Coordination Compounds · Chemistry · JEE Main

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MCQ (Single Correct Answer)

JEE Main 2024 (Online) 5th April Morning Shift
The correct order of ligands arranged in increasing field strength.
JEE Main 2024 (Online) 5th April Morning Shift
Which one of the following complexes will exhibit the least paramagnetic behaviour ? [Atomic number, $$\mathrm{Cr}=24, \mathrm{Mn}=25, \mathrm{Fe}=26,...
JEE Main 2024 (Online) 9th April Evening Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2024 (Online) 9th April Evening Shift
The coordination environment of $$\mathrm{Ca}^{2+}$$ ion in its complex with $$\mathrm{EDTA}^{4-}$$ is :
JEE Main 2024 (Online) 9th April Morning Shift
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The total number of geometri...
JEE Main 2024 (Online) 8th April Evening Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2024 (Online) 8th April Morning Shift
Number of Complexes with even number of electrons in $$\mathrm{t_{2 g}}$$ orbitals is - $$\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\righ...
JEE Main 2024 (Online) 8th April Morning Shift
An octahedral complex with the formula $$\mathrm{CoCl}_3 \cdot \mathrm{nNH}_3$$ upon reaction with excess of $$\mathrm{AgNO}_3$$ solution gives 2 mole...
JEE Main 2024 (Online) 8th April Morning Shift
Given below are two statements: Statement I: $$\mathrm{N}\left(\mathrm{CH}_3\right)_3$$ and $$\mathrm{P}\left(\mathrm{CH}_3\right)_3$$ can act as liga...
JEE Main 2024 (Online) 8th April Morning Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2024 (Online) 4th April Evening Shift
If an iron (III) complex with the formula $$\left[\mathrm{Fe}\left(\mathrm{NH}_3\right)_x(\mathrm{CN})_y\right]^-$$ has no electron in its $$e_g$$ orb...
JEE Main 2024 (Online) 4th April Evening Shift
The number of unpaired d-electrons in $$\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$$ is ________.
JEE Main 2024 (Online) 4th April Evening Shift
A first row transition metal in its +2 oxidation state has a spin-only magnetic moment value of $$3.86 \mathrm{~BM}$$. The atomic number of the metal ...
JEE Main 2024 (Online) 4th April Morning Shift
Number of complexes from the following with even number of unpaired "$$\mathrm{d}$$" electrons is ________ $$[\mathrm{V}(\mathrm{H}_2 \mathrm{O})_6]^{...
JEE Main 2024 (Online) 4th April Morning Shift
The correct sequence of ligands in the order of decreasing field strength is :
JEE Main 2024 (Online) 1st February Evening Shift
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ and $\left[\mathrm{CoF}_6\right]^{3-}$ are respectively known as :
JEE Main 2024 (Online) 1st February Evening Shift
Given below are two statements : Statement (I) : Dimethyl glyoxime forms a six-membered covalent chelate when treated with $\mathrm{NiCl}_2$ solution ...
JEE Main 2024 (Online) 1st February Evening Shift
Which of the following compounds show colour due to d-d transition?
JEE Main 2024 (Online) 1st February Morning Shift
Which of the following complex is homoleptic?
JEE Main 2024 (Online) 1st February Morning Shift
Given below are two statements : Statement (I) : A solution of $\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$ is green in colou...
JEE Main 2024 (Online) 31st January Evening Shift
Select the option with correct property -
JEE Main 2024 (Online) 31st January Evening Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2024 (Online) 31st January Morning Shift
The correct statements from following are: A. The strength of anionic ligands can be explained by crystal field theory. B. Valence bond theory does no...
JEE Main 2024 (Online) 30th January Evening Shift
The coordination geometry around the manganese in decacarbonyldimanganese $$(0)$$ is
JEE Main 2024 (Online) 30th January Morning Shift
Choose the correct statements from the following : (A) Ethane-1, 2-diamine is a chelating ligand. (B) Metallic aluminium is produced by electrolysis o...
JEE Main 2024 (Online) 29th January Evening Shift
A reagent which gives brilliant red precipitate with Nickel ions in basic medium is
JEE Main 2024 (Online) 29th January Morning Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2024 (Online) 29th January Morning Shift
In which one of the following metal carbonyls, $$\mathrm{CO}$$ forms a bridge between metal atoms?
JEE Main 2024 (Online) 27th January Evening Shift
Identity the incorrect pair from the following :
JEE Main 2024 (Online) 27th January Evening Shift
Identify from the following species in which $$\mathrm{d}^2 \mathrm{sp}^3$$ hybridization is shown by central atom :
JEE Main 2024 (Online) 27th January Morning Shift
Consider the following complex ions $$\begin{aligned} & \mathrm{P}=\left[\mathrm{FeF}_6\right]^{3-} \\ & \mathrm{Q}=\left[\mathrm{V}\left(\mathrm{H}_2...
JEE Main 2024 (Online) 27th January Morning Shift
Yellow compound of lead chromate gets dissolved on treatment with hot $$\mathrm{NaOH}$$ solution. The product of lead formed is a :
JEE Main 2023 (Online) 15th April Morning Shift
The complex with highest magnitude of crystal field splitting energy $\left(\Delta_{0}\right)$ is :
JEE Main 2023 (Online) 13th April Evening Shift
The total number of stereoisomers for the complex $$\left[\mathrm{Cr}(o x)_{2} \mathrm{ClBr}\right]^{3-}$$ (where $$o x=$$ oxalate) is :
JEE Main 2023 (Online) 13th April Evening Shift
Which of the following complexes will exhibit maximum attraction to an applied magnetic field?
