JEE Main PYQs — Coordination Compounds

Identify the diamagnetic octahedral complex ions from below: A. [Mn(CN)6]3- B. [Co(NH3)6]3+ C. [Fe(CN)6]4- D. [Co(H2O)3F3] Choose the correct answer from the options given below:

Given below are two statements: Statement I: In octahedral complexes, when o < P high spin complexes are formed. When o > P low spin complexes are formed. Statement II: In tetrahedral complexes…

The d-orbital electronic configuration of the complex among [Co(en)3]3+, [CoF6]3-, [Mn(H2O)6]2+ and [Zn(H2O)6]2+ that has the highest CFSE is:

The type of hybridization and the magnetic property of [MnCl6]3- are:

The correct increasing order of stability of the complexes based on o value is: (I) [Mn(CN)6]3- (II) [Co(CN)6]4- (III) [Fe(CN)6]4- (IV) [Fe(CN)6]3-

Match List-I (Complex) with List-II (Hybridisation & Magnetic characters): (A) [MnBr4]2-, (B) [FeF6]3-, (C) [Co(C2O4)3]3-, (D) [Ni(CO)4] (I) d2sp3 & diamagnetic, (II) sp3d2 & paramagnetic, (III) sp3…

The calculated spin-only magnetic moments of K3[Fe(OH)6] and K4[Fe(OH)6] respectively are:

Identify the homoleptic complexes with odd number of d electrons in the central metal. (A) [FeO4]2- (B) [Fe(CN)6]3- (C) [Fe(CN)3NO]2- (D) [CoCl4]2- (E) [Co(H2O)3]3 Choose the correct answer from the…

An octahedral complex having molecular composition Co.5NH3.ClSO4 has two isomers A and B. The solution of A gives a white precipitate with AgNO3 solution and the solution of B gives white precipitate…

The number of unpaired electrons responsible for the paramagnetic nature of the following complex species are respectively: [Fe(CN)6]3-, [FeF6]3-, [CoF6]3-, [Mn(CN)6]3-

Which one of the following complexes will have 0 = 0 and = 5.96 B.M.? (a) [Fe(CN)6]4- (b) [Co(NH3)6]3+ (c) [FeF6]4- (d) [Mn(SCN)6]4-

Number of stereoisomers possible for the complexes, [CrCl3(py)3] and [CrCl3(ox)2]3- are respectively (py = pyridine, ox = oxalate)

The correct order of [FeF6]3-, [CoF6]3-, [Ni(CN)4]2- and [Ni(CO)4] complexes based on the number of unpaired electrons present is:

'X' is the number of electrons in t2g orbitals of the most stable complex ion among [Fe(NH3)6]3+, [FeCl6]3-, [Fe(C2O4)3]3- and [Fe(H2O)6]3+. The nature of oxide of vanadium of the type V2OX is:

The correct order of the complexes [Co(NH3)5(H2O)]3+ (A), [Co(NH3)6]3+ (B), [Co(CN)6]3- (C) and [CoCl(NH3)5]2+ (D) in terms of wavelength of light absorbed is:

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).…

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…

The number of species from the following that are involved in sp3d2 hybridization is: [Co(NH3)6]3+, SF6, [CrF6]3-, [CoF6]3-, [Mn(CN)6]3- and [MnCl6]3-

Match the LIST-I with LIST-II | LIST-I (Complex/Species) | LIST-II (Shape & magnetic moment) | |---|---| | A. [Ni(CO)4] | I. Tetrahedral, 2.8 BM | | B. [Ni(CN)4]2- | II. Square planar, 0 BM | | C.…

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

The correct order of ligands arranged in increasing field strength is:

F- ions convert hydroxyapatite into harder fluoroapatite. The formula of fluoroapatite is:

Identify the incorrect pair from the following:

Which of the following complex is homoleptic?

