given below:
- (A)(B), (C), (E) only
- (B)(C), (D), (E) only
- (C)(A), (B), (C) only
- (D)(A), (B), (E) only
Number of complexes which show optical isomerism among the following is ______.
cis-, , cis-, cis-, trans-, trans-
The coordination geometry around the manganese in decacarbonyldimanganese(0) is:
- (A)Octahedral
- (B)Trigonal bipyramidal
- (C)Square pyramidal
- (D)Square planar
Aluminium chloride in acidified aqueous solution forms an ion having geometry:
- (A)Octahedral
- (B)Square Planar
- (C)Tetrahedral
- (D)Trigonal bipyramidal
Match List I with List II. Choose the correct answer from the options given below:
| List-I (Substances) | List-II (Element Present) |
|---|---|
| A.Ziegler catalyst | I.Rhodium |
| B.Blood Pigment | II.Cobalt |
| C.Wilkinson catalyst | III.Iron |
| D.Vitamin | IV.Titanium |
- (A)A-II, B-IV, C-I, D-III
- (B)A-II, B-III, C-IV, D-I
- (C)A-III, B-III, C-IV, D-II
- (D)A-IV, B-III, C-I, D-II
In which one of the following metal carbonyls, CO forms a bridge between metal atoms?
- (A)
- (B)
- (C)
- (D)
A reagent which gives brilliant red precipitate with Nickel ions in basic medium is:
- (A)sodium nitroprusside
- (B)neutral FeCl3
- (C)meta-dinitrobenzene
- (D)dimethyl glyoxime
The spin only magnetic moment value of square planar complex is __________ B.M. (Nearest integer) (Given atomic number for Pt = 78).
Identify from the following species in which hybridization is shown by central atom :
- (A)
- (B)
- (C)
- (D)
The complex(es), which can exhibit the type of isomerism shown by , is(are)
- (A)
- (B)
- (C)
- (D)
Match the electronic configurations in List-I with appropriate metal complex ions in List-II and choose the correct option.
[Atomic Number: Fe = 26, Mn = 25, Co = 27]
| List-I | List-II |
|---|---|
| P. | 1. |
| Q. | 2. |
| R. | 3. |
| S. | 4. |
| 5. |
- (A)P 1; Q 4; R 2; S 3
- (B)P 1; Q 2; R 4; S 5
- (C)P 3; Q 2; R 5; S 1
- (D)P 3; Q 2; R 4; S 1
The volume (in mL) of 0.1 M required for complete precipitation of chloride ions present in 20 mL of 0.01 M solution of as silver chloride is _______
The homoleptic and octahedral complex of and has _______ unpaired electron(s) in the set of orbitals.
The complex with highest magnitude of crystal field splitting energy is
- (A)
- (B)
- (C)
- (D)
Which of the following complexes will exhibit maximum attraction to an applied magnetic field?
- (A)
- (B)
- (C)
- (D)
The mismatched combinations are:
A. Chlorophyll - Co
B. Water hardness - EDTA
C. Photography -
D. Wilkinson catalyst -
E. Chelating ligand - D-Penicillamine
Choose the correct answer from the options given below:
- (A)A and C Only
- (B)A and E Only
- (C)D and E Only
- (D)A, C and E Only
The total number of stereoisomers for the complex (where ox = oxalate) is:
- (A)2
- (B)3
- (C)1
- (D)4
Match List I (complex) with List II (CFSE in units of ). Choose the correct answer from the options given below:
| List I (Complex) | List II (CFSE/$\Delta_0$) |
|---|---|
| A. | I. |
| B. | II. |
| C. | III. |
| D. | IV. |
- (A)A-I, B-IV, C-II, D-III
- (B)A-II, B-III, C-IV, D-I
- (C)A-I, B-II, C-IV, D-III
- (D)A-IV, B-I, C-II, D-III
The complex that dissolves in water is
- (A)
- (B)
- (C)
- (D)
The set which does not have ambidentate ligand(s) is
- (A), ethylene diammine,
- (B), ,
- (C), ,
- (D), ,
The magnetic moment is measured in Bohr Magneton (BM). The spin-only magnetic moment of Fe in and complexes respectively is:
- (A)6.92 B.M. in both
- (B)4.89 B.M. and 6.92 B.M.
- (C)3.87 B.M. and 1.732 B.M.
- (D)5.92 B.M. and 1.732 B.M.
Match List-I (Compound) with List-II (Colour). Choose the correct answer from the options given below:
| List-I (Compound) | List-II (Colour) |
|---|---|
| A. | I.Brown |
| B. | II.White |
| C. | III.Yellow |
| D. | IV.Blue |
- (A)A-II, B-III, C-I, D-IV
- (B)A-III, B-IV, C-II, D-I
- (C)A-II, B-IV, C-I, D-III
- (D)A-II, B-III, C-IV, D-I
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: absorbs at lower wavelength of light with respect to .
Reason R: It is because the wavelength of the light absorbed depends on the oxidation state of the metal ion.
In the light of the above statements, choose the correct answer from the options given below:
- (A)A is false but R is true
- (B)A is true but R is false
- (C)Both A and R are true and R is the correct explanation of A
- (D)Both A and R are true and R is NOT the correct explanation of A
The ratio of spin-only magnetic moment values is __________.
Which of the following complex has a possibility to exist as meridional isomer?
- (A)
- (B)
- (C)
- (D)
If is replaced by in the complex , which of the following properties are expected to get changed? A. Geometry B. Geometrical isomerism C. Optical isomerism D. Magnetic properties.