JEE Main 2023 (Online) 13th April Morning Shift
The mismatched combinations are A. Chlorophyll - Co B. Water hardness - EDTA C. Photography $$-\left[\mathrm{Ag}(\mathrm{CN})_{2}\right]^{-}$$ D. Wilk...
JEE Main 2023 (Online) 12th April Morning Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 11th April Evening Shift
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : $$\left[\mathrm{CoCl}\left(\mathrm...
JEE Main 2023 (Online) 11th April Evening Shift
If $$\mathrm{Ni}^{2+}$$ is replaced by $$\mathrm{Pt}^{2+}$$ in the complex $$\left[\mathrm{NiCl}_{2} \mathrm{Br}_{2}\right]^{2-}$$, which of the follo...
JEE Main 2023 (Online) 11th April Evening Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 11th April Evening Shift
The magnetic moment is measured in Bohr Magneton (BM). Spin only magnetic moment of $$\mathrm{Fe}$$ in $$\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm...
JEE Main 2023 (Online) 11th April Morning Shift
The complex that dissolves in water is :
JEE Main 2023 (Online) 11th April Morning Shift
The set which does not have ambidentate ligand(s) is :
JEE Main 2023 (Online) 11th April Morning Shift
Which of the following complex has a possibility to exist as meridional isomer?
JEE Main 2023 (Online) 10th April Evening Shift
The correct order of the number of unpaired electrons in the given complexes is A. $$\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$$ B. $$\left[\math...
JEE Main 2023 (Online) 10th April Evening Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 10th April Morning Shift
The octahedral diamagnetic low spin complex among the following is :
JEE Main 2023 (Online) 8th April Evening Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 8th April Morning Shift
Which of the following complex is octahedral, diamagnetic and the most stable?
JEE Main 2023 (Online) 8th April Morning Shift
The correct order of spin only magnetic moments for the following complex ions is
JEE Main 2023 (Online) 6th April Evening Shift
The IUPAC name of $$\mathrm{K}_{3}\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]$$ is:-
JEE Main 2023 (Online) 6th April Morning Shift
Given below are two statements, one is labelled as Assertion $$\mathbf{A}$$ and the other is labelled as Reason $$\mathbf{R}$$. Assertion A: The spin ...
JEE Main 2023 (Online) 1st February Evening Shift
The complex cation which has two isomers is :
JEE Main 2023 (Online) 1st February Morning Shift
Which of the following complex will show largest splitting of d-orbitals?
JEE Main 2023 (Online) 1st February Morning Shift
Which of the following are the example of double salt? A. $$\mathrm{FeSO}_{4} \cdot\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \cdot 6 \mathrm{H}...
JEE Main 2023 (Online) 1st February Morning Shift
A solution of $$\mathrm{FeCl_3}$$ when treated with $$\mathrm{K_4[Fe(CN)_6]}$$ gives a prussium blue precipitate due to the formation of :
JEE Main 2023 (Online) 31st January Morning Shift
Cobalt chloride when dissolved in water forms pink colored complex $$\underline{\mathrm{X}}$$ which has octahedral geometry. This solution on treating...
JEE Main 2023 (Online) 30th January Evening Shift
Match List I with List II: .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-famil...
JEE Main 2023 (Online) 30th January Evening Shift
The $\mathrm{Cl}-\mathrm{Co}-\mathrm{Cl}$ bond angle values in a fac- $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3} \mathrm{Cl}_{3}\right]$ compl...
JEE Main 2023 (Online) 30th January Morning Shift
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...
JEE Main 2023 (Online) 30th January Morning Shift
Which of the following is correct order of ligand field strength?
JEE Main 2023 (Online) 29th January Evening Shift
Correct order of spin only magnetic moment of the following complex ions is : (Given At.no. Fe : 26, Co : 27)
JEE Main 2023 (Online) 29th January Morning Shift
Chiral complex from the following is : Here en = ethylene diamine
JEE Main 2023 (Online) 25th January Evening Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 24th January Evening Shift
The hybridization and magnetic behaviour of cobalt ion in $$\mathrm{[Co(NH_3)_6]^{3+}}$$ complex, respectively is :
JEE Main 2023 (Online) 24th January Evening Shift
Which of the following cannot be explained by crystal field theory?
JEE Main 2023 (Online) 24th January Morning Shift
The primary and secondary valencies of cobalt respectively in $$\mathrm{[Co(NH_3)_5Cl]Cl_2}$$ are :
JEE Main 2022 (Online) 29th July Evening Shift
Octahedral complexes of copper(II) undergo structural distortion (Jahn-Teller). Which one of the given copper (II) complexes will show the maximum str...
JEE Main 2022 (Online) 28th July Evening Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2022 (Online) 27th July Evening Shift
Low oxidation state of metals in their complexes are common when ligands :
JEE Main 2022 (Online) 27th July Evening Shift
$$\mathrm{Fe}^{3+}$$ cation gives a prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of :
JEE Main 2022 (Online) 26th July Evening Shift
The metal complex that is diamagnetic is (Atomic number: $$\mathrm{Fe}, 26 ; \mathrm{Cu}, 29)$$
JEE Main 2022 (Online) 25th July Evening Shift
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+...
JEE Main 2022 (Online) 30th June Morning Shift
Correct formula of the compound which gives a white precipitate with BaCl2 solution, but not with AgNO3 solution, is :
JEE Main 2022 (Online) 29th June Evening Shift
Given below are two statements. $$\bullet$$ Statement I : In CuSO4 . 5H2O, Cu-O bonds are present. $$\bullet$$ Statement II : In CuSO4 . 5H2O, ligands...