The correct IUPAC name of [PtBr2(PMe3)2] is:

The correct IUPAC name of K2MnO4 is:

The number of unpaired d-electrons in [Co(H2O)6]3+ is:

The correct IUPAC name of [Ni(CO)4] is:

The correct IUPAC name of [Co(en)2Cl2]NO3 is: (en = ethane-1,2-diamine)

The correct statement about [Ni(CO)4] and [Ni(CN)4]2- is:

The hybridisation and magnetic nature of [Ni(CO)4] and [Ni(CN)4]2- respectively are:

The hybridisation and number of unpaired electrons in [CoF6]3- are:

Match List I with List II: | | List-I (Molecule) | | List-II (Color) | | :--- | :--- | :--- | :--- | | A. | Fe4[Fe(CN)6]3 xH2O | I. | Violet | | B. | [Fe(CN)5NOS]4- | II. | Blood Red | | C. |…

Yellow compound of lead chromate gets dissolved on treatment with hot NaOH solution. The product of lead formed is a:

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)…

Given below are two statements: Statement (I): Dimethyl glyoxime forms a six membered covalent chelate when treated with NiCl₂ solution in presence of NH₄OH. Statement (II): Prussian blue precipitate…

Match List-I with List-II: (A) [Cr(NH3)6]3+ (B) [NiCl4]2- (C) [CoF6]3- (D) [Ni(CN)4]2- (I) 4.90 BM (II) 3.87 BM (III) 0.0 BM (IV) 2.83 BM | List-I (Complex) | List-II (Magnetic moment) |…

Given below are two statements: Assertion (A): The total number of geometrical isomers shown by [Co(en)2Cl2]+ complex ion is three. Reason (R): [Co(en)2Cl2]+ complex ion has an octahedral geometry.…

Match List I with List II: (A) K2[Ni(CN)4] (B) [Ni(CO)4] (C) [Co(NH3)6]Cl3 (D) Na3[CoF6] with (I) sp3 (II) sp3d2 (III) dsp2 (IV) d2sp3 | List-I (Complex) | List-II (Hybridisation) |…

The coordination environment of Ca²⁺ ion in its complex with EDTA⁴⁻ is:

Consider the following complex ions: P = [FeF6]3-, Q = [V(H2O)6]2+, R = [Fe(H2O)6]2+ The correct order of the complex ions, according to their spin only magnetic moment values (in B.M.) is:

Identify from the following species in which d²sp³ hybridization is shown by central atom:

Aluminium chloride in acidified aqueous solution forms an ion having geometry:

The correct statements from the 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…

Select the option with correct property:

The correct order of A, B, C and D in terms of wavenumber of light absorbed is: (A) [CoCl(NH3)5]2+ (B) [Co(CN)6]3- (C) [Co(NH3)5(H2O)]3+ (D) [Cu(H2O)4]2+

Match List-I with List-II (tetrahedral crystal field d-electron configurations): (A) TiCl4 (B) [FeO4]2- (C) [FeCl4]- (D) [CoCl4]2- with (I) e2, t20 (II) e4, t23 (III) e0, t20 (IV) e2, t23 | List-I…

Match List I with List II: (A) [Cr(H2O)6]3+ (B) [Fe(H2O)6]3+ (C) [Ni(H2O)6]2+ (D) [V(H2O)6]3+ with (I) t2g2 eg0 (II) t2g3 eg0 (III) t2g3 eg2 (IV) t2g6 eg2 | List-I (Complex) | List-II (t2g/eg config)…

Given below are two statements: Statement (I): A solution of [Ni(H2O)6]2+ is green in colour. Statement (II): A solution of [Ni(CN)4]2- is colourless. Choose the most appropriate answer:

[Co(NH3)6]3+ and [CoF6]3- are respectively known as:

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

The coordination geometry around the manganese in decacarbonyldimanganese(0) is:

An octahedral complex with the formula CoCl₃·nNH₃ upon reaction with excess of AgNO₃ solution gives 2 moles of AgCl. Consider the oxidation state of Co in the complex is 'x'. The value of "x + n" is…

If an iron(III) complex with the formula [Fe(NH3)x(CN)y]- has no electron in its eg orbital, then the value of x + y is:

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

The mismatched combinations are: A. Chlorophyll – Co B. Water hardness – EDTA C. Photography – [Ag(CN)2]- D. Wilkinson catalyst – [(Ph3P)3RhCl] E. Chelating ligand – D-Penicillamine

The primary and secondary valencies of cobalt respectively in [Co(NH3)5Cl]Cl2 are:

Which of the following is the correct order of ligand field strength?

