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JEE Coordination Compounds PYQs with Solutions

715 previous year questions from Coordination Compounds (JEE Main & Advanced Chemistry) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

715 questionsChemistry2006–2026Answers + solutions

About Coordination Compounds PYQs

Coordination Compounds has 715 previous year questions in the Quantrex Academy JEE Main & Advanced Chemistry bank. The 220 questions in this list come from JEE Main (167) and JEE Advanced (53), spanning 2006 to 2026. Each question opens on its own page with the options, the correct answer and the worked solution where available.

Questions by year (this list)

  • 2026: 36
  • 2025: 41
  • 2024: 45
  • 2023: 55
  • 2022: 2
  • 2021: 3
  • 2020: 1
  • 2019: 1
  • 2018: 3
  • 2017: 1
  • 2016: 3
  • 2015: 3

Coordination Compounds questions with solutions

1

Reaction of PtF_6 with oxygen ( O_2 ) gas results in the formation of an ionic compound, X^+Y^- . Correct statement(s) is(are)

JEE Advanced 2026 Solution View → 2

The total number of all possible isomers for the square planar complex with formula K[M(NCS)(NO_2)(gly)] is ____. ( M = metal ion and gly = NH_2CH_2COO^- )

JEE Advanced 2026 Solution View → 3

Consider that the coordinating atoms of the ligands in cis -[Co(NH _3 ) _4 Cl _2 ]Cl and mer -[Co(NH _3 ) _3 Cl _3 ] octahedral complexes are at the vertices of an octahedron. The

JEE Advanced 2026 Solution View → 4

Number of paramagnetic complexes among the following is ________. [MnBr_4]^ 2- , [NiCl_4]^ 2- , [Ni(CN)_4]^ 2- , [Ni(CO)_4] , [CoF_6]^ 3- , [Fe(CN)_6]^ 4- , [Mn(CN)_6]^ 3

JEE Main 2026 Solution View → 5

Which of the following sequences of hybridisation, geometry and magnetic nature are correct for the given coordination compounds ? A. [NiCl_4]^ 2- - sp ^3 , tetrahedral

JEE Main 2026 Solution View → 6

An excess of AgNO _3 is added to 100 mL of a 0.05 M solution of tetraaquadichloridochromium (III) chloride. The number of moles of AgCl precipitated will be __________ × 10^ -3 .

JEE Main 2026 Solution View → 7

Match the LIST-I with LIST-II List-I Electronic configuration of tetrahedral metal ion List-II Crystal Field Stabilization Energy ( Δ_t ) A. d^2 I. -0.6 B. d^4 II. -0.8 C. d^6

JEE Main 2026 Solution View → 8

Which of the following are true about the energy of the given d-orbitals of a tetrahedral complex? A. d_ xy = d_ xz > d_ x^2-y^2 B. d_ xy = d_ yz > d_ z^2 C. d_ x^2-y^2 > d_ z^2 >

JEE Main 2026 Solution View → 9

Identify the correct statements from the following A. [Fe(C_2O_4)_3]^ 3- is the most stable complex among [Fe(OH)_6]^ 3- , [Fe(C_2O_4)_3]^ 3- and [Fe(SCN)_6]^ 3- B. The stability

JEE Main 2026 Solution View → 10

The total number of unpaired electrons present in the d^3 , d^4 (low spin), d^5 (high spin), d^6 (high spin) and d^7 (low spin) octahedral complex systems is _______.