JEE Main 2022 (Online) 28th June Morning Shift
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] ...
JEE Main 2022 (Online) 27th June Evening Shift
Arrange the following coordination compounds in the increasing order of magnetic moments. (Atomic numbers : Mn = 25; Fe = 26) A. [FeF6]3$$-$$ B. [Fe(C...
JEE Main 2022 (Online) 27th June Morning Shift
Which of the following will have maximum stabilization due to crystal field?
JEE Main 2022 (Online) 26th June Morning Shift
Which statement is not true with respect to nitrate ion test?
JEE Main 2022 (Online) 24th June Evening Shift
Transition metal complex with highest value of crystal field splitting ($$\Delta$$0) will be :
JEE Main 2022 (Online) 24th June Morning Shift
Match List - I with List - II : .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-...
JEE Main 2021 (Online) 1st September Evening Shift
The Crystal Field Stabilization Energy (CFSE) and magnetic moment (spin-only) of an octahedral aqua complex of a metal ion (Mz+) are $$-$$0.8 $$\Delta...
JEE Main 2021 (Online) 1st September Evening Shift
The potassium ferrocyanide solution gives a Prussian blue colour, when added to :
JEE Main 2021 (Online) 31st August Evening Shift
Spin only magnetic moment in BM of [Fe(CO)4(C2O4)]+ is :
JEE Main 2021 (Online) 31st August Morning Shift
The denticity of an organic ligand, biuret is :
JEE Main 2021 (Online) 26th August Evening Shift
Indicate the complex/complex ion which did not show any geometrical isomerism :
JEE Main 2021 (Online) 26th August Evening Shift
Arrange the following Cobalt complexes in the order of increasing Crystal Field Stabilization Energy (CFSE) value.Complexes : $$\mathop {{{[Co{F_6}]}^...
JEE Main 2021 (Online) 27th July Evening Shift
Given below are two statements :Statement I : $${[Mn{(CN)_6}]^{3 - }}$$, $${[Fe{(CN)_6}]^{3 - }}$$ and $${[Co{({C_2}{O_4})_3}]^{3 - }}$$ are d2sp3 hyb...
JEE Main 2021 (Online) 27th July Morning Shift
The type of hybridisation and magnetic property of the complex [MnCl6]3$$-$$, respectively, are :
JEE Main 2021 (Online) 27th July Morning Shift
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 :...
JEE Main 2021 (Online) 25th July Evening Shift
Which one of the following metal complexes is most stable?
JEE Main 2021 (Online) 25th July Morning Shift
Which one of the following species responds to an external magnetic field?
JEE Main 2021 (Online) 20th July Evening Shift
Spin only magnetic moment of an octahedral complex of Fe2+ in the presence of a strong field ligand in BM is :
JEE Main 2021 (Online) 20th July Evening Shift
Which one of the following species doesn't have a magnetic moment of 1.73 BM, (spin only value)?
JEE Main 2021 (Online) 20th July Morning Shift
According to the valence bond theory the hybridization of central metal atom is dsp2 for which one of the following compounds?
JEE Main 2021 (Online) 20th July Morning Shift
The correct order of intensity of colors of the compounds is :
JEE Main 2021 (Online) 18th March Evening Shift
The secondary valency and the number of hydrogen bonded water molecule(s) in CuSO4 . 5H2O, respectively, are :
JEE Main 2021 (Online) 18th March Morning Shift
The correct structures of trans-[NiBr2(PPh3)2] and meridonial-[Co(NH3)3(NO2)3], respectively, are...
JEE Main 2021 (Online) 17th March Evening Shift
Match List - I with List - II : List - I List - II (a) $$[Co{(N{H_3})_6}][Cr{(CN)_6}]$$ (i) Linkage isom...
JEE Main 2021 (Online) 25th February Evening Shift
In which of the following order the given complex ions are arranged correctly with respect to their decreasing spin only magnetic moment?(i) [FeF6]3$$...
JEE Main 2021 (Online) 25th February Morning Shift
The hybridization and magnetic nature of $${[Mn{(CN)_6}]^{4 - }}$$ and $${[Fe{(CN)_6}]^{3 - }}$$, respectively are :
JEE Main 2021 (Online) 24th February Evening Shift
The calculated magnetic moments (spin only value) for species $${[FeC{l_4}]^{2 - }}$$, $${[Co{({C_2}{O_4})_3}]^{3 - }}$$ and $$MnO_4^{2 - }$$ respecti...
JEE Main 2020 (Online) 6th September Evening Slot
For a d4 metal ion in an octahedral field, the correct electronic configuration is :
JEE Main 2020 (Online) 6th September Morning Slot
The species that has a spin-only magnetic moment of 5.9 BM, is : (Td = tetrahedral)
JEE Main 2020 (Online) 5th September Evening Slot
Consider the complex ions, trans-[Co(en)2Cl2]+ (A) and cis-[Co(en)2Cl2]+ (B). The correct statement regarding them is :...
JEE Main 2020 (Online) 5th September Morning Slot
The values of the crystal field stabilization energies for a high spin d6 metal ion in octahedral and tetrahedral fields, respectively, are :...