Which of the following are examples of double salt? (A) FeSO4(NH4)2SO4 6H2O (B) CuSO4 4NH3 H2O (C) K2SO4 Al2(SO4)3 24H2O (D) Fe(CN)2 4KCN

The IUPAC name of K3[Co(C2O4)3] is:

The correct IUPAC name of [Cr(NH3)3(H2O)3]Cl3 is:

The correct IUPAC name of [Fe(CN)5(NO)]2- is:

The hybridisation and magnetic behaviour of [Fe(CN)6]4- are:

Correct order of spin only magnetic moment of the following complex ions is: (At. No. Fe: 26, Co: 27) (1) [FeF6]3- > [CoF6]3- > [Co(C2O4)3]3- (2) [Co(C2O4)3]3- > [CoF6]3- > [FeF6]3- (3) [FeF6]3- >…

The covalency and oxidation state respectively of boron in [BF4]-, are:

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

The correct IUPAC name of [Mn(CN)5(NO)]2- is:

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

If Ni²⁺ is replaced by Pt²⁺ in the complex [NiCl2Br2]2-, which of the following properties are expected to get changed? A. Geometry B. Geometrical isomerism C. Optical isomerism D. Magnetic properties

The total number of stereoisomers for the complex [Cr(ox)2ClBr]3- (where ox = oxalate) is:

The Cl–Co–Cl bond angle values in a fac-[Co(NH3)3Cl3] complex is/are:

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 [Fe(CN)6]3- is 1.74 BM, whereas for…

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

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

Match List-I with List-II: (A) [Cr(CN)6]3- (B) [Fe(H2O)6]2+ (C) [Co(NH3)6]3+ (D) [Ni(NH3)6]2+ Number of unpaired electrons: (I) 0 (II) 3 (III) 2 (IV) 4 | List-I (Complex) | List-II (Unpaired…

The octahedral diamagnetic low spin complex among the following is:

The correct order of the number of unpaired electrons in the given complexes is: (A) [Fe(CN)6]3- (B) [FeF6]3- (C) [CoF6]3- (D) [Cr(oxalate)3]3- (E) [Ni(CO)4]

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

The hybridization and magnetic behaviour of cobalt ion in [Co(NH3)6]3+ complex, respectively is:

1 L, 0.02 M solution of [Co(NH3)5SO4]Br is mixed with 1 L, 0.02 M solution of [Co(NH3)5Br]SO4. The resulting solution is divided into two equal parts (X) and treated with excess AgNO₃ and BaCl₂…

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 Z geometry. X, Y and…

Given below are two statements: Assertion A: In the complex Ni(CO)₄ and Fe(CO)₅, the metals have zero oxidation state. Reason R: Low oxidation states are found when a complex has ligands capable of…

Match List-I with List-II (CFSE values in units of 0): (A) [Ti(H2O)6]2+ (B) [V(H2O)6]2+ (C) [Mn(H2O)6]3+ (D) [Fe(H2O)6]3+ with (I) -1.2 (II) -0.6 (III) 0 (IV) -0.8 | List-I (Complex) | List-II (CFSE…

Match List I with List II (Colour): (A) Mg(NH4)PO4 (B) K3[Co(NO2)6] (C) MnO(OH)2 (D) Fe4[Fe(CN)6]3 with (I) brown (II) white (III) yellow (IV) blue | List-I (Compound) | List-II (Colour) |…

Given below are two statements: Assertion A: [CoCl(NH3)5]2+ absorbs at lower wavelength of light with respect to [Co(NH3)5(H2O)]3+. Reason R: It is because the wavelength of light absorbed depends on…

Match List I with List II (CFSE in units of 0): (A) [Cu(NH3)6]2+ (B) [Ti(H2O)6]3+ (C) [Fe(CN)6]3- (D) [NiF6]4- with (I) -0.6 (II) -2.0 (III) -1.2 (IV) -0.4 | List-I (Complex) | List-II (CFSE / 0) |…

The complex with highest magnitude of crystal field splitting energy (Δ₀) is:

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

Match List I with List II (wavelength of light absorbed in nm): (A) [CoCl(NH3)5]2+ (B) [Co(NH3)6]3+ (C) [Co(CN)6]3- (D) [Cu(H2O)4]2+ with (I) 310 (II) 475 (III) 535 (IV) 600 | List-I (Complex) |…

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

The complex that dissolves in water is:

Chiral complex from the following is: (en = ethylene diamine)

The complex cation which has two isomers is:

The correct IUPAC name of [CoCl2(en)2]Cl is: (en = ethane-1,2-diamine)

The correct statement about [Fe(CN)6]3- is:

The hybridisation of [Cr(NH3)6]3+ and [NiCl4]2- are respectively:

White precipitate of AgCl dissolves in aqueous ammonia solution due to formation of:

Given below are two statements: Statement I: In CuSO₄·5H₂O, Cu–O bonds are present. Statement II: In CuSO₄·5H₂O, ligands coordinating with Cu(II) ion are O- and S-based ligands. Choose the correct…

The metal complex that is diamagnetic is: (Atomic number: Fe, 26; Cu, 29)

Fe³⁺ cation gives a prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of:

Match List-I with List-II: (A) Ni(CO)4 (B) [Ni(CN)4]2- (C) [Co(CN)6]3- (D) [CoF6]3- with (I) sp3 (II) sp3d2 (III) d2sp3 (IV) dsp2 | List-I (Complex) | List-II (Hybridisation) |…

Arrange the following coordination compounds in the increasing order of magnetic moments (Atomic numbers: Mn=25, Fe=26): A. [FeF6]3- B. [Fe(CN)6]3- C. [MnCl6]3- (high spin) D. [Mn(CN)6]3-

Given below are two statements: Statement I: [Ni(CN)4]2- is square planar and diamagnetic complex, with dsp² hybridization for Ni but [Ni(CO)4] is tetrahedral, paramagnetic and with sp³ hybridization…

The correct order of energy of absorption for the following metal complexes is: A: [Ni(en)3]2+, B: [Ni(NH3)6]2+, C: [Ni(H2O)6]2+

Transition metal complex with highest value of crystal field splitting (Δ₀) will be:

Which of the following will have maximum stabilization due to crystal field?

Low oxidation state of metals in their complexes are common when ligands:

Octahedral complexes of copper(II) undergo structural distortion (Jahn-Teller). Which one of the given copper(II) complexes will show the maximum structural distortion? (en = ethylenediamine)

Match: (a) Chlorophyll, (b) Vitamin-B₁₂, (c) Anticancer drug, (d) Grubbs catalyst with (i) Ru, (ii) Pt, (iii) Co, (iv) Mg

Match List-I with List-II: (a) [Co(NH3)6][Cr(CN)6], (b) [Co(NH3)3(NO2)3], (c) [Cr(H2O)6]Cl3, (d) cis-[CrCl2(ox)2]3- with (i) Linkage, (ii) Solvate, (iii) Coordination, (iv) Optical isomerism | List-I…

What is the spin-only magnetic moment value (B.M.) of a divalent metal ion with atomic number 25, in its aqueous solution?

The calculated magnetic moments (spin only value) for species [FeCl4]2-, [Co(C2O4)3]3- and MnO42- respectively are:

The hybridization and magnetic nature of [Mn(CN)6]4- and [Fe(CN)6]3-, respectively are:

In which of the following order are the given complex ions arranged correctly with respect to their decreasing spin only magnetic moment? (i) [FeF6]3- (ii) [Co(NH3)6]3+ (iii) [NiCl4]2- (iv)…

The Crystal Field Stabilization Energy (CFSE) and magnetic moment (spin-only) of an octahedral aqua complex of a metal ion (Mz+) are -0.80 and 3.87 BM, respectively. Identify (Mz+):

The denticity of an organic ligand, biuret is:

Which one of the following metal complexes is most stable?

The secondary valency and the number of hydrogen bonded water molecule(s) in CuSO₄·5H₂O, respectively, are:

Given below are two statements: Statement I: The identification of Ni²⁺ is carried out by dimethyl glyoxime in the presence of NH₄OH. Statement II: The dimethyl glyoxime is a bidentate neutral…

Spin only magnetic moment in BM of [Fe(CO)4(C2O4)]+ is:

Spin only magnetic moment of an octahedral complex of Fe²⁺ in the presence of a strong field ligand in BM is:

Which one of the following species responds to an external magnetic field?

Arrange the following metal complex/compounds in the increasing order of spin only magnetic moment. Presume all three are high spin systems. (Atomic numbers: Ce=58, Gd=64, Eu=63) (a) (NH4)2[Ce(NO3)6]…

Which one of the following complexes is violet in colour?