JEE Main 2026 Solution View → 11

The correct statements about metal carbonyls are A. The metal-carbon bonds in metal carbonyls possess both σ and π -character. B. Due to synergic bonding interactions between

JEE Main 2026 Solution View → 12

Given below are two statements: Statement I: Each electron in e_g orbitals destabilizes the orbitals by +0.6Δ_o and each electron in the t_ 2g orbitals stabilizes the orbitals by

JEE Main 2026 Solution View → 13

Consider the metal complexes [Ni(en)_3]^ 2+ (A), [NiCl_4]^ 2- (B) and [Ni(NH_3)_6]^ 2+ (C). Choose the CORRECT option by considering the number of unpaired electrons present in

JEE Main 2026 Solution View → 14

Match the LIST-I with LIST-II List-I Complex ion List-II Calculated spin only magnetic moment (BM) A. [Cr(H_2O)_6]^ 2+ I. 3.87 B. [Co(H_2O)_6]^ 2+ II. 5.92 C. [Cu(H_2O)_6]^ 2+

JEE Main 2026 Solution View → 15

Which of the following complexes will show coordination isomerism? A. [Ag(NH_3)_2][Ag(CN)_2] B. [Co(NH_3)_6][Cr(CN)_6] C. [Co(NH_3)_6][Co(CN)_6] D. [Fe(NH_3)_6][Co(CN)_6] E.

JEE Main 2026 Solution View → 16

Match List - I with List - II. List - I Chromium (III) Complexes (en = ethylene diamine) List - II Δ_0 (cm ^ -1 ) A. [Cr(CN)_6]^ 3- I. 15,060 B. [CrF_6]^ 3- II. 17,400 C.

JEE Main 2026 Solution View → 17

5.33 g of CrCl_3 · 6H_2O , 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

JEE Main 2026 Solution View → 18

The correct increasing order of spin-only magnetic moment values of the complex ions [MnBr_ 4 ]^ 2- (A),[Cu(H_ 2 O)_ 6 ]^ 2+ (B),[Ni(CN)_ 4 ]^ 2- (C) and [Ni(H_ 2 O)_ 6 ]^ 2+ (D)

JEE Main 2026 Solution View → 19

The number of isoelectronic species among Sc^ 3+ , Cr^ 2+ , Mn^ 3+ , Co^ 3+ and Fe^ 3+ is ' n^ . If ' n^ moles of AgCl is formed during the reaction of complex with formula CoCl_

JEE Main 2026 Solution View → 20

The correct statement among the following is:

JEE Main 2026 Solution View → 21

X is the number of geometrical isomers exhibited by [Pt(NH_ 3 )(H_ 2 O) BrCl] . Y is the number of optically inactive isomer(s) exhibited by [CrCl_ 2 (ox)_ 2 ]^ 3- Z is the number

JEE Main 2026 Solution View → 22

The wavelength of light absorbed for the following complexes are in the order \( (I) [Co(NH _ 3 )_6]^ 3+ ; (II) [Co(H _ 2 O)_ 6]^ 3+ ; (III) [Co(CN)_ 6]^ 3- ; (IV) [Co(NH _ 3

JEE Main 2026 Solution View → 23

A chromium complex with a formula CrCl_ 3 · 6 H_ 2 O has a spin only magnetic moment value of 3.87 BM and its solution conductivity corresponds to 1: 2 electrolyte. 2.75 g of the

JEE Main 2026 Solution View → 24

Given below are two statements: Statement I : Hybridisation, shape and spin only magnetic moment of K_ 3 [Co(CO_ 3 )_ 3 ] is sp^ 3 ~d^ 2 , octahedral and 4.9 BM respectively.

JEE Main 2026 Solution View → 25

Given below are two statements: Statement I : The number of paramagnetic species among [CoF_ 6 ]^ 3- ,[TiF_ 6 ]^ 3- , V_ 2 O_ 5 and [Fe(CN)_ 6 ]^ 3- is 3. Statement II : K_ 4

JEE Main 2026 Solution View → 26

Consider a mixture ' X ' which is made by dissolving 0.4 mol of [Co(NH_ 3 )_ 5 SO_ 4 ] Br and 0.4 mol of [Co(NH_ 3 )_ 5 Br] SO_ 4 in water to make 4 L of solution. When 2 L of