JEE Main 2020 (Online) 4th September Evening Slot
The Crystal Field Stabilization Energy (CFSE) of [CoF3(H2O)3] ($$\Delta $$0 < P) is :
JEE Main 2020 (Online) 4th September Evening Slot
The one that can exhibit highest paramagnetic behaviour among the following is : gly = glycinato; bpy = 2, 2'-bipyridine
JEE Main 2020 (Online) 4th September Evening Slot
The molecule in which hybrid MOs involve only one d-orbital of the central atom is :
JEE Main 2020 (Online) 4th September Morning Slot
The number of isomers possible for [Pt(en)(NO2)2] is :
JEE Main 2020 (Online) 4th September Morning Slot
The pair in which both the species have the same magnetic moment (spin only) is :
JEE Main 2020 (Online) 3rd September Evening Slot
The d-electron configuration of [Ru(en)3 ]Cl2 and [Fe(H2O)6]Cl2 , respectively are :
JEE Main 2020 (Online) 3rd September Evening Slot
Complex A has a composition of H12O6Cl3Cr. If the complex on treatment with conc.H2SO4 loses 13.5% of its original mass, the correct molecular formul...
JEE Main 2020 (Online) 3rd September Morning Slot
The complex that can show optical activity is :
JEE Main 2020 (Online) 3rd September Morning Slot
The electronic spectrum of [Ti(H2O)6]3+ shows a single broad peak with a maximum at 20,300 cm-1 . The crystal field stabilization energy (CFSE) of the...
JEE Main 2020 (Online) 2nd September Evening Slot
Simplified absorption spectra of three complexes ((i), (ii) and (iii)) of Mn+ ion are provided below; their $$\lambda $$max values are marked as A, B ...
JEE Main 2020 (Online) 2nd September Evening Slot
The one that is not expected to show isomerism is :
JEE Main 2020 (Online) 2nd September Morning Slot
For octahedral Mn(II) and tetrahedral Ni(II) complexes, consider the following statements: (I) both the complexes can be high spin. (II) Ni(II) comple...
JEE Main 2020 (Online) 2nd September Morning Slot
Consider that a d6 metal ion (M2+) forms a complex with aqua ligands, and the spin only magnetic moment of the complex is 4.90 BM. The geometry and th...
JEE Main 2020 (Online) 9th January Evening Slot
The correct order of the spin-only magnetic moments of the following complexes is : (I) [Cr(H2O)6]Br2 (II) Na4[Fe(CN)6] (III) Na3[Fe(C2O4)3] ($$\Delta...
JEE Main 2020 (Online) 9th January Evening Slot
The isomer(s) of [Co(NH3)4Cl2] that has/have a Cl–Co–Cl angle of 90°, is/are :
JEE Main 2020 (Online) 9th January Morning Slot
[Pd(F)(Cl)(Br)(I)]2– has n number of geometrical isomers. Then, the spin-only magnetic moment and crystal field stabilisation energy [CFSE] of [Fe(CN)...
JEE Main 2020 (Online) 9th January Morning Slot
Complex X of composition Cr(H2O)6Cln has a spin only magnetic moment of 3.83 BM. It reacts with AgNO3 and shows geometrical isomerism. The IUPAC nomen...
JEE Main 2020 (Online) 8th January Evening Slot
Among (a) – (d) the complexes that can display geometrical isomerism are : (a) [Pt(NH3)3Cl]+ (b) [Pt(NH3)Cl5]– (c) [Pt(NH3)2Cl(NO2)] (d) [Pt(NH3)4Cl...
JEE Main 2020 (Online) 8th January Evening Slot
The correct order of the calculated spin-only magnetic moments of complexs (A) to (D) is: (A) Ni(CO)4 (B) [Ni(H2O)6]Cl2 (C) Na2[Ni(CN)4] (D) PdCl2(PPh...
JEE Main 2020 (Online) 8th January Morning Slot
The complex that can show fac- and mer-isomers is :
JEE Main 2020 (Online) 7th January Evening Slot
The number of possible optical isomers for the complexes MA2B2 with sp3 and dsp2 hydridized metal atom. respectively, is : Note : A and B are unidenta...
JEE Main 2020 (Online) 7th January Evening Slot
Among the statements(a)-(d) the incorrect ones are : (a) Octahedral CO(III) complexes with strong fields ligands have very high magnetic moments. (b) ...
JEE Main 2020 (Online) 7th January Morning Slot
The theory that can completely/properly explain the nature of bonding in [Ni(Co)4] is :
JEE Main 2020 (Online) 7th January Morning Slot
The IUPAC name of complex [Pt(NH3)2Cl(NH2CH3)]Cl is:
JEE Main 2019 (Online) 12th April Evening Slot
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) ...
JEE Main 2019 (Online) 12th April Evening Slot
The compound used in the treatment of lead poisoning is :
JEE Main 2019 (Online) 12th April Morning Slot
The complex ion that will lose its crystal field stabilization energy upon oxidation of its metal to +3 state is : ...
JEE Main 2019 (Online) 12th April Morning Slot
Complete removal of both the axial ligands (along the z-axis) from an octahedral complex leads to which of the following splitting patterns? (relative...
JEE Main 2019 (Online) 10th April Evening Slot
The crystal field stabilization energy (CFSE) of [Fe(H2O)6]Cl2 and K2[NiCl4] respectively, are : ...
JEE Main 2019 (Online) 10th April Morning Slot
The species that can have a trans-isomer is : (en = ehane-1, 2-diamine, ox = oxalate)
JEE Main 2019 (Online) 10th April Morning Slot
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 waveleng...
JEE Main 2019 (Online) 9th April Evening Slot
The maximum possible denticities of a ligand given below towards a common transition and inner-transition metal ion, respectively, are : ...