- (A)A, B and C
- (B)A, B and D
- (C)A and D
- (D)B and C
The correct order of the number of unpaired electrons in the given complexes is: A. B. C. D. E. . Choose the correct answer from the options given below:
- (A)A < E < D < C < B
- (B)E < A < D < C < B
- (C)E < A < B < D < C
- (D)A < E < C < B < D
The octahedral diamagnetic low spin complex among the following is
- (A)[NiCl]
- (B)[CoCl]
- (C)[CoF]
- (D)[Co(NH)]
For a metal ion, the calculated magnetic moment is BM. This metal ion has _______ number of unpaired electrons.
Match List I (hexa-aqua complex ion) with List II (its crystal field stabilization value). Choose the correct answer from the options given below:
| List I | List II |
|---|---|
| A. | I. |
| B. | II. |
| C. | III. |
| D. | IV. |
- (A)A-II, B-IV, C-I, D-III
- (B)A-IV, B-I, C-II, D-III
- (C)A-IV, B-I, C-III, D-II
- (D)A-III, B-IV, C-II, D-I
In potassium ferrocyanide, there are _________ pairs of electrons in the t set of orbitals.
Match List-I (coordination complex) with List-II (number of unpaired electrons). Choose the correct answer from the options given below:
| List-I (Coordination complex) | List-II (Number of unpaired electrons) |
|---|---|
| A. | I.0 |
| B. | II.3 |
| C. | III.2 |
| D. | IV.4 |
- (A)A-II, B-IV, C-I, D-III
- (B)A-IV, B-III, C-II, D-I
- (C)A-III, B-IV, C-I, D-II
- (D)A-II, B-I, C-IV, D-III
The correct order of spin only magnetic moments for the following complex ions is
- (A)
- (B)
- (C)
- (D)
Which of the following complex is octahedral, diamagnetic and the most stable?
- (A)
- (B)
- (C)
- (D)
The observed magnetic moment of the complex is 6.06 BM. The numerical value of x is ____.
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 is , whereas for is .
Reason R: In both complexes, Fe is present in oxidation state.
In the light of the above statements, choose the correct answer from the options given below:
- (A)Both A and R are true but R is NOT the correct explanation of A
- (B)A is false but R is true
- (C)A is true but R is false
- (D)Both A and R are true and R is the correct explanation of A
For a concentrated solution of ambidentate ligands in a representative metal complex is _____. (en = ethylenediamine)
The IUPAC name of is:
- (A)Potassium trioxalatocobaltate(III)
- (B)Potassium trisoxalato cobalt(III)
- (C)Potassium trisoxalato cobaltate(III)
- (D)Potassium trioxalatocobalt(III)
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: In the complex and , the metals have zero oxidation state.
Reason R: Low oxidation states are found when a complex has ligands capable of -donor character in addition to the -bonding.
In the light of the above statements, choose the most appropriate answer from the option given below.
- (A)A is correct but R is not correct
- (B)A is not correct but R is correct
- (C)Both A and R are correct but R is NOT the correct explanation of A
- (D)Both A and R are correct and R is the correct explanation of A
A solution of when treated with gives a prussian blue precipitate due to the formation of:
- (A)
- (B)
- (C)
- (D)
The spin only magnetic moment of complexes is _________ B.M. (Nearest integer) (Given: Atomic no. of Mn is 25)
Which of the following complex will show largest splitting of d-orbitals?
- (A)
- (B)
- (C)
- (D)
Which of the following are the examples of double salt? (A) (B) (C) (D) . Choose the correct answer:
- (A)B and D only
- (B)A and C only
- (C)A and B only
- (D)A, B and D only
The complex cation which has two isomers is:
- (A)
- (B)
- (C)
- (D)
If the CFSE of is kJ/mol, this complex will absorb maximum at wavelength _________ nm. (nearest integer) Assume Planck's constant (h) Js, Speed of light (c) m/s and Avogadro's Constant /mol
Cobalt chloride when dissolved in water forms pink colored complex X which has octahedral geometry. This solution on treating with conc HCl forms deep blue complex, Y which has a Z geometry. X, Y and Z, respectively, are
- (A)X = [Co(H2O)6]2+, Y = [CoCl4]2−, Z = Tetrahedral
- (B)X = [Co(H2O)6]2+, Y = [CoCl6]3−, Z = Octahedral
- (C)X = [Co(H2O)4Cl2]+, Y = [CoCl4]2−, Z = Tetrahedral
- (D)X = [Co(H2O)6]3+, Y = [CoCl6]3−, Z = Octahedral
The logarithm of equilibrium constant for the reaction is ___ (Nearest integer). Given : ; ;
1 L, 0.02 M solution of is mixed with 1 L, 0.02 M solution of . The resulting solution is divided into two equal parts (X). One part is treated with excess of solution to give Y, and the other with excess of solution to give Z. The number of moles of Y and Z respectively are:
- (A)0.02, 0.01
- (B)0.01, 0.01
- (C)0.01, 0.02
- (D)0.02, 0.02
To inhibit the growth of tumours, identify the compounds used from the following: A. EDTA B. Coordination Compounds of Pt C. D-Penicillamine D. Cis-Platin. Choose the correct answer from the option given below:
- (A)B and D Only
- (B)C and D Only
- (C)A and C Only
- (D)A and B Only
Match List-I (Complexes) with List-II (Hybridisation). Choose the correct answer from the options given below:
| List-I (Complexes) | List-II (Hybridisation) |
|---|---|
| A. | I. |
| B. | II. |
| C. | III. |
| D. | IV. |
- (A)A-I, B-II, C-IV, D-III
- (B)A-II, B-I, C-III, D-IV
- (C)A-II, B-I, C-IV, D-III
- (D)A-I, B-II, C-III, D-IV
Which of the following is correct order of ligand field strength?