JEE Main 2026 Solution View → 27

Identify the CORRECT set of details from the following: A. [Co(NH_ 3 )_ 6 ]^ 3+ : Inner orbital complex; d^ 2 sp^ 3 hybridized B. [MnCl_ 6 ]^ 3- : Outer orbital complex; sp^ 3 ~d^

JEE Main 2026 Solution View → 28

Total number of unpaired electrons present in the central metal atoms/ions of [Ni(CO)_ 4 ],[NiCl_ 4 ]^ 2- ,[PtCl_ 2 (NH_ 3 )_ 2 ],[Ni(CN)_ 4 ]^ 2- and [Pt(CN)_ 4 ]^ 2- is \_\_\_\_

JEE Main 2026 Solution View → 29

Given below are two statements : Statement I : [CoBr_ 4 ]^ 2- ion will absorb light of lower energy than [CoCl_ 4 ]^ 2- ion. Statement II : In [CoI_ 4 ]^ 2- ion, the energy

JEE Main 2026 Solution View → 30

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

JEE Main 2026 Solution View → 31

The crystal field splitting energy of [Co( oxalate )_ 3 ]^ 3- complex is ' n^ times that of the [Cr( oxalate )_ 3 ]^ 3- complex. Here ' n^ is \_\_\_\_ . (Assume Δ_ 0 P )

JEE Main 2026 Solution View → 32

[Ni(PPh_ 3 )_ 2 Cl_ 2 ] is a paramagnetic complex. Identify the INCORRECT statements about this complex. A. The complex exhibits geometrical isomerism. B. The complex is white in

JEE Main 2026 Solution View → 33

Consider the transition metal ions Mn^ 3+ , Cr^ 3+ , Fe^ 3+ and Co^ 3+ and all form low spin octahedral complexes. The correct decreasing order of unpaired electrons in their

JEE Main 2026 Solution View → 34

Given below are two statements : Statement I : Crystal Field Stabilization Energy (CFSE) of [Cr(H_ 2 O)_ 6 ]^ 2+ is greater than that of [Mn(H_ 2 O)_ 6 ]^ 2+ . Statement II

JEE Main 2026 Solution View → 35

Identify the metal ions among Co^ 2+ , Ni^ 2+ , Fe^ 2+ , V^ 3+ and Ti^ 2+ having a spin-only magnetic moment value more than 3.0 BM. The sum of unpaired electrons present in the

JEE Main 2026 Solution View → 36

Given below are two statements : Statement I : Among .[Cu(NH_ 3 )_ 4 ]^ 2+ ,[Ni(en)_ 3 )]^ 2+ ,[Ni(NH_ 3 )_ 6 ]^ 2+ and [Mn(H_ 2 O)_ 6 ]^ 2+ , [Mn(H_ 2 O)_ 6 ]^ 2+ has the maximum

JEE Main 2026 Solution View → 37

The correct order of the wavelength maxima of the absorption band in the ultraviolet-visible region for the given complexes is

JEE Advanced 2025 Solution View → 38

The sum of the spin only magnetic moment values (in B.M.) of [Mn(Br)_6]^ 3- and [Mn(CN)_6]^ 3- is _____.

JEE Advanced 2025 Solution View → 39

Given below are two statements : Statement I : A homolepitc octahedral complex, formed using monodentate ligands, will not show stereoisomerism. Statement II : cis- and trans

JEE Main 2025 Solution View → 40

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. [

JEE Main 2025 Solution View → 41

Match List-I with List-II Choose the correct answer from the options given below :

JEE Main 2025 Solution View → 42

The number of unpaired electrons responsible for the paramagnetic nature of the following complex species are respectively: [Fe(CN)_6]^ 3- ,[FeF_6]^ 3- ,[CoF_6]^ 3- ,[Mn(CN)_6]^ 3-