JEE Main 2019 (Online) 9th April Morning Slot
The degenerate orbitals of [Cr(H2O)6]3+ are :
JEE Main 2019 (Online) 9th April Morning Slot
The one that will show optical activity is : (en = ethane-1,2-diamine)
JEE Main 2019 (Online) 8th April Evening Slot
The compound that inhibits the growth of tumors is :
JEE Main 2019 (Online) 8th April Evening Slot
The calculated spin-only magnetic moments (BM) of the anionic and cationic species of [Fe(H2O)6]2 and [Fe(CN)6], respectively, are :...
JEE Main 2019 (Online) 8th April Morning Slot
The following ligand is : ...
JEE Main 2019 (Online) 8th April Morning Slot
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(NH...
JEE Main 2019 (Online) 12th January Evening Slot
The magnetic moment of an octahedral homoleptic Mn(II) complex is 5.9 BM. The suitable ligand for this complex is -
JEE Main 2019 (Online) 12th January Morning Slot
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 -
JEE Main 2019 (Online) 12th January Morning Slot
The metal d-orbitals that are directly facing the ligands in K3[Co(CN)6] are -
JEE Main 2019 (Online) 12th January Morning Slot
Mn2(CO)10 is an organometallic compound due to the presence of -
JEE Main 2019 (Online) 11th January Evening Slot
The number of bridging CO ligand(s) and Co-Co bond(s) in Co2(CO)8, respectively are :
JEE Main 2019 (Online) 11th January Evening Slot
The coordination number of Th in K4[Th(C2O4)4(OH2)2] is : (C2O$${_4^{2 - }}$$ = Oxalato)...
JEE Main 2019 (Online) 11th January Morning Slot
Match the metals (column I) with the coordination compound(s)/enzyme(s) (column II) .tg {border-collapse:collapse;border-spacing:0;width:100%} .tg ...
JEE Main 2019 (Online) 10th January Evening Slot
A reaction of cobalt (III) chloride and ethylenediamine in a 1 : 2 mole ratio generates two isomeric products A (violet coloured) and B (green coloure...
JEE Main 2019 (Online) 10th January Evening Slot
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 :
JEE Main 2019 (Online) 10th January Morning Slot
The total number of isomers for a square planar complex [M(F)(Cl)(SCN)(NO2)] is
JEE Main 2019 (Online) 9th January Evening Slot
The complex that has highest crystal field splitting energy ($$\Delta $$), is :
JEE Main 2019 (Online) 9th January Evening Slot
Homoleptic octahedral complexes of a metal ion 'M3+' with three monodenate ligands L1, L2 and L3 adsorb wavelenths in the region of green, blue and re...
JEE Main 2019 (Online) 9th January Morning Slot
Two complexes [Cr(H2O)6]Cl3 (A) and [Cr(NH3)6]Cl3 (B) are violet and yellow coloured, respectively. The incorrect statement regarding them i...
JEE Main 2018 (Online) 16th April Morning Slot
In Wilkinson's catalyst, the hybridization of central metal ion and its shape are respectively :
JEE Main 2018 (Online) 16th April Morning Slot
Which of the following complexes will shows geometrical isomerism ?
JEE Main 2018 (Offline)
The oxidation states of Cr in [Cr(H2O)6]Cl3, [Cr(C6H6)2] and K2[Cr(CN)2(O)2(O2)(NH3)] respectively are :...
JEE Main 2018 (Offline)
Consider the following reaction and statements: [Co(NH3)4Br2]+ + Br- $$\to$$ [Co(NH3)3Br3] + NH3 (I) Two isomers are produced if the reactant complex ...
JEE Main 2018 (Online) 15th April Evening Slot
The correct order of spin-only magnetic moments among the following is : (Atomic number : Mn = 25, Co = 27, Ni = 28, Zn = 30)
JEE Main 2018 (Online) 15th April Evening Slot
The total number of possible isomers for square-planar [Pt(Cl)(NO2)(NO3)(SCN)]2- is :
JEE Main 2018 (Online) 15th April Morning Slot
The correct combination is :
JEE Main 2017 (Online) 9th April Morning Slot
[Co2(CO)8] displays :
JEE Main 2017 (Offline)
On treatment of 100 mL of 0.1 M solution of CoCl3. 6H2O with excess AgNO3; 1.2 $$\times$$ 1022 ions are precipitated. The complex is :...
JEE Main 2016 (Online) 10th April Morning Slot
Which of the following is an example of homoleptic complex?
JEE Main 2016 (Online) 9th April Morning Slot
Identify the correct trend given below : (Atomic No.=Ti : 22, Cr : 24 and Mo : 42)
JEE Main 2016 (Online) 9th April Morning Slot
Which one of the following complexes will consume more equivalents of aqueous solution of Ag(NO3)?
JEE Main 2016 (Offline)
Which one of the following complexes shows optical isomerism? (en = ethylenediamine)
JEE Main 2016 (Offline)
The pair having the same magnetic moment is : [At. No.: Cr = 24, Mn = 25, Fe = 26, Co = 27]
JEE Main 2015 (Offline)
Which of the following compounds is not colored yellow?
JEE Main 2015 (Offline)
The number of geometric isomers that can exist for square planar [Pt (Cl) (py) (NH3) (NH2OH)]+ is (py = pyridine) :
JEE Main 2014 (Offline)
The octahedral complex of a metal ion M3+ with four monodentate ligands L1, L2, L3 and L4 absorb wavelengths in the region of red, green, yellow and b...
JEE Main 2014 (Offline)
The equation which is balanced and represents the correct product(s) is :
JEE Main 2013 (Offline)
Which of the following complex species is not expected to exhibit optical isomerism?
AIEEE 2012
Which among the following will be named as dibromidobis (ethylene diamine) chromium(III) bromide?
AIEEE 2011
Which of the following facts about the complex [Cr (NH3)6 ]Cl3 is wrong?
AIEEE 2011
The magnetic moment (spin only) of [NiCl4]2− is
AIEEE 2010
Which one of the following has an optical isomer ? (en = ethylenediamine)
AIEEE 2010
A solution containing 2.675g of CoCl3. 6NH3 (molar mass = 267.5 g mol–1) is passed through a cation exchanger. The chloride ions obtained in solution ...
AIEEE 2009
Which of the following pairs represents linkage isomers ?
AIEEE 2009
Which of the following has an optical isomer ?
AIEEE 2008
In which of the following octahedral complexes of Co (at. no. 27), will the magnitude of $$\Delta _o$$ be the highest?
AIEEE 2008
The coordination number and the oxidation state of the element ‘E’ in the complex [E(en)2(C2O4)]NO2 (where (en) is ethylene diamine) are, respectively...
AIEEE 2007
Which one of the following has a square planar geometry?
AIEEE 2006
Nickel (Z = 28) combines with a uninegative monodentate ligand X– to form a paramagnetic complex [NiX4]2− . The number of unpaired electron(s) in the ...
AIEEE 2006
The IUPAC name for the complex [Co(NO2)(NH3)5]Cl2 is
AIEEE 2006
In Fe(CO)5, the Fe – C bond possesses :
AIEEE 2006
How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca2+ ion?
AIEEE 2005
The IUPAC name of the coordination compound K3[Fe(CN)6] is
AIEEE 2005
The oxidation state of Cr in [Cr(NH3)4Cl2]+ is :
AIEEE 2005
Which of the following compounds shows optical isomerism?
AIEEE 2005
The value of the ‘spin only’ magnetic moment for one of the following configurations is 2.84 BM. The correct one is :
AIEEE 2005
Which one of the following cyano complexes would exhibit the lowest value of paramagnetic behaviour? (At. No. Cr = 24, Mn = 25, Fe = 26, Co = 27) ...
AIEEE 2004
Which one of the following complexes in an outer orbital complex?
AIEEE 2004
Coordination compound have great importance in biological systems. In this context which of the following statements is incorrect?
AIEEE 2004
Which one the following has largest number of isomers? (R = alkyl group, en = ethylenediamine)
AIEEE 2004
The coordination number of central metal atom in a complex is determined by :
AIEEE 2004
The correct order of magnetic moments (spin only values in B.M.) among is : (Atomic numbers: Mn = 25; Fe = 26, Co =27)
AIEEE 2004
Among the properties (a) reducing (b) oxidising (c) complexing, the set of properties shown by CN– ion towards metal species is :
AIEEE 2003
Ammonia forms the complex ion [Cu(NH3)4]2+ with copper ions in alkaline solutions but not in acidic solutions. What is the reason for it? ...
AIEEE 2003
One mole of the complex compound Co(NH3)5Cl3, gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with two moles of AgN...
AIEEE 2003
In the coordination compound, K4[Ni(CN)4], the oxidation state of nickel is :
AIEEE 2002
The most stable ion is :
AIEEE 2002
CH3 - Mg - Br is an organometallic compound due to :
AIEEE 2002
The type isomerism present in nitropentammine chromium $$\left( {{\rm I}{\rm I}{\rm I}} \right)$$ chloride is :

Numerical

JEE Main 2024 (Online) 5th April Morning Shift
The spin-only magnetic moment value of the ion among $$\mathrm{Ti}^{2+}, \mathrm{V}^{2+}, \mathrm{Co}^{3+}$$ and $$\mathrm{Cr}^{2+}$$, that acts as st...
JEE Main 2024 (Online) 9th April Evening Shift
Consider the following test for a group-IV cation. $$\mathrm{M}^{2+}+\mathrm{H}_2 \mathrm{S} \rightarrow \mathrm{A} \text { (Black precipitate)+ bypro...
JEE Main 2024 (Online) 9th April Morning Shift
Number of ambidentate ligands among the following is _________. $$\mathrm{NO}_2^{-}, \mathrm{SCN}^{-}, \mathrm{C}_2 \mathrm{O}_4^{2-}, \mathrm{NH}_3, ...
JEE Main 2024 (Online) 8th April Evening Shift
Total number of unpaired electrons in the complex ions $$[\mathrm{Co}(\mathrm{NH}_3)_6]^{3+}$$ and $$[\mathrm{NiCl}_4]^{2-}$$ is ________.
JEE Main 2024 (Online) 8th April Morning Shift
The 'spin only' magnetic moment value of $$\mathrm{MO}_4{ }^{2-}$$ is ________ BM. (Where M is a metal having least metallic radii. among $$\mathrm{Sc...
JEE Main 2024 (Online) 31st January Morning Shift
The 'Spin only' Magnetic moment for $$\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}$$ is _________ $$\times 10^{-1} \mathrm{~BM}$$. (given...
JEE Main 2024 (Online) 30th January Evening Shift
Number of complexes which show optical isomerism among the following is ________. $$\text { cis- }\left[\mathrm{Cr}(\mathrm{ox})_2 \mathrm{Cl}_2\right...