- (A)CO < en < NH < CO < S
- (B)en < CO < S < CO
- (C)S < CO < NH < en < CO
- (D)S < NH < en < CO < CO
The ClCoCl bond angle value(s) in a fac- complex is/are:
- (A)
- (B)
- (C)
- (D)
Chiral complex from the following is: (Here en = ethylene diamine)
- (A)cis-[PtCl(en)]
- (B)trans-[PtCl(en)]
- (C)cis-[PtCl(NH)]
- (D)trans-[Co(NH)Cl]
The denticity of the ligand present in the Fehling's reagent is _____.
Correct order of spin only magnetic moment of the following complex ions is: (Given At.no. Fe: 26, Co:27)
- (A)
- (B)
- (C)
- (D)
The sum of bridging carbonyls in W(CO) and Mn(CO) is ________ .
Match List I (Coordination entity) with List II (Wavelength of light absorbed in nm) and choose the correct answer from the options given below.
| LIST I (Coordination entity) | LIST II (Wavelength of light absorbed in nm) |
|---|---|
| A. | I.310 |
| B. | II.475 |
| C. | III.535 |
| D. | IV.600 |
- (A)A-III, B-I, C-II, D-IV
- (B)A-IV, B-I, C-III, D-II
- (C)A-III, B-II, C-I, D-IV
- (D)A-II, B-III, C-IV, D-I
The number of paramagnetic species from the following is _______: , , , , , and .
Total number of moles of AgCl precipitated on addition of excess of to one mole each of the following complexes , , and is
The primary and secondary valencies of cobalt respectively in are:
- (A)3 and 6
- (B)2 and 6
- (C)3 and 5
- (D)2 and 8
An ammoniacal metal salt solution gives a brilliant red precipitate on addition of dimethylglyoxime. The metal ion is:
- (A)
- (B)
- (C)
- (D)
The d-electronic configuration of in tetrahedral crystal field is . Sum of 'm' and 'number of unpaired electrons' is _______ .
The hybridization and magnetic behaviour of cobalt ion in complex, respectively is
- (A) and paramagnetic
- (B) and diamagnetic
- (C) and diamagnetic
- (D) and paramagnetic
Which of the following cannot be explained by crystal field theory?
- (A)The order of spectrochemical series
- (B)Stability of metal complexes
- (C)Magnetic properties of transition metal complexes
- (D)Colour of metal complexes
LIST-I contains metal species and LIST-II contains their properties.
[Given: Atomic number of Cr = 24, Ru = 44, Fe = 26]
Match each metal species in LIST-I with their properties in LIST-II, and choose the correct option
| LIST-I | LIST-II |
|---|---|
| I. | P. orbitals contain 4 electrons |
| II. | Q. |
| III. | R.Low spin complex ion |
| IV. | S.Metal ion in 4+ oxidation state |
| T. species |
- (A)I R, T; II P, S; III Q, T; IV P, Q
- (B)I R, S; II P, T; III P, Q; IV Q, T
- (C)I P, R; II R, S; III R, T; IV P, T
- (D)I Q, T; II S, T; III P, T; IV Q, R
should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization energy for this complex is (–) _________ . (Nearest integer)
Sum of oxidation state (magnitude) and coordination number of cobalt in Na[Co(bpy)Cl] is__.
(Given bpy = )
Total number of relatively more stable isomer(s) possible for octahedral complex [Cu(en)(SCN)] will be __________.
Match List I with List II
Choose the correct answer from the options given below:
| List I (Complex) | List II (Hybridization) |
|---|---|
| A. | I. |
| B. | II. |
| C. | III. |
| D. | IV. |
- (A)A-IV, B-I, C-III, D-II
- (B)A-I. B-IV, C-III, D-II
- (C)A-I. B-IV, C-II, D-III
- (D)A-IV, B-I, C-II. D-III
The spin only magnetic moment of the complex present in Fehling's reagent is______ B.M. (Nearest integer).
The conductivity of a solution of complex with formula corresponds to 1 : 1 electrolyte, then the primary valency of central metal ion is______
Low oxidation state of metals in their complexes are common when ligands:
- (A)have good π -accepting character
- (B)have good σ -donor character
- (C)are havind good π -donating ability
- (D)are havind poor σ -donating ability
The metal complex that is diamagnetic is (Atomic number : Fe, 26; Cu, 29)
- (A)
- (B)
- (C)
- (D)
The difference between spin only magnetic moment values of [Co(HO)]Cl and [Cr(HO)]Cl is___________.
Consider the following metal complexes :
The spin-only magnetic moment value of the complex that absorbs light with shortest wavelength is B.M. (Nearest integer)
Spin only magnetic moment of [MnBr] is____ B.M. (round off to the closest integer)
Given below are two statements .
Statement I : In CuSO.5HO, Cu-O bonds are present.
Statement II : In CuSO.5HO, ligands coordinating with Cu(II) ion are O-and S-based ligands.
In the light of the above statements, choose the correct answer from the options given below
- (A)Both Statement I and Statement II are correct
- (B)Both Statement I and Statement II are incorrect
- (C)Statement I is correct but Statement II is incorrect
- (D)Statement I is incorrect but Statement II is correct
For the reaction given below:
CoCl . xNH + AgNO (aq)
If two equivalents of AgCl precipitate out, then the value of x will be ______.
[Fe(CN)]
[Fe(CN)]
[Ti(CN)]
[Ni(CN)]
[Co(CN)]
Among the given complexes, number of paramagnetic complexes is ______.
(a) CoCl·4 NH
(b) CoCl·5NH
(c) CoCl·.6NH and
(d) CoCl(NO)·5NH
Number of complex(es) which will exist in cis-trans is/are
Number of complexes which will exhibit synergic bonding amongst, , and is ________.
Given below are two statements :
Statement I : is square planar and diamagnetic complex. with hybridization for Ni but is tetrahedral. paramagnetic and with -hybridication for Ni.