JEE Main 2025 Solution View → 43

The number of paramagnetic metal complex species among [Co(NH_3)_6]^ 3+ , [Co(C_2 O_4)_3]^ 3- , [MnCl_6]^ 3- ,[Mn(CN)_6]^ 3- ,[CoF_6]^ 3- ,[Fe(CN)_6]^ 3^ 3- and [FeF_6]^ 3- with

JEE Main 2025 Solution View → 44

An octahedral complex having molecular composition Co. 5 NH_3. Cl. SO_4 has two isomers A and B. The solution of A gives a white precipitate with AgNO_3 solution and the solution

JEE Main 2025 Solution View → 45

The number of paramagnetic complex among [FeF_6]^ 3- ,[Fe(CN)_6]^ 3- ,[Mn(CN)_6]^ 3- ,[Co(C_2 O_4)_3]^ 3- , [MnCl_6]^ 3- and [CoF_6]^ 3- , which involved d^2 sp^3 hybridization is

JEE Main 2025 Solution View → 46

The correct order of [FeF_6]^ 3- ,[CoF_6]^ 3- ,[Ni(CO)_4] and [Ni(CN)_4]^ 2- complex species based on the number of unpaired electrons present is :

JEE Main 2025 Solution View → 47

' X ' is the number of electrons in t_ 2 g orbitals of the most stable complex ion among [Fe(NH_3)_6]^ 3+ , [Fe(Cl_6)]^ 3- ,[Fe(C_2 O_4)_3]^ 3- and [Fe(H_2 O)_6]^ 3+ . The nature

JEE Main 2025 Solution View → 48

Number of stereoisomers possible for the complexes, [CrCl_3(py)_3] and [CrCl_2(ox)_2]^ 3- are respectively ( py= pyridine, ox= oxalate)

JEE Main 2025 Solution View → 49

Which one of the following complexes will have Δ_0=0 and μ=5.96 B.M.?

JEE Main 2025 Solution View → 50

Identify the diamagnetic octahedral complex ions from below ; A. [Mn(CN)_6]^ 3- B. [Co(NH_3)_6]^ 3+ C. [Fe(CN)_6]^ 4- D. [Co(H_2 O)_3 ~F_3] Choose the correct answer from the

JEE Main 2025 Solution View → 51

The number of optical isomers exhibited by the iron complex (A) obtained from the following reaction is ________ FeCl_3+KOH+H_2 C_2 O_4 arrow ~A

JEE Main 2025 Solution View → 52

Match the LIST-I with LIST-II Choose the correct answer from the options given below :

JEE Main 2025 Solution View → 53

The correct order of the complexes [Co(NH_3)_5(H_2 O)]^ 3+ (A), [Co(NH_3)_6]^ 3+ (B), [Co(CN)_6]^ 3- (C) and [CoCl(NH_3)_5]^ 2+ (D) in terms wavelength of light absorbed is :

JEE Main 2025 Solution View → 54

The d-orbital electronic configuration of the complex among [Co(en)_3]^ 3+ , [CoF_6]^ 3- , [Mn(H_2 O)_6]^ 2+ and [Zn(H_2 O)_6]^ 2+ that has the highest CFSE is :

JEE Main 2025 Solution View → 55

The type of hybridization and the magnetic property of [MnCl_6]^ 3- are :

JEE Main 2025 Solution View → 56

The spin-only magnetic moment value of M^ n+- ion formed among Ni, Zn Mn and Cu that has the least enthalpy of atomisation is ________. (in nearest integer) Here n is equal to the

JEE Main 2025 Solution View → 57

Given below are two statements : Statement (I) : In octahedral complexes, when \(Δ_ o P\) high spin complexes are formed. When \(Δ_ o P\) low spin complexes are formed. Statement

JEE Main 2025 Solution View → 58

A transition metal \(( M) among \( Mn, Cr, Co and Fe has the highest standard electrode potential \( (M^ 3+ / M^ 2+ )\). It forms a metal complex of the type \([M(CN)_ 6]^ 4- \).

