Coordination Compounds — JEE Main PYQs & Practice Questions

Coordination Compounds is a Chemistry chapter in the JEE Main syllabus. This page brings together 259 previous-year and practice questions on Coordination Compounds, organised into 7 topics: Ligands and Coordination Number, IUPAC Nomenclature, Isomerism in Coordination Compounds, Crystal Field Theory, Werner's Theory and Terminology, Valence Bond Theory and Stability of Complexes. Most questions come with a step-by-step solution you can work through free in PrepWiser.

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Ligands and Coordination Number

• Which of the following is a bidentate ligand?
• In which one of the following metal carbonyls, CO forms a bridge between metal atoms?
• The total number of coordination sites in ethylenediaminetetraacetate (EDTA 4– ) is _____.
• Given below are two statements : Statement (I) : Dimethyl glyoxime forms a six-membered…
• Given below are two statements: Statement I: N(CH₃)₃ and P(CH₃)₃ can act as ligands to…
• 1 mol of an octahedral metal complex with formula MCl₃ . 2L on reaction with excess of…
• EDTA is a hexadentate ligand.
• Identify the homoleptic complexes with odd number of d electrons in the central metal…
• Number of ambidentate ligands among the following is _________. NO₂⁻, SCN⁻, C₂ O₄²⁻…
• Number of ambidentate ligands in a representative metal complex [M(en)(SCN)₄] is…
• Given below are two statements. • Statement I : In CuSO₄ . 5H₂O, Cu-O bonds are present…
• Choose the correct statements from the following : (A) Ethane-1, 2-diamine is a…
• The denticity of the ligand present in the Fehling's reagent is ___________.
• Given below are two statements: one is labelled as "Assertion A" and the other is…
• Number of bridging CO ligands in [Mn₂(CO)₁₀] is __________.
• The sum of bridging carbonyls in W(CO)₆ and Mn₂(CO)₁₀ is ____________.
• Cobalt chloride when dissolved in water forms pink colored complex X which has…
• In the following brown complex, the oxidation state of iron is +_____________…
• Which of the following complex is homoleptic?
• The coordination geometry around the manganese in decacarbonyldimanganese (0) is

IUPAC Nomenclature

• The IUPAC name of K₃[Co(C₂ O₄)₃] is:-
• The correct IUPAC name of K₂ MnO₄ is
• Complex X of composition Cr(H₂O)₆Clₙ has a spin only magnetic moment of 3.83 BM. It…
• The compound K₄[Fe(CN)₆] is named:
• In complex nomenclature, "ammine" refers to ammonia as a ligand while "amino" refers to…
• [Co(NH₃)₆]³⁺ and [CoF₆]³⁻ are respectively known as :
• The IUPAC name of [Co(NH₃)₆]Cl₃ is:
• The correct IUPAC name of [PtBr₂(PMe₃)₂] is :
• The number of words in the IUPAC name "potassium hexacyanoferrate(II)" is x. Count…
• The IUPAC name of complex [Pt(NH₃)₂Cl(NH₂CH₃)]Cl is:

Isomerism in Coordination Compounds

• The number of possible optical isomers for the complexes MA₂B₂ with sp³ and dsp²…
• The number of isomers possible for [Co(NH₃)₄Cl₂]³⁺ is:
• If Ni²⁺ is replaced by Pt²⁺ in the complex [NiCl₂ Br₂]²⁻, which of the following…
• Number of complexes which show optical isomerism among the following is ________. cis-…
• Which of the following complex has a possibility to exist as meridional isomer?
• Match List - I with List - II : List - I | List - II ; (a) | [Co(NH₃)₆][Cr(CN)₆] | (i) |…
• The number of optical isomers exhibited by the iron complex (A) obtained from the…
• Given below are two statements: Statement I : A homoleptic octahedral complex, formed…
• An octahedral complex having molecular composition Co · 5 NH₃ · Cl² . SO₄ has two…
• Consider a mixture ' X ' which is made by dissolving 0.4 mol of [Co(NH₃)₅SO₄]Br and 0.4…
• One mole of the octahedral complex compound Co(NH₃)₅ Cl₃ gives 3 moles of ions on…
• Indicate the complex/complex ion which did not show any geometrical isomerism :
• The number of isomers possible for [Pt(en)(NO₂)₂] is :
• Which of the following complexes will show coordination isomerism? A…
• Consider the complex ions, trans-[Co(en)₂Cl₂]⁺ (A) and cis-[Co(en)₂Cl₂]⁺ (B). The…
• [Co(en)₃]³⁺ does not show optical isomerism.
• The complex cation which has two isomers is :
• (a) CoCl₃.4NH₃, (b) CoCl₃.5NH₃, (c) CoCl₃.6NH₃ and (d) CoCl(NO₃)₂.5NH₃. Number of…
• Chiral complex from the following is : Here en = ethylene diamine
• Number of stereoisomers possible for the complexes, [CrCl₃(py)₃] and [CrCl₂(ox)₂]³⁻ are…