Statement II: and both have same d-electron configuration have same geometry and are paramagnetic.
In light the above statements. choose the correct answer form the options given below:
- (A)Both Statement I and Statement II are true.
- (B)Both Statement I and Statement II are false.
- (C)Statement I is correct but statement II is false.
- (D)Statement I is incorrect but statement II is true.
Which of the following will have maximum stabilization due to crystal field?
- (A)
- (B)
- (C)
- (D)
Arrange the following coordination compounds in the increasing order of magnetic moments.
(Atomic numbers: Mn = 25; Fe = 26)
(A) [FeF]
(B) [Fe(CN)]
(C) [MnCl] (high spin)
(D) [Mn(CN)]
- (A)A < B < D < C
- (B)B < D < C < A
- (C)A < C < D < B
- (D)B < D < A < C
Reaction of with excess ammonia and in the presence of oxygen results into a diamagnetic product. Number of electrons present in –orbitals of the product is ________ .
The spin–only magnetic moment value of an octahedral complex among , and , which upon reaction with excess of gives 2 moles of AgCl is ______ B.M. (Nearest Integer)
Amongst FeCl.3HO, K[Fe(CN)] and [Co(NH)]Cl, the spin-only magnetic moment value of the inner-orbital complex that absorbs light at shortest wavelength is________ B.M. [nearest integer]
White precipitate of AgCl dissolves in aqueous ammonia solution due to formation of :
- (A)
- (B)
- (C)
- (D)
If absorbs a light of wavelength 600 nm for d–d transition, then the value of octahedral crystal field splitting energy for will be__________× J. (Nearest Integer)
(Given : h = 6.63 × Js
and c = 3.08 × )
In the cobalt-carbonyl complex: [Co(CO)], number of Co-Co bonds is "X" and terminal CO ligands is "Y". X + Y =_____
Transition metal complex with highest value of crystal field splitting () will be
- (A)[Cr(HO)]
- (B)[Mo(HO)]
- (C)[Fe(HO)]
- (D)[Os(HO)]
The calculated spin only magnetic moments of and in BM, respectively, are
(Atomic numbers of Cr and Cu are 24 and 29, respectively)
- (A)3.87 and 2.84
- (B)4.90 and 1.73
- (C)3.87 and 1.73
- (D)4.90 and 2.84
The total number of possible isomers for is ______
The pair(s) of complexes wherein both exhibit tetrahedral geometry is(are)
(Note: py = pyridine
Given: Atomic numbers of Fe, Co, Ni and Cu are 26, 27, 28 and 29, respectively)
- (A)[FeCl] and [Fe(CO)]
- (B)[Co(CO)] and [CoCl]
- (C)[Ni(CO)] and [Ni(CN)]
- (D)[Cu(py)] and [Cu(CN)]
The Crystal Field Stabilization Energy (CFSE) and magnetic moment (spin-only) of an octahedral aqua complex of a metal ion (M) are −0.8 Δ and 3.87 BM, respectively. Identify (M) :
- (A)V
- (B)Cr
- (C)Mn
- (D)Co
The sum of oxidation states of two silver ions in [Ag(NH)] [Ag(CN)] complex is ______ .
The denticity of an organic ligand, biuret is :
- (A)2
- (B)4
- (C)3
- (D)6
Spin only magnetic moment in BM of is :
- (A)5.92
- (B)0
- (C)1
- (D)1.73
1 mol of an octahedral metal complex with formula on reaction with excess of gives 1 mol of AgCl. The denticity of Ligand L is ________ . (Integer answer)
The number of optical isomers possible for [Cr(CO)] is _____ .
Indicate the complex/complex ion which did not show any geometrical isomerism :
- (A)
- (B)
- (C)
- (D)
Arrange the following Cobalt complexes in the order of increasing Crystal Field Stabilization Energy (CFSE) value.
Complexes : (A), (B), (C) and
Choose the correct option :
- (A)A < B < C < D
- (B)B < A < C < D
- (C)B < C < D < A
- (D)C < D < B < A
Which one of the following complexes is violet in colour?
- (A)
- (B)
- (C)
- (D)
The overall stability constant of the complex ion is . The overall dissociations constant is . Then y is ______.(Nearest integer)
The ratio of number of water molecules in Mohr's salt and potash alum is _________ . (Integer answer)
The number of geometrical isomers possible in triamminetrinitrocobalt(III) is X and in trioxalatochromate(III) is Y. Then the value of X + Y is____________.
The number of geometrical isomers found in the metal complexes , , and respectively are
- (A)2,1,2,2
- (B)2,0,2,2
- (C)1,1,1,1
- (D)2,1,2,1
Given below are two statements:
Statement I : , and are dsp hybridised
Statement II : and are paramagnetic and have 4 and 5 unpaired electrons, respectively.
In the light of the above statements, choose the correct answer from the options given below:
- (A)Statement I is correct but Statement II is false
- (B)Both Statement I and Statement II are false
- (C)Statement I is incorrect but Statement II is true
- (D)Both Statement I and Statement II are true
The type of hybridisation and magnetic property of the complex , respectively, are:
- (A) and paramagnetic
- (B) and paramagnetic
- (C) and diamagnetic
- (D) and diamagnetic
3 moles of metal complex with formula Co(en)Cl, gives 3moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of Co in the complex is __________. (Round off to the Nearest Integer).
Which one of the following species responds to an external magnetic field?
- (A)
- (B)
- (C)
- (D)
Which one of the following metal complexes is most stable?
- (A)
- (B)
- (C)
- (D)
Three moles of AgCl get precipitated when one mole of an octahedral co-ordination compound with empirical formula CrCl · 3NH · 3HO reacts with excess of silver nitrate. The number of chloride ions satisfying the secondary valency of the metal ion is__________.