JEE Main 2025 Solution View → 59

Identify the homoleptic complexes with odd number of d electrons in the central metal : (A) [FeO_4]^ 2- (B) [Fe(CN)_6]^ 3- (C) [Fe(CN)_5 NO]^ 2- (D) [CoCl_4]^ 2- (E) [Co(H_2 O)_3

JEE Main 2025 Solution View → 60

Consider the following low-spin complexes K_3[Co(NO_2)_6], K_4[Fe(CN)_6] , K_3[Fe(CN)_6], Cu u_2[Fe(CN)_6] and Zn_2[Fe(CN)_6] The sum of the spin-only magnetic moment values of

JEE Main 2025 Solution View → 61

Match List - I with List - II. \( array ll & - I & & - II & (Complex) & & (Hybridisation & Magnetic characters) (A) & [MnBr_4]^ 2- & (I) & d^2 s^3 & diamagnetic (B) & [FeF_6]^ 3

JEE Main 2025 Solution View → 62

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

JEE Main 2025 Solution View → 63

Match List - I with List - II. Choose the correct answer from the options given below :

JEE Main 2025 Solution View → 64

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

JEE Main 2025 Solution View → 65

Match List - I with List - II. Choose the correct answer from the options given below :

JEE Main 2025 Solution View → 66

When Ethane-1,2-diamine is added progressively to an aqueous solution of Nickel (II) chloride, the sequence of colour change observed will be :

JEE Main 2025 Solution View → 67

The conditions and consequence that favours the t_ 2 g ^3 e_g^1 configuration in a metal complex are

JEE Main 2025 Solution View → 68

One mole of the octahedral complex compound Co(NH_3)_5 Cl_3 gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with excess of AgNO_3 solution to

JEE Main 2025 Solution View → 69

Identify the coordination complexes in which the central metal ion has d^4 configuration. Choose the correct answer from the options given below :

JEE Main 2025 Solution View → 70

The complex that shows Facial - Meridional isomerism is:

JEE Main 2025 Solution View → 71

CrCl_3 · xNH_3 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

JEE Main 2025 Solution View → 72

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

JEE Main 2025 Solution View → 73

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

JEE Main 2025 Solution View → 74

Identify the homoleptic complex(es) that is/are low spin. (A) [Fe(CN)_5 NO]^ 2- (B) [CoF_6]^ 3- (C) [Fe(CN)_6]^ 4- (D) [Co(NH_3)_6]^ 3+ (E) [Cr(H_2 O)_6]^ 2+ Choose the correct

JEE Main 2025 Solution View → 75

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

JEE Main 2025 Solution View → 76

In which of the following complexes the CFSE, Δ_ o will be equal to zero?

JEE Main 2025 Solution View → 77

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

JEE Main 2025 Solution View → 78

Among [Co(CN)_4]^ 4- ,[Co(CO)_3(NO)], XeF_4,[PCl_4]^ + ,[PdCl_4]^ 2- ,[ICl_4]^ - ,[Cu(CN)_4]^ 3- and P_4 the total number of species with tetrahedral geometry is _______

JEE Advanced 2024 Solution View → 79

Among the following options, select the option in which each complex in Set-I shows geometrical isomerism and the two complexes in Set-II are ionization isomers of each other. [en

JEE Advanced 2024 Solution View → 80

Among V(CO)_6, Cr(CO)_5, Cu(CO)_3, Mn(CO)_5, Fe(CO)_5,[Co(CO)_3]^ 3- ,[Cr(CO)_4]^ 4- , and Ir(CO)_3 , the total number of species isoelectronic with Ni(CO)_4 is ________. [Given

JEE Advanced 2024 Solution View → 81

Among the following complexes, the total number of diamagnetic species is_____ [Mn(NH_3)_6]^ 3+ ,[MnCl_6]^ 3- ,[FeF_6]^ 3- ,[CoF_6]^ 3- ,[Fe(NH_3)_6]^ 3+ , and [Co(en)_3]^ 3+

