Start learning →

JEE Main Unit 2B1: Transition Metals & Coordination Compounds — practice questions

Explore 61 free Unit 2B1: Transition Metals & Coordination Compounds questions in JEE Main Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

Practise Unit 2B1: Transition Metals & Coordination Compounds with Quill →

Unit 2B1: Transition Metals & Coordination Compounds questions and exercises with answers

Showing questions 1–30 of 61.

In a coordination compound, the central atom is usually:Read the answer and worked solution →Coordination number is:Read the answer and worked solution →In [Cu(NH3)4]²⁺ what is the oxidation number of Cu?Read the answer and worked solution →What is the coordination number in [Co(NH3)6]³⁺?Read the answer and worked solution →What is the geometry of complex with coordination number 6 typically?Read the answer and worked solution →What is the geometry of [Ni(CN)4]²⁻?Read the answer and worked solution →Crystal Field Theory: in an OCTAHEDRAL field, the d-orbitals split into:Read the answer and worked solution →Spectrochemical series (ligand strength): which is a STRONG-field ligand?Read the answer and worked solution →Which type of isomerism arises when two ligands can bind through different donor atoms (e.g., NO2⁻ via N vs O)?Read the answer and worked solution →Cis and trans isomers of [Co(NH3)4Cl2]⁺ are examples of:Read the answer and worked solution →Which complex is paramagnetic?Read the answer and worked solution →EDTA is a:Read the answer and worked solution →The complex [Fe(CN)6]⁴⁻ is:Read the answer and worked solution →In strong-field octahedral, electron filling order in d-orbitals follows:Read the answer and worked solution →Oxidation state of Co in [Co(NH3)5Cl]Cl2:Read the answer and worked solution →Number of geometric isomers of [Pt(NH3)2Cl2] (square planar):Read the answer and worked solution →For octahedral d6 with weak-field ligands (high-spin), number of unpaired electrons:Read the answer and worked solution →For octahedral d6 with STRONG-field ligands (low-spin), number of unpaired electrons:Read the answer and worked solution →Number of unpaired electrons in [FeF6]³⁻ (high-spin, F⁻ weak-field):Read the answer and worked solution →Hybridization in [Ni(CO)4] (Ni is 0 oxidation state, sp3 because CO is strong-field for Ni⁰):Read the answer and worked solution →For [Cr(H2O)6]³⁺, d-electron count and magnetic behavior:Read the answer and worked solution →Which one is an ambidentate ligand?Read the answer and worked solution →For octahedral [Mn(H2O)6]²⁺, d-electron count and unpaired e⁻ count:Read the answer and worked solution →Name of complex K3[Fe(CN)6]:Read the answer and worked solution →For [Cu(NH3)4(H2O)2]²⁺ (octahedral with 4 NH3 equatorial + 2 H2O axial), this is:Read the answer and worked solution →In coordination compound [Cu(NH₃)₄]SO₄, the central metal is:Read the answer and worked solution →Coordination number of a metal is:Read the answer and worked solution →Denticity of a ligand refers to:Read the answer and worked solution →Werner's coordination theory introduced primary and secondary valencies. Primary valency corresponds to:Read the answer and worked solution →Oxidation state of Cr in [Cr(NH₃)₆]Cl₃:Read the answer and worked solution →

Worked practice questions

In a coordination compound, the central atom is usually:

  1. An anion
  2. A transition metal cation or neutral atom
  3. A noble gas
  4. A non-metal
Show answer and solution

Correct answer: B. A transition metal cation or neutral atom

The central atom or ion in a coordination complex is typically a transition metal cation (which can accept multiple lone pairs into d-orbitals). **Examples:** Co³⁺, Fe²⁺, Cu²⁺, Ni²⁺.

Open this question →

Coordination number is:

  1. Number of donor atoms directly bonded to central metal
  2. Charge on metal
  3. Number of electrons
  4. Number of ligands
Show answer and solution

Correct answer: A. Number of donor atoms directly bonded to central metal

Coordination number = number of donor atoms (not ligands!) directly bonded to the metal. For polydentate ligands, one ligand contributes multiple donor atoms. **Typical CN:** 4 (tetrahedral/square planar), 6 (octahedral).

Open this question →

In [Cu(NH3)4]²⁺ what is the oxidation number of Cu?

  1. +3
  2. +2
  3. +1
  4. 0
Show answer and solution

Correct answer: B. +2

NH3 is neutral. Complex charge is +2. So Cu oxidation state = +2 + 0 - 0 = +2. (Cu²⁺ ion with 4 NH3 ligands.)

Open this question →

How to practise

  1. Choose a Unit 2B1: Transition Metals & Coordination Compounds question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with Unit 2B1: Transition Metals & Coordination Compounds practice for JEE Main. Read explanations as you go. No signup form needed to start.

Practise Unit 2B1: Transition Metals & Coordination Compounds →

More Chemistry topics

Aldehydes, Ketones and Carboxylic AcidsElectrochemistryStructure of AtomThe d- and f-Block Elements & Coordination CompoundsSolutionsRedox ReactionsChemical KineticsOrganic Chemistry: Some Basic Principles and Techniques