JEE Main 2024 (Online) 27th January Evening Shift
The Spin only magnetic moment value of square planar complex $$\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}\left(\mathrm{NH}_2 \mathrm{CH...
JEE Main 2023 (Online) 15th April Morning Shift
The homoleptic and octahedral complex of $\mathrm{Co}^{2+}$ and $\mathrm{H}_{2} \mathrm{O}$ has ___________ unpaired electron(s) in the $t_{2\mathrm{g...
JEE Main 2023 (Online) 11th April Morning Shift
The ratio of spin-only magnetic moment values $$\mu_{\text {eff }}\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]^{3-} / \mu_{\text {eff }}\left[\mathrm{Cr}...
JEE Main 2023 (Online) 10th April Evening Shift
For a metal ion, the calculated magnetic moment is $$4.90 ~\mathrm{BM}$$. This metal ion has ___________ number of unpaired electrons.
JEE Main 2023 (Online) 10th April Morning Shift
In potassium ferrocyanide, there are ________ pairs of electrons in the $$t_{2g}$$ set of orbitals.
JEE Main 2023 (Online) 8th April Evening Shift
The observed magnetic moment of the complex $$\left.\left[\operatorname{Mn}(\underline{N} C S)_{6}\right)\right]^{x^{-}}$$ is $$6.06 ~\mathrm{BM}$$. T...
JEE Main 2023 (Online) 6th April Morning Shift
Number of ambidentate ligands in a representative metal complex $$\left[\mathrm{M}(\mathrm{en})(\mathrm{SCN})_{4}\right]$$ is ___________. [en = ethyl...
JEE Main 2023 (Online) 1st February Evening Shift
The spin only magnetic moment of $$\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$$ complexes is _________ B.M. (Nearest inte...
JEE Main 2023 (Online) 31st January Evening Shift
If the CFSE of $\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}$ is $-96.0 \mathrm{~kJ} / \mathrm{mol}$, this complex will abs...
JEE Main 2023 (Online) 29th January Morning Shift
The sum of bridging carbonyls in $$\mathrm{W(CO)_6}$$ and $$\mathrm{Mn_2(CO)_{10}}$$ is ____________.
JEE Main 2023 (Online) 25th January Evening Shift
Total number of moles of AgCl precipitated on addition of excess of AgNO$$_3$$ to one mole each of the following complexes $$\mathrm{[Co(NH_3)_4Cl_2]C...
JEE Main 2023 (Online) 25th January Morning Shift
The number of paramagnetic species from the following is _____________. $$\mathrm{{[Ni{(CN)_4}]^{2 - }},[Ni{(CO)_4}],{[NiC{l_4}]^{2 - }}}$$ $$\mathrm{...
JEE Main 2023 (Online) 24th January Morning Shift
The d-electronic configuration of $$\mathrm{[CoCl_4]^{2-}}$$ in tetrahedral crystal field in $${e^mt_2^n}$$. Sum of "m" and "number of unpaired electr...
JEE Main 2022 (Online) 29th July Evening Shift
Sum of oxidation state (magnitude) and coordination number of cobalt in $$\mathrm{Na}\left[\mathrm{Co}(\mathrm{bpy}) \mathrm{Cl}_{4}\right]$$ is _____...
JEE Main 2022 (Online) 29th July Morning Shift
$$\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$$ should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabili...
JEE Main 2022 (Online) 28th July Morning Shift
Total number of relatively more stable isomer(s) possible for octahedral complex $$\left[\mathrm{Cu}(\mathrm{en})_{2}(\mathrm{SCN})_{2}\right]$$ will ...
JEE Main 2022 (Online) 27th July Morning Shift
The conductivity of a solution of complex with formula $$\mathrm{CoCl}_{3}\left(\mathrm{NH}_{3}\right)_{4}$$ corresponds to 1 : 1 electrolyte, then th...
JEE Main 2022 (Online) 26th July Morning Shift
The difference between spin only magnetic moment values of $$\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]\mathrm{Cl}_{2}$$ and $...
JEE Main 2022 (Online) 25th July Morning Shift
Consider the following metal complexes : $$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$$ $$\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\...
JEE Main 2022 (Online) 30th June Morning Shift
In the following brown complex, the oxidation state of iron is +_____________. $${[Fe{({H_2}O)_6}]^{2 + }} + NO \to \mathop {{{[Fe{{({H_2}O)}_5}(NO)]}...
JEE Main 2022 (Online) 30th June Morning Shift
Spin only magnetic moment ($$\mu$$s) of $${K_3}[Fe{(CN)_6}]$$ is ____________ B.M. (Nearest integer)
JEE Main 2022 (Online) 28th June Evening Shift
$${[Fe{(CN)_6}]^{4 - }}$$ $${[Fe{(CN)_6}]^{3 - }}$$ $${[Ti{(CN)_6}]^{3 - }}$$ $${[Ni{(CN)_4}]^{2 - }}$$ $${[Co{(CN)_6}]^{3 - }}$$ Among the given comp...
JEE Main 2022 (Online) 28th June Evening Shift
(a) CoCl3.4NH3,    (b) CoCl3.5NH3,      (c) CoCl3.6NH3    and    (d) CoCl(NO3)2....
JEE Main 2022 (Online) 28th June Morning Shift
Number of complexes which will exhibit synergic bonding amongst, $$[Cr{(CO)_6}]$$, $$[Mn{(CO)_5}]$$ and $$[M{n_2}{(CO)_{10}}]$$ is ___________.
JEE Main 2022 (Online) 27th June Morning Shift
Acidified potassium permanganate solution oxidises oxalic acid. The spin-only magnetic moment of the manganese product formed from the above reaction ...
JEE Main 2022 (Online) 26th June Evening Shift
Reaction of [Co(H2O)6]2+ with excess ammonia and in the presence of oxygen results into a diamagnetic product. Number of electrons present in t2g-orbi...
JEE Main 2022 (Online) 26th June Morning Shift
The spin-only magnetic moment value of an octahedral complex among CoCl3.4NH3, NiCl2.6H2O and PtCl4.2HCl, which upon reaction with excess of AgNO3 giv...
JEE Main 2022 (Online) 25th June Evening Shift
Amongst FeCl3.3H2O, K3[Fe(CN)6] and [Co(NH3)6]Cl3, the spin-only magnetic moment value of the inner-orbital complex that absorbs light at shortest wav...
JEE Main 2022 (Online) 25th June Morning Shift
If [Cu(H2O)4]2+ absorbs a light of wavelength 600 nm for d-d transition, then the value of octahedral crystal field splitting energy for [Cu(H2O)6]2+ ...
JEE Main 2022 (Online) 24th June Morning Shift
In the cobalt-carbonyl complex : [Co2(CO)8], number of Co-Co bonds is "X" and terminal CO ligands is "Y". X + Y = ___________....
JEE Main 2021 (Online) 1st September Evening Shift
The sum of oxidation states of two silver ions in [Ag(NH3)2] [Ag(CN)2] complex is _____________.
JEE Main 2021 (Online) 27th August Evening Shift
The number of optical isomers possible for [Cr(C2O4)3]3$$-$$ is ____________.
JEE Main 2021 (Online) 27th August Morning Shift
1 mol of an octahedral metal complex with formula MCl3 . 2L on reaction with excess of AgNO3 gives 1 mol of AgCl. The denticity of Ligand L is _______...
JEE Main 2021 (Online) 26th August Evening Shift
The overall stability constant of the complex ion [Cu(NH3)4]2+ is 2.1 $$\times$$ 1013. The overall dissociations constant is y $$\times$$ 10$$-$$14. T...
JEE Main 2021 (Online) 26th August Morning Shift
The ratio of number of water molecules in Mohr's salt and potash alum is ____________ $$\times$$ 10$$-$$1. (Integer answer)
JEE Main 2021 (Online) 27th July Evening Shift
3 moles of metal complex with formula Co(en)2Cl3 gives 3 moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of...
JEE Main 2021 (Online) 27th July Morning Shift
The number of geometrical isomers possible in triamminetrinitrocobalt (III) is X and in trioxalatochromate (III) is Y. Then the value of X + Y is ____...
JEE Main 2021 (Online) 25th July Morning Shift
Three moles of AgCl get precipitated when one mole of an octahedral co-ordination compound with empirical formula CrCl3.3NH3.3H2O reacts with excess o...
JEE Main 2021 (Online) 22th July Evening Shift
The total number of unpaired electrons present in [Co(NH3)6]Cl2 and [Co(NH3)6]Cl3 is :...
JEE Main 2021 (Online) 20th July Evening Shift
An aqueous solution of NiCl2 was heated with excess sodium cyanide in presence of strong oxidizing agent to form [Ni(CN)6]2$$-$$. The total change in ...
JEE Main 2021 (Online) 20th July Morning Shift
The spin-only magnetic moment value for the complex [Co(CN)6]4$$-$$ is __________ BM.[At. no. of Co = 27]
JEE Main 2021 (Online) 18th March Morning Shift
The total number of unpaired electrons present in the complex K3[Cr(oxalate)3] is _____________.
JEE Main 2021 (Online) 17th March Evening Shift
On complete reaction of FeCl3 with oxalic acid in aqueous solution containing KOH, resulted in the formation of product A. The secondary valency of Fe...
JEE Main 2021 (Online) 16th March Evening Shift
[Ti(H2O)6]3+ absorbs light of wavelength 498 nm during a d $$-$$ d transition. The octahedral splitting energy for the above complex is ____________ $...
JEE Main 2021 (Online) 16th March Morning Shift
The equivalents of ethylene diamine required to replace the neutral ligands from the coordination sphere of the trans-complex of CoCl3 . 4NH3 is _____...
JEE Main 2021 (Online) 26th February Evening Shift
The number of stereoisomers possible for [Co(ox)2(Br)(NH3)]2$$-$$ is ___________. [ox = oxalate]
JEE Main 2021 (Online) 26th February Morning Shift
Number of bridging CO ligands in [Mn2(CO)10] is __________.
JEE Main 2021 (Online) 25th February Evening Shift
The spin only magnetic moment of a divalent ion in aqueous solution (atomic number 29) is _________ BM.
JEE Main 2020 (Online) 5th September Evening Slot
Considering that $$\Delta $$0 > P, the magnetic moment (in BM) of [Ru(H2O)6]2+ would be _________.
JEE Main 2020 (Online) 5th September Morning Slot
The total number of coordination sites in ethylenediaminetetraacetate (EDTA4–) is _____.
JEE Main 2020 (Online) 2nd September Morning Slot
The oxidation states of iron atoms in compounds (A), (B) and (C), respectively, are x, y and z. The sum of x, y and z is ________. Na4[Fe(CN)5(NOS)] &...
JEE Main 2020 (Online) 8th January Evening Slot
Complexes (ML5) of metals Ni and Fe have ideal square pyramidal and trigonal bipyramidal grometries, respectively. The sum of the 90°, 120° and 180° L...
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