JEE Advanced 2024 Solution View → 82

Match List I with List II \( List - I List - II A. K_2 [ Ni(CN)_4] I. sp^3 B. [ Ni(CO)_4] II. sp^3 d² C. [ Co(NH_3)_6] Cl_3 III. dsp^2 D. Na_3 [ CoF_6] IV. d^2 sp^3 \) Choose the

JEE Main 2024 Solution View → 83

The coordination environment of \(Ca^ 2+ \) ion in its complex with \(EDTA^ 4- \) is :

JEE Main 2024 Solution View → 84

The \(F^ - \)ions make the enamel on teeth much harder by converting hydroxyapatite (the enamel on the surface of teeth) into much harder fluoroapatite having the formula.

JEE Main 2024 Solution View → 85

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

JEE Main 2024 Solution View → 86

Number of ambidentate ligands among the following is ______ \( NO _ 2 ^ - , SCN^ - , C _ 2 O _ 4 ^ 2- , NH _ 3 , CN^ - , SO _ 4 ^ 2- , H _ 2 O \).

JEE Main 2024 Solution View → 87

Match List - I with List - II. \( List - I (Complex ion) List - II (Spin only magnetic moment in B.M.) (A) [ Cr(NH_3)_6]^ 3+ (I) 4.90 (B) [ NiCl_4]^ 2- (II) 3.87 (C) [ CoF_6]^ 3

JEE Main 2024 Solution View → 88

Total number of unpaired electrons in the complex ions \([Co(NH_3)_6]^ 3+ \) and \([NiCl_4]^ 2- \) is \( \)

JEE Main 2024 Solution View → 89

Number of Complexes with even number of electrons in \(t_ 2 g \) orbitals is - \( [Fe(H _ 2 O) _6]^ 2+ ,[Co(H _ 2 O)_ 6]^ 2+ , [Co(H _ 2 O) _6]^ 3+ ,[Cu(H _ 2 O)_ 6]^ 2+ ,[Cr(H _

JEE Main 2024 Solution View → 90

An octahedral complex with the formula \(CoCl_3 · nNH_3\) upon reaction with excess of \(AgNO_3\) solution gives 2 moles of \(AgCl\). Consider the oxidation state of \(Co\) in the

JEE Main 2024 Solution View → 91

The correct IUPAC name of \([PtBr_2(PMe_3)_2]\) is :

JEE Main 2024 Solution View → 92

Given below are two statements : Statement I : \( PF _ 5 \) and \( BrF _ 5 \) both exhibit \( sp^ 3 ~d \) hybridisation. Statement II : Both \( SF _ 6 \) and \([Co(NH _ 3 )_6]^ 3+

JEE Main 2024 Solution View → 93

Match List - I with List - II. \( List - I List - II Reaction Type of redox reaction (A) TiCl_4 (I) e², t_2^0 (B) [ FeO_4]^ 2- (II) e⁴, t_2^3 (C) [ FeCl_4]^ - (III) e⁰, t_2^0 (D)

JEE Main 2024 Solution View → 94

Match List I with List II \( List - I List - II (Compound) (Uses) A. Iodoform I. Fire extinguisher B. Carbon tetrachloride II. Insecticide C. CFC III. Antiseptic D. DDT IV.

JEE Main 2024 Solution View → 95

he following complexes \( (A) [CoCl(NH_ 3 )_5]^ 2+ , (B) [Co(CN)_6]^ 3- , (C) [Co(NH_ 3 )_5 (H_ 2 O)]^ 3+ , (D) [Cu(H_ 2 O)_ 4]^ 2+ \) The correct order of A, B, C and D in terms

JEE Main 2024 Solution View → 96

The number of complexes from the following with no electrons in the \(t_2\) orbital is \( \) \(TiCl_4,[MnO_4]^ - ,[FeO_4]^ 2- ,[FeCl_4]^ - ,[CoCl_4]^ 2- \)

JEE Main 2024 Solution View → 97

The metal atom present in the complex MABXL (where A, B, X and L are unidentate ligands and \(M\) is metal) involves \(sp^3\) hybridization. The number of geometrical isomers

JEE Main 2024 Solution View → 98

Which one of the following complexes will exhibit the least paramagnetic behaviour? [Atomic number, \( Cr= 24, Mn= 25, Fe= 26, Co= 27\) ]

JEE Main 2024 Solution View → 99

The correct order of ligands arranged in increasing field strength.