An aqueous solution of was heated with excess sodium cyanide in presence of strong oxidizing agent to form . The total change in number of unpaired electrons on metal centre is ________.
The spin only magnetic moment value for the complex [Co(CN)] is________ BM. [At. No. of Co= 27]
The correct order of intensity of colors of the compounds is:
- (A)
- (B)
- (C)
- (D)
Spin only magnetic moment of an octahedral complex of in the presence of a strong field ligand in BM is :
- (A)2.82
- (B)3.46
- (C)0
- (D)4.89
According to the valence bond theory the hybridization of central metal atom is for which one of the following compounds?
- (A)
- (B)
- (C)
- (D)
Match List-I with List-II
Choose the most appropriate answer from the options given below :
| List-I | List-II |
|---|---|
| a.Chlorophyll | i.Ruthenium |
| b.Vitamin-B | ii.Platinum |
| c.Anticancer drug | iii.Cobalt |
| d.Grubbs catalyst | iv.Magnesium |
- (A)a-iii, b-ii, c-iv, d-i
- (B)a-iv, b-iii, c-ii, d-i
- (C)a-iv, b-iii, c-i, d-ii
- (D)a-iv, b-ii, c-iii, d-i
The total number of unpaired electrons present in the complex K[Cr(oxalate)] is ______.
The correct structures of trans-[NiBr(PPh)] and meridonial-[Co(NH)(NO)], respectively, are
- (A)(1)
- (B)(2)
- (C)(3)
- (D)(4)
The secondary valency and the number of hydrogen bonded water molecule(s) in CuSO·5HO, respectively, are :
- (A)6 and 4
- (B)4 and 1
- (C)6 and 5
- (D)5 and 1
Match List-I with List-II :
Choose the correct answer from the options given below :
| List-I | List-II |
|---|---|
| a.[Co(NH)] [Cr(CN)] | i.Linkage isomerism |
| b.[Co(NH) (NO)] | ii.Solvate isomerism |
| c.[Cr(HO)]Cl | iii.Co-ordination isomerism |
| d.-[CrCl(ox)] | iv.Optical isomerism |
- (A)(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
- (B)(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
- (C)(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
- (D)(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
On complete reaction of FeCl with oxalic acid in aqueous solution containing KOH, resulted in the formation of product A. The secondary valency of Fe in the product A is ____.
(Round off to the Nearest Integer).
[Ti(HO)] absorbs light of wavelength 498 nm during a d – d transition. The octahedral splitting energy for the above complex is _____ × 10 J. (Round off to the Nearest Integer). h = 6.626 × 10 Js; c = 3 × 10 ms.
The equivalents of ethylene diamine required to replace the neutral ligands from the coordination sphere of the trans-complex of CoCl.4NH is _______. (Round off to the Nearest Integer).
The number of stereoisomers possible for is _____________[ox = oxalate]
Number of bridging CO ligands in [Mn(CO)] is _____.
The hybridization and magnetic nature of [Mn(CN)] and [Fe(CN)], respectively are:
- (A)dsp and paramagnetic
- (B)spd and paramagnetic
- (C)dsp and diamagnetic
- (D)spd and diamagnetic
If which of the following order the given complex ions are arranged correctly with respect to their decreasing spin only magnetic moment ? (i) [FeF6] (ii) [Co(NH3)6] (iii) [NiCl4] (iv) [Cu(NH3)4]
- (A)(ii)>(i)>(iii)>(iv)
- (B)(iii)>(iv)>(ii)>(i)
- (C)(ii)>(iii)>(i)>(iv)
- (D)(i)>(iii)>(iv)>(ii)
Given below are two statements : Statement I : The identification of Ni is carried out by dimethyl glyoxime in the presence of NH4OH Statement II : The dimethyl glyoxime is a bidentate neutral ligand. In the light of the above statements, choose the correct answer from the options given below :
- (A)Both statement I and statement II are true
- (B)Both statement I and statement II are false
- (C)Statement I is false but statement II is true
- (D)Statement I is true but statement II is false
The calculated magnetic moments (spin only value) for species , and respectively are :
- (A)5.92, 4.90 and 0 BM
- (B)5.82, O and 0 BM
- (C)4.90, 0 and 1.73 BM
- (D)4.90, 0 and 2.83 BM
The stepwise formation of is given below:
The value of stability constants , , and are , , and respectively. The overall equilibrium constants for dissociation of is . The value of x is ________. (Rounded off to the nearest integer)
In an experiment, 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 the compound X. Identify the correct statement(s)
- (A)If X is , deflection of the pan is upwards.
- (B)If X is , deflection of the pan is upwards.
- (C)If X is , deflection of the pan is downwards.
- (D)If X is , deflection of the pan is downwards.
Choose the correct statement(s) among the following :
- (A) has tetrahedral geometry.
- (B) has 2 geometrical isomers.
- (C) has higher spin-only magnetic moment than .
- (D)The cobalt ion in has hybridization.
The elevation of boiling point of 0.10 m aqueous solution is two times that of 0.05 m aqueous solution. The value of x is ______________
[Assume 100% ionisation of the complex and , coordination number of Cr as 6, and that all molecules are present inside the coordination sphere]
The species that has a spin – only magnetic moment of 5.9 BM, is:
( = tetrahedral)
- (A) (square planar)
- (B)
- (C)
- (D)
For a d metal ion in an octahedral field, the correct electronic configuration is:
- (A) when Δ < P
- (B) when Δ > P
- (C) when Δ < P
- (D) when Δ < P
Considering that , the magnetic moment (in BM) of would be __________.
The values of the crystal field stabilization energies for a high spin metal ion in octahedral and tetrahedral fields, respectively, are:
- (A) and
- (B) and
- (C) and
- (D) and
The total number of coordination sites in ethylenediaminetetraacetate () is ____.
Consider the complex ions,
trans (A) and
cis (B). The correct statement regarding them is:
- (A)both (A) and (B) cannot be optically active.
- (B)(A) cannot be optically active, but (B) can be optically active.
- (C)both (A) and (B) can be optically active.
- (D)(A) can be optically active, but (B) cannot be optically active.
The one that can exhibit highest paramagnetic behaviour among the following is:
gly = glycinato ; bpy = 2, 2'-bipyridine
- (A)
- (B)
- (C)
- (D)
The Crystal Field Stabilization Energy (CFSE) of is :
- (A)
- (B)
- (C)
- (D)
The number of isomers possible for is:
- (A)4
- (B)3
- (C)1
- (D)2
The pair in which both the species have the same magnetic moment (spin only) is:
- (A) and
- (B) and
- (C) and
- (D) and
The d – electron configuration of and , respectively are:
- (A) and
- (B) and
- (C) and
- (D) and
The complex that can shows optical activity is:
- (A)cis-[CrCl(ox)] (ox = oxalate)
- (B)trans-[Cr(Cl)(ox)]
- (C)cis-[Fe(NH)(CN)]
- (D)trans-[Fe(NH)(CN)]
The electronic spectrum of [Ti(HO)] shows a single broad peak with a maximum at 20,300 cm. The crystal field stabilization energy (CFSE) of the complex ion, in kJ mol, is: (1 kJ mol = 83.7 cm)
- (A)242.5
- (B)97
- (C)83.7
- (D)145.5
Complex A has a composition of HOClCr. If the complex on treatment with conc. HSO loses 13.5% of its original mass, the correct molecular formula of A is:
[Given : atomic mass of Cr = 52 amu and Cl = 35 amu]
- (A)
- (B)
- (C)
- (D)
Complex X of composition Cr(HO)Cl has a spin only magnetic moment of 3.83 BM. It reacts with AgNO and shows geometrical isomerism. The IUPAC nomenclature of X is:
- (A)Dichloridotetraaqua chromium (IV) chloride dihydrate
- (B)Tetraaquadichlorido chromium (III) chloride dihydrate
- (C)Tetraaquadichlorido chromium (IV) chloride dihydrate
- (D)Hexaaqua chromium (III) chloride
[Pd(F)(Cl)(Br)(I)] has n number of geometrical isomers. Then, the spin-only magnetic moment and crystal field stabilisation energy [CFSE] of [Fe(CN)], respectively, are: [Note: Ignore the pairing energy]
- (A)2.84 BM and
- (B)1.73 BM and
- (C)5.92 BM and 0
- (D)0 BM and
The isomer (s) of [Co(NH)Cl] that has/have a Cl – Co – Cl angle of 90º, is/are :
- (A)meridional and trans
- (B)cis only
- (C)trans only
- (D)cis and trans
Among (a) - (d), the complexes that can display geometrical isomerism are: (a) [Pt(NH)]Cl (b) [Pt(NH)Cl] (c) [Pt(NH)Cl(NO)] (d) [Pt(NH)ClBr]
- (A)(d) and (a)
- (B)(c) and (d)
- (C)(b) and (c)
- (D)(a) and (b)
The complex that can show fac- and mer-isomers is :
- (A)[CoCl(en)]
- (B)[Co(NH)(NO)]
- (C)[Pt(NH)Cl]
- (D)[Co(NH)Cl]
Complexes () of metals Ni and Fe have ideal square pyramidal and trigonal bipyramidal geometries, respectively. The sum of the , and L-M-L angles in the two complexes is ____
The correct order of the calculated spin-only magnetic moments of complexes (A) to (D) is: (a) Ni(CO) (b) [Ni(HO)]Cl (c) Na[Ni(CN)] (d) PdCl(PPh)
- (A)(c) (d) < (b) < (a)
- (B)(a) (c) < (b) (d)
- (C)(a) (c) (d) < (b)
- (D)(c) < (d) < (b) < (a)
Among the statements (a - d), the incorrect ones are: (a) Octahedral Co(III) complexes with strong field ligands have very high magnetic moments (b) When , the d-electron configuration of Co(III) in an octahedral complex is (c) Wavelength of light absorbed by is lower than that of (d) If the for an octahedral complex of Co(III) is 18,000 cm, the for its tetrahedral complex with the same ligand will be 16,000 cm
- (A)(b) and (c) only
- (B)(a) and (b) only
- (C)(c) and (d) only
- (D)(a) and (d) only
The number of possible optical isomers for the complexes with and hybridized metal atom, respectively is:
[Note: A and B are unidentate neutral and unidentate monoanionnic ligands, respectively]
- (A)2 and 2
- (B)0 and 2
- (C)0 and 1
- (D)0 and 0
The IUPAC name of the complex is [Pt(NH)Cl(NHCH)]Cl is
- (A)Diamminechlorido(aminomethane)platinum(II)chloride
- (B)Diamminechlorido(methanamine)platinum(II)chloride
- (C)Diammine(methanamine)chlorido platinum(II)chloride
- (D)Bisammine(methanamine)chloride platinum(II)chloride
The theory that can completely/properly explain the nature of bonding in [Ni(CO)] is
- (A)Werner's theory
- (B)Crystal field theory
- (C)Molecular orbital theory
- (D)Valence bond theory
Total number of \textit{cis} N-Mn-Cl bond angles (that is, Mn N and Mn Cl bonds in \textit{cis} positions) present in a molecule of \textit{cis}-[Mn(en)Cl] complex is______(en = NHCHCHNH)
Complete removal of both the axial ligands (along the z-axis) from an octahedral complex leads to which of the following splitting patterns? (relative orbital energies not on scale).