Crystal Field Theory

• The crystal field splitting energy (Δ₀) is largest for:
• [Ti(H₂O)₆]³⁺ absorbs light of wavelength 498 nm during a d - d transition. The…
• The octahedral diamagnetic low spin complex among the following is :
• Identify the diamagnetic octahedral complex ions from below ; A. [Mn(CN)₆]³⁻ B…
• Arrange the following coordination compounds in the increasing order of magnetic…
• Consider the transition metal ions Mn³⁺,Cr³⁺,Fe³⁺ and Co³⁺ and all form low spin…
• Complexes (ML₅) of metals Ni and Fe have ideal square pyramidal and trigonal bipyramidal…
• Consider the following metal complexes : [Co(NH₃)₆]³⁺ [CoCl(NH₃)₅]²⁺ [Co(CN)₆]³⁻…
• Match List - I with List - II. List - I Chromium (III) Complexes (en = ethylene diamine)…
• Among the statements(a)-(d) the incorrect ones are : (a) Octahedral CO(III) complexes…
• Match List I with List II LIST I Coordination Complex | LIST II Number of unpaired…
• Given below are two statements : Statement I : [CoBr₄]²⁻ ion will absorb light of lower…
• A transition metal (M) among Mn, Cr, Co and Fe has the highest standard electrode…
• Which one of the following complexes will have Δₒ=0 and μ=5.96 B.M?
• Identify the homoleptic complex(es) that is/are low spin. (A) [Fe(CN)₅ NO]²⁻ (B)…
• The d-electron configuration of [Ru(en)₃ ]Cl₂ and [Fe(H₂O)₆]Cl₂ , respectively are :
• Given below are two statements, one is labelled as Assertion A and the other is labelled…
• In potassium ferrocyanide, there are ________ pairs of electrons in the t_(2g) set of…
• The correct order of energy of absorption for the following metal complexes is : A…
• The calculated magnetic moments (spin only value) for species [FeCl₄]²⁻, [Co(C₂O₄)₃]³⁻…

Werner's Theory and Terminology

• 'X' is the number of acidic oxides among VO₂, V₂O₃, CrO₃, V₂O₅ and Mn₂O₇. The primary…
• CrCl₃ · xNH₃ can exist as a complex. 0.1 molal aqueous solution of this complex shows a…
• For the reaction given below : CoCl₃ . xNH₃ + AgNO₃ (aq) → If two equivalents of AgCl…
• Which of the following are the example of double salt? A. FeSO₄ ·(NH₄)₂ SO₄ · 6 H₂ O B…
• From the magnetic behaviour of [NiCl₄]²⁻ (paramagnetic) and [Ni(CO)₄] (diamagnetic)…
• The secondary valency and the number of hydrogen bonded water molecule(s) in CuSO₄…
• Sum of oxidation state (magnitude) and coordination number of cobalt in Na[Co(bpy) Cl₄]…
• In the cobalt-carbonyl complex : [Co₂(CO)₈], number of Co-Co bonds is "X" and terminal…
• Match List I with List II List - I (Substances) | List - II (Element Present); (A) |…
• The conductivity of a solution of complex with formula CoCl₃(NH₃)₄ corresponds to 1 : 1…
• Match List - I with List - II List - I | List - II ; (a) | Chlorophyll | (i) |…
• The primary and secondary valencies of cobalt respectively in [Co(NH₃)₅Cl]Cl₂ are :
• 1 L, 0.02 M solution of [Co(NH₃)₅ SO₄] Br is mixed with 1 L, 0.02 M solution of…
• 3 moles of metal complex with formula Co(en)₂Cl₃ gives 3 moles of silver chloride on…
• In [Co(NH₃)₆]Cl₃, the oxidation state of Co is x.
• Match List - I with List - II . List - I (Complex) | List - II (Primary valency and…
• Three moles of AgCl get precipitated when one mole of an octahedral co-ordination…
• An octahedral complex with the formula CoCl₃ · nNH₃ upon reaction with excess of AgNO₃…
• Total number of moles of AgCl precipitated on addition of excess of AgNO₃ to one mole…
• Complex A has a composition of H₁₂O₆Cl₃Cr. If the complex on treatment with conc.H₂SO₄…