JEE Main 2024 Solution View → 100

If an iron (III) complex with the formula \([Fe(NH_3)_x(CN)_y]^ - \)has no electron in its \(e_g\) orbital, then the value of \(x+y\) is

JEE Main 2024 Solution View → 101

The number of unpaired d-electrons in \([Co(H_2 O)_6]^ 3+ \) is

JEE Main 2024 Solution View → 102

Number of complexes from the following with even number of unpaired " \(d\) " electrons is \( \) \([V(H_2 O)_6]^ 3+ ,[Cr(H_2 O)_6]^ 2+ ,[Fe(H_2 O)_6]^ 3+ ,[Ni(H_2 O)_6]^ 3+

JEE Main 2024 Solution View → 103

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

JEE Main 2024 Solution View → 104

Given below are two statements : Statement (I) : Dimethyl glyoxime forms a six membered covalent chelate when treated with NiCl _ 2 solution in presence of NH _ 4 OH . Statement

JEE Main 2024 Solution View → 105

[Co ( NH _ 3 ) _ 6 ] ^ 3 + and [ CoF _ 6 ] ^ 3 - are respectively known as:

JEE Main 2024 Solution View → 106

Which of the following complex is homoleptic?

JEE Main 2024 Solution View → 107

Given below are two statements: Statement (I): A solution of [Ni ( H _ 2 O) _ 6 ] ^ 2 + is green in colour. Statement (II): A solution of [Ni ( CN ) _ 4 ] ^ 2 - is colourless. In

JEE Main 2024 Solution View → 108

Select the option with correct property:

JEE Main 2024 Solution View → 109

Match List I with List II LIST – I (Complex ion) LIST – II (Electronic Configuration A. [Cr ( H _ 2 O) _ 6 ] ^ 3 + I. t _ 2g ^ 2 e _ g ^ 0 B. [Fe ( H _ 2 O) _ 6 ] ^ 3 + II. t _ 2g

JEE Main 2024 Solution View → 110

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

JEE Main 2024 Solution View → 111

The molecule/ion with square pyramidal shape is:

JEE Main 2024 Solution View → 112

Number of complexes which show optical isomerism among the following is _________. cis - [Cr ( ox ) _ 2 Cl _ 2 ] ^ 3 - , [Co ( en ) _ 3 ] ^ 3 + , cis - [Pt ( en ) _ 2 Cl _ 2 ] ^ 2

JEE Main 2024 Solution View → 113

The coordination geometry around the manganese in decacarbonyldimanganese (0)

JEE Main 2024 Solution View → 114

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

JEE Main 2024 Solution View → 115

Aluminium chloride in acidified aqueous solution forms an ion having geometry

JEE Main 2024 Solution View → 116

The correct IUPAC name of K _ 2 MnO _ 4 is:

JEE Main 2024 Solution View → 117

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

JEE Main 2024 Solution View → 118

Identity the incorrect pair from the following:

JEE Main 2024 Solution View → 119

Identify from the following species in which d ^ 2 sp ^ 3 hybridization is shown by central atom:

JEE Main 2024 Solution View → 120

The Spin only magnetic moment value of square planar complex [Pt ( NH _ 3 ) _ 2 Cl( NH _ 2 CH _ 3 )]Cl is _______ B.M. (Nearest integer) ( Given atomic number for Pt = 78 )

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