- (A)(A)
- (B)(B)
- (C)(C)
- (D)(D)
The complex ion that will lose its crystal field stabilization energy upon oxidation of its metal to +3 state is (Phen = the ligand shown, and ignore pairing energy)
- (A)
- (B)
- (C)
- (D)
The coordination numbers of Co and Al in [Co(Cl)(en)]Cl and K[Al(CO)], respectively, are
(en = ethane-1,2-diamine)
- (A)6 and 6
- (B)5 and 3
- (C)3 and 3
- (D)5 and 6
The compound used in the treatment of lead poisoning is:
- (A)EDTA
- (B)Cis-platin
- (C)D-penicillamine
- (D)desferrioxime B
Three complexes,
[CoCl(NH)] (I), [co(NH)HO] (II) and [Co(NH)] (III)
Absorb light in the visible region. The correct order of the wavelength of light absorbed by them is
- (A)(II) > (I) > (III)
- (B)(III) > (II) > (I)
- (C)(I) > (II) > (III)
- (D)(III) > (I) > (II)
The crystal field stabilization energy (CFSE) of [Fe(HO)]Cl and K[NiCl], respectively, are :-
- (A)−0.4Δ and −0.8Δ
- (B)−0.4Δ and −1.2Δ
- (C)−2.4Δ and −1.2Δ
- (D)−0.6Δ and −0.8Δ
The INCORRECT statement is:
- (A)the spin-only magnetic moments of [Fe(HO)] and [Cr(HO)] are nearly similar.
- (B)the spin-only magnetic moment of [Ni(NH)(HO)] is 2.83 BM.
- (C)the gemstone, ruby, has Cr ions occupying the octahedral sites of beryl.
- (D)the color of [CoCl(NH)] is violet as it absorbs the yellow light.
The species that can have a trans-isomer is:
(en = ethane-1,2-diamine, ox = oxalate)
- (A)[Pt(en)Cl]
- (B)[Pt(en)Cl]
- (C)[Cr(en)(ox)]
- (D)[Zn(en)Cl]
The one that will show optical activity is: (en = ethane-1, 2-diamine)
- (A)(A)
- (B)(B)
- (C)(C)
- (D)(D)
The maximum possible denticities of a ligand given below towards a common transition and inner – transition metal ion, respectively, are:
- (A)6 and 8
- (B)8 and 6
- (C)8 and 8
- (D)6 and 6
The number of water molecule(s) not coordinated to copper ion directly in , is:
- (A)1
- (B)3
- (C)2
- (D)4
The degenerate orbitals of are:
- (A) and
- (B) and
- (C) and
- (D) and
The correct statements among I to III are: I. Valence bond theory cannot explain the color exhibited by transition metal complexes II. Valence bond theory can predict quantitatively the magnetic properties of transition metal complexes III. Valence bond theory cannot distinguish ligands as weak and strong field ones
- (A)I and II only
- (B)I, II and III
- (C)I and III only
- (D)II and III only
The compound that inhibits the growth of tumors is:
- (A)trans -
- (B)trans -
- (C)cis -
- (D)cis -
The following ligand is:
- (A)tridentate
- (B)bidentate
- (C)tetradentate
- (D)hexadentate
The correct order of the spin only magnetic moment of metal ions in the following low spin complexes, , , , and , is:
- (A)
- (B)
- (C)
- (D)
The metal d-orbital that can directly facing the ligands in are
- (A) and
- (B) and
- (C) and
- (D) and
The pair of metal ions that can give a spin-only magnetic moment of 3.9 BM for the complex is
- (A) and
- (B) and
- (C) and
- (D) and
is an organometalic compound due to the presence of
- (A)Mn - C bond
- (B)Mn - Mn bond
- (C)Mn - O bond
- (D)C - O bond
The magnetic moment of an octahedral homoleptic Mn(II) complex is 5.9 BM. The suitable ligand for this complex is :
- (A)ethylenediamine
- (B)CN
- (C)NCS
- (D)CO
The coordination number of Th in is:
- (A)14
- (B)6
- (C)8
- (D)10
Match the metal column I with the coordination compounds/enzymes column II
| Column I (Metals) | Column II (Coordination compounds/enzymes) |
|---|---|
| a.Co | i.Wilkinson catalyst |
| b.Zn | ii.Chlorophyll |
| c.Rh | iii.Vitamin B12 |
| d.Mg | iv.Carbonic anhydrase |
- (A)a – iii, b – iv, c – i, d - ii
- (B)a – i, b – ii, c – iii, d – iv
- (C)a – ii, b – i, c – iv, d – iii
- (D)a – iv, b – iii, c – i, d – ii
The number of bridging CO ligand(s) and Co-Co bond(s) in Co (CO) respectively are:
- (A)2 and 1
- (B)2 and 0
- (C)0 and 2
- (D)4 and 0
The total number of isomers for a square planar complex [M(F)(Cl)(SCN)(NO)] is
- (A)16
- (B)8
- (C)4
- (D)12
Wilkinson catalyst is
- (A)[(PhP)IrCl]
- (B)[EtP)RhCl]
- (C)[(PhP)RhCl]
- (D)[(EtP)IrCl]
The complex that has highest crystal field splitting energy() is
- (A)[Co(NH)(HO)]Cl
- (B)K[CoCl]
- (C)[Co(NH)Cl]Cl
- (D)K[Co(CN)]
Two complexes [Cr(HO)]Cl (A) and [Cr(NH)]Cl (B) are violet and yellow coloured respectively. The incorrect statement regarding them is
- (A) values of (A) and (B) are calculated from the energies of violet and yellow light, respectively.