Valence Bond Theory

• Identify the correct statements from the following A. [Fe(C₂O₄)₃]³⁻ is the most stable…
• Number of complexes which will exhibit synergic bonding amongst, [Cr(CO)₆], [Mn(CO)₅]…
• Match List I with List II List - I (Complex) | List - II (Hybridization); (A) | Ni(CO)₄…
• Given below are two statements : Statement I : [Ni(CN)₄]²⁻ is square planar and…
• The correct order of the calculated spin-only magnetic moments of complexs (A) to (D)…
• 5.33 g of CrCl₃·6H₂O, which is a 1 : 3 electrolyte, is dissolved in water and is passed…
• An excess of AgNO₃ is added to 100 mL of a 0.05 M solution of…
• Select the option with correct property -
• The theory that can completely/properly explain the nature of bonding in [Ni(Co)₄] is :
• Match List I with List II : List I (Complexes) | List II (Hybridisation) ; A. |…
• The type of hybridisation and magnetic property of the complex [MnCl₆]³⁻, respectively…
• Identify the CORRECT set of details from the following : A. [Co(NH₃)₆]³⁺ : Inner orbital…
• According to the valence bond theory the hybridization of central metal atom is dsp² for…
• The number of paramagnetic complexes among [FeF₆]³⁻,[Fe(CN)₆]³⁻,[Mn(CN)₆]³⁻, [Co(C₂…
• The hybridization and magnetic behaviour of cobalt ion in [Co(NH₃)₆]³⁺ complex…
• Given below are two statements : Statement I : [Mn(CN)₆]³⁻, [Fe(CN)₆]³⁻ and…
• The correct statements about metal carbonyls are A. The metal-carbon bonds in metal…
• Match List - I with List - II. List - I (Complex) | List - II (Hybridisation & Magnetic…
• The number of species from the following that are involved in sp³d² hybridization is…
• The type of hybridization and the magnetic property of [MnCl₆]³⁻ are,

Stability of Complexes

• Low oxidation state of metals in their complexes are common when ligands :
• Which one of the following metal complexes is most stable?
• White precipitate of AgCl dissolves in aqueous ammonia solution due to formation of :
• The number of moles of NH₃, that must be added to 2L of 0.80 M AgNO₃ in order to reduce…
• To inhibit the growth of tumours, identify the compounds used from the following : A…
• The overall stability constant of the complex ion [Cu(NH₃)₄]²⁺ is 2.1 × 10¹³. The…
• The complex that dissolves in water is :

More Chemistry chapters

• Mole Concept & Stoichiometry
• Atomic Structure
• Gaseous State
• Chemical Thermodynamics
• Chemical Equilibrium
• Ionic Equilibrium
• Redox Reactions
• Solutions & Colligative Properties
• Electrochemistry
• Chemical Kinetics
• Solid State
• Surface Chemistry
• Nuclear & Radiochemistry
• Periodic Table & Periodicity
• Chemical Bonding & Molecular Structure
• Hydrogen & s-Block Elements
• p-Block Elements — Part I (Group 13 & 14)
• Environmental Chemistry
• p-Block Elements — Part II (Group 15-18)
• d & f Block Elements
• Metallurgy
• Qualitative Analysis — Salt Analysis
• Purification & Characterisation of Organic Compounds
• General Organic Chemistry (GOC)
• Hydrocarbons — Alkanes
• Hydrocarbons — Alkenes & Alkynes
• Hydrocarbons — Aromatic (Arenes)
• Halogen Derivatives — Haloalkanes & Haloarenes
• Alcohols, Phenols & Ethers
• Aldehydes & Ketones
• Carboxylic Acids & Their Derivatives
• Amines & Diazonium Salts
• Carbohydrates & Biomolecules
• Polymers
• Chemistry in Everyday Life
• Practical Organic Chemistry

Frequently asked questions

How many Coordination Compounds questions are there for JEE Main?

PrepWiser has 259 Coordination Compounds questions for JEE Main, grouped into 7 topics such as Ligands and Coordination Number, IUPAC Nomenclature and Isomerism in Coordination Compounds.

Are these Coordination Compounds questions from previous-year JEE Main papers?

Yes — most are genuine previous-year questions from past JEE Main papers, and the rest are practice questions written to match the JEE Main pattern and difficulty.

Where can I see the answers and solutions to these Coordination Compounds questions?

Open any Coordination Compounds question in PrepWiser (it is free) to attempt it; most come with a step-by-step solution.