Arrange the following Cobalt complexes in the order of increasing Crystal Field Stabilization Energy (CFSE) value: A: [CoF6]3- B: [Co(H2O)6]2+ C: [Co(NH3)6]3+ D: [Co(en)3]3+

Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a Prussian blue coloured colloidal species. It is:

The correct order of intensity of colors of the compounds is:

Indicate the complex/complex ion which did NOT show any geometrical isomerism:

The number of geometrical isomers found in the metal complexes [PtCl2(NH3)2], [Ni(CO)4], [Ru(H2O)3Cl3] and [CoCl2(NH3)4]+ respectively, are:

The correct structures of trans-[NiBr2(PPh3)2] and meridional-[Co(NH3)3(NO2)3] respectively, are: (Options show structural diagrams — select the one with Br trans to each other in square planar, and…

The addition of dilute NaOH to Cr³⁺ salt solution will give:

The IUPAC name of [Pt(NH3)2Cl(NH2CH3)]Cl is:

The correct IUPAC name of [Co(NH3)4(H2O)Cl]Cl2 is:

The correct IUPAC name of K2[PtCl4] is:

The theory that can completely/properly explain the nature of bonding in [Ni(CO)4] is:

Simplified absorption spectra of three complexes (i), (ii) and (iii) of Mn+ ion are provided. Their values are marked as A, B and C respectively. The correct match between the complexes and their…

Complex X of composition Cr(H2O)6Cln has a spin only magnetic moment of 3.83 B.M. It reacts with AgNO₃ and shows geometrical isomerism. The IUPAC nomenclature of X is:

The complex that can show fac- and mer-isomers is:

Among (a)-(d), the complexes that can show geometrical isomerism are: (a) [Pt(NH3)3Cl]+ (b) [Pt(NH3)Cl5]- (c) [Pt(NH3)2Cl(NO2)] (d) [Pt(NH3)4ClBr]2+

Complex A has a composition of H₁₂O₆Cl₃Cr. If the complex on treatment with conc. H₂SO₄ loses 13.5% of its original mass, the correct molecular formula of A is: (Given: atomic mass of Cr = 52 amu and…

The pair in which both the species have the same magnetic moment (spin only) is:

The species that has a spin-only magnetic moment of 5.9 BM, is: (Td = tetrahedral)

The correct order of the calculated spin-only magnetic moments of complexes (A) to (D) is: (A) Ni(CO)₄ (B) [Ni(H₂O)₆]Cl₂ (C) Na₂[Ni(CN)₄] (D) PdCl₂(PPh₃)₂

The correct order of the spin-only magnetic moments of the following complexes is: (I) [Cr(H2O)6]Br2 (II) Na4[Fe(CN)6] (III) Na3[Fe(C2O4)3] (0 > P) (IV) (Et4N)2[CoCl4]

For octahedral Mn(II) and tetrahedral Ni(II) complexes, consider the following statements: (I) Both the complexes can be high spin. (II) Ni(II) complex can very rarely be of low spin. (III) With…

The electronic spectrum of [Ti(H2O)6]3+ shows a single broad peak with a maximum at 20,300 cm⁻¹. The crystal field stabilization energy (CFSE) of the complex ion, in kJ mol⁻¹, is: (1 kJ mol⁻¹ = 83.7…

The d-electron configuration of [Ru(en)3]Cl2 and [Fe(H2O)6]Cl2 respectively are:

The Crystal Field Stabilization Energy (CFSE) of [CoF3(H2O)3] (0 < P) is:

The values of the crystal field stabilization energies for a high spin d⁶ metal ion in octahedral and tetrahedral fields, respectively, are:

For a d⁴ metal ion in an octahedral field, the correct electronic configuration is:

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 Δ₀ < P, the d-electron configuration of…

The one that is not expected to show isomerism is:

The complex that can show optical activity is:

The number of isomers possible for [Pt(en)(NO2)2] is:

Consider the complex ions, trans-[Co(en)2Cl2]+ (A) and cis-[Co(en)2Cl2]+ (B). The correct statement regarding them is:

The number of possible optical isomers for the complexes MA₂B₂ with sp³ and dsp² hybridized metal atom, respectively, is: (A and B are unidentate neutral and unidentate monoanionic ligands,…