- (B)both are paramagnetic with three unpaired electrons
- (C)both absorbs energies corresponding to their complementary colours
- (D) value for (A) is less than that of (B)
The highest value of the calculated spin-only magnetic moment (in BM) among all the transition metal complexes is
- (A)5.92
- (B)6.93
- (C)3.87
- (D)4.90
Homoleptic octahedral complexes of a metal ion 'M' with three monodentate ligands L, L and L absorb wavelengths in the region of green, blue and red respectively. The increasing order of the ligand strength is
- (A)L < L < L
- (B)L < L < L
- (C)L < L < L
- (D)L < L < L
Match each set of hybrid orbitals from LIST-I with complex(es) given in LIST-II.
The correct option is
| LIST-I | LIST-II |
|---|---|
| P. | 1. |
| Q. | 2. |
| R. | 3. |
| S. | 4. |
| 5. | |
| 6. |
- (A)P 5; Q 4,6; R 2,3; S 1
- (B)P 5,6; Q 4; R 3; S 1,2
- (C)P 6; Q 4,5; R 1; S 2,3
- (D)P 4,6; Q 5,6; R 1,2; S 3
The correct statement(s) regarding the binary transition metal carbonyl compounds is (are)
(Atomic numbers: Fe = 26, Ni = 28)
- (A)Total number of valence shell electrons at metal centre in or is 16
- (B)These are predominantly low spin in nature
- (C)Metal–carbon bond strengthens when the oxidation state of the metal is lowered
- (D)The carbonyl C−O bond weakens when the oxidation state of the metal is increased
The correct option(s) regarding the complex (en = ) is (are)
- (A)It has two geometrical isomers
- (B)It will have three geometrical isomers if bidentate 'en' is replaced by two cyanide ligands
- (C)It is paramagnetic
- (D)It absorbs light at longer wavelength as compared to
Addition of excess aqueous ammonia to a pink coloured aqueous solution of (X) and gives an octahedral complex Y in the presence of air. In aqueous solution, complex Y behaves as 1 :3 electrolyte. The reaction of X with excess HCl at room temperature results in the formation of a blue coloured complex Z. The calculated spin only magnetic moment of X and Z is 3.87 B.M., whereas it is zero for complex Y.
Among the following options, which statement(s) is(are) correct?
- (A)The hybridization of the central metal ion in Y is
- (B)Z is a tetrahedral complex
- (C)Addition of silver nitrate to Y gives only two equivalents of silver chloride
- (D)When X and Z are in equilibrium at , the colour of the solution is pink
Among , , , , and , the total number of paramagnetic compounds is
- (A)2
- (B)3
- (C)4
- (D)5
The number of geometric isomers possible for the complex (L = ) is
The geometries of the ammonia complexes of , and , respectively, are
- (A)octahedral, square planar and tetrahedral
- (B)square planar, octahedral and tetrahedral
- (C)tetrahedral, square planar and octahedral
- (D)octahedral, tetrahedral and square planar
Among the complex ions, , , , , and , the number of complex ion(s) that show(s) - isomerism is
In the complex acetylbromidodicarbonylbis(triethylphosphine)iron(II), the number of Fe–C bond(s) is
For the octahedral complexes of in (thiocyanato-S) and in ligand environments, the difference between the spin-only magnetic moments in Bohr magnetons (When approximated to the nearest integer) is
[Atomic number of Fe = 26]
A list of species having the formula is given below. , , , , , , , and . Defining shape on the basis of the location of and atoms, the total number of species having a square planar shape is
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
(en = ; atomic numbers: Ti = 22, Cr = 24; Co = 27; Pt = 78)
| List-I | List-II |
|---|---|
| P. | 1.Paramagnetic and exhibits ionization isomerism |
| Q. | 2.Diamagnetic and exhibits cis-trans isomerism |
| R. | 3.Paramagnetic and exhibits cis-trans isomerism |
| S. | 4.Diamagnetic and exhibits ionization isomerism |
- (A)P-4, Q-2, R-3, S-1
- (B)P-3, Q-1, R-4, S-2
- (C)P-2, Q-1, R-3, S-4
- (D)P-1, Q-3, R-4, S-2
An aqueous solution of metal ion M1 reacts separately with reagents Q and R in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution of another metal ion M2 always forms tetrahedral complexes with these reagents. Aqueous solution of M2 on reaction with reagent S gives white precipitate which dissolves in excess of S. The reactions are summarized in the scheme given below.
M1, Q and R, respectively are
- (A), KCN and HCl
- (B), HCl and KCN
- (C), KCN and HCl
- (D), HCl and KCN
The pair(s) of coordination complexes/ions exhibiting the same kind of isomerism is(are)
- (A) and
- (B) and
- (C) and
- (D) and
EDTA is ethylenediaminetetraacetate ion. The total number of N – Co – O bond angles in complex ion is
Consider the following complex ions, P, Q and R: P = , Q = and R = . The correct order of the complex ions, according to their spin–only magnetic moment values (in B.M.) is
- (A)R < Q < P
- (B)Q < R < P
- (C)R < P < Q
- (D)Q < P < R
Coordination Compounds — frequently asked
How many questions from Coordination Compounds appear in JEE?
Coordination Compounds has appeared in 176 of the last 186 JEE Main and JEE Advanced papers — about 95% of them — contributing 318 questions in total across those papers.
Is Coordination Compounds an important chapter for JEE?
Judged by how often it is actually tested, it appears in roughly 95% of papers. Chapters above about 50% are effectively guaranteed to show up every session, so they repay thorough preparation; lower-frequency chapters are better treated as targeted revision.
Where do these Coordination Compounds questions come from?
Every question is from an official JEE Main or JEE Advanced paper, transcribed from the original paper and tagged to this chapter. Answers follow the official answer key.
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