[Pd(F)(Cl)(Br)(I)]2- has n number of geometrical isomers. Then, the spin-only magnetic moment and crystal field stabilization energy (CFSE) of [Fe(CN)6]n-6, respectively, are: (Note: Ignore the…

The isomer(s) of [Co(NH3)4Cl2] that has/have a Cl–Co–Cl angle of 90°, is/are:

The one that will show optical activity is: (en = ethane-1,2-diamine) (Options show structural diagrams of various Co complexes with en ligands)

Consider that d⁶ metal ion (M²⁺) forms a complex with aqua ligands, and the spin only magnetic moment of the complex is 4.90 BM. The geometry and the crystal field stabilization energy of the complex…

The one that can exhibit highest paramagnetic behaviour among the following is: (gly = glycinato; bpy = 2,2'-bipyridine)

The coordination numbers of Co and Al in [Co(Cl)(en)2]Cl and K3[Al(C2O4)3] respectively are: (en = ethane-1,2-diamine)

The compound used in the treatment of lead poisoning is:

The coordination number of Th in K4[Th(C2O4)4(H2O)2] is:

The calculated spin-only magnetic moments (BM) of the anionic and cationic species of [Fe(H2O)6]2+ and [Fe(CN)6]4- respectively, are:

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…

A ligand with the structure shown below is: (The ligand has two phenol-O and one amine-N donor groups in a branched structure with tert-butyl substituents)

The compound that inhibits the growth of tumors is:

The maximum possible denticities of EDTA towards a common transition metal ion and an inner-transition metal ion, respectively, are: (EDTA = ethylenediaminetetraacetate)

The incorrect statement is:

Homoleptic octahedral complexes of a metal ion M³⁺ with three monodentate ligands L₁, L₂ and L₃ absorb wavelengths in the region of green, blue and red respectively. The increasing order of the…

Wilkinson catalyst is:

Match the metals (column I) with the coordination compound(s)/enzyme(s) (column II): (A) Co → (B) Zn → (C) Rh → (D) Mg (i) Wilkinson catalyst (ii) Chlorophyll (iii) Vitamin B₁₂ (iv) Carbonic anhydrase

The correct order of the spin-only magnetic moment of metal ions in the following low-spin complexes, [V(CN)6]4-, [Fe(CN)6]4-, [Ru(NH3)6]3+ and [Cr(NH3)6]2+, is:

The pair of metal ions that can give a spin only magnetic moment of 3.9 BM for the complex [M(H2O)6]Cl2, is:

The metal's d-orbitals that are directly facing the ligands in K3[Co(CN)6] are:

The magnetic moment of an octahedral homoleptic Mn(II) complex is 5.9 B.M. The suitable ligand for this complex is:

The degenerate orbitals of [Cr(H2O)6]3+ are:

Three complexes, [CoCl(NH3)5]2+ (I), [Co(NH3)5H2O]3+ (II) and [Co(NH3)6]3+ (III) absorb light in the visible region. The correct order of the wavelength of light absorbed by them is:

The crystal field stabilization energy (CFSE) of [Fe(H2O)6]Cl2 and K2[NiCl4], respectively, are:

Complete removal of both the axial ligands (along the z-axis) from an octahedral complex leads to which of the following splitting patterns? (This gives a square planar complex — the correct pattern…

The complex that has highest crystal field splitting energy (Δ), is:

The difference in the number of unpaired electrons of a metal ion in its high-spin and low-spin octahedral complexes is two. The metal ion is:

The number of bridging CO ligand(s) and Co–Co bond(s) in Co₂(CO)₈, respectively are:

Mn₂(CO)₁₀ is an organometallic compound due to the presence of:

The species that can have a trans-isomer is: (en = ethane-1,2-diamine, ox = oxalate)

The total number of isomers for a square planar complex: [MCl(F)(NO2)(SCN)] is:

A reaction of cobalt(III) chloride and ethylenediamine in a 1:2 mole ratio generates two isomeric products A (violet-coloured) and B (green-coloured). A can show optical activity, but B is optically…

The complex ion that will lose its crystal field stabilization energy upon oxidation of metal to +3 state is: (phen = 1,10-phenanthroline, a strong field bidentate ligand; ignore pairing energy)

Two complexes [Cr(H2O)6]Cl3 (A) and [Cr(NH3)6]Cl3 (B) are violet and yellow coloured, respectively. The incorrect statement regarding them is: