Comprehensive NCERT Solutions for Class 12 Coordination Compounds Chapter

coordination compounds ncert solutions cover all Class 12 questions with detailed answers, easy explanations, and PDF download options for quick revision.

Below are 50 sample questions and answers on coordination compounds, based on the NCERT curriculum for Class 12 Chemistry:

What is a coordination compound?

A coordination compound consists of a central metal atom or ion bonded to surrounding ligands (molecules or ions) through coordinate covalent bonds.

Define the term 'ligand'.

A ligand is an ion or molecule that donates a pair of electrons to a central metal atom or ion to form a coordination complex.

What is meant by 'coordination number'?

The coordination number is the number of ligand donor atoms bonded directly to the central metal atom or ion in a complex.

Explain the difference between a unidentate and a bidentate ligand.

A unidentate ligand has one donor atom that binds to the central metal atom, while a bidentate ligand has two donor atoms that can bind simultaneously to the central metal atom.

Give an example of a chelating ligand.

Ethylenediamine (en) is a chelating ligand because it has two donor atoms that can form a ring structure with the central metal atom.

What is the coordination number of cobalt in [Co(NH₃)₆]³⁺?

The coordination number is 6, as six ammonia molecules are bonded to the cobalt ion.

Write the IUPAC name for [Pt(NH₃)₂Cl₂].

The IUPAC name is diamminedichloridoplatinum(II).

What type of isomerism is exhibited by [Co(NH₃)₄Cl₂]⁺?

It exhibits geometrical (cis-trans) isomerism.

Describe linkage isomerism with an example.

Linkage isomerism occurs when a ligand can coordinate to the metal through two different atoms. For example, [Co(NH₃)₅(NO₂)]²⁺ can bind through nitrogen (nitro) or oxygen (nitrito).

What is crystal field splitting?

Crystal field splitting refers to the separation of d-orbital energies in a metal ion when ligands approach and interact electrostatically, leading to different energy levels.

Explain the spectrochemical series.

The spectrochemical series is a list of ligands ordered by their ability to split the d-orbital energies of the central metal ion, from weak field to strong field ligands.

Why is [Fe(CN)₆]⁴⁻ less paramagnetic than [Fe(H₂O)₆]²⁺?

In [Fe(CN)₆]⁴⁻, cyanide is a strong field ligand causing pairing of electrons, resulting in fewer unpaired electrons compared to [Fe(H₂O)₆]²⁺, where water is a weak field ligand.

What is the shape of [Ni(CN)₄]²⁻?

The shape is square planar.

How does the chelate effect influence the stability of coordination compounds?

The chelate effect increases stability due to the formation of ring structures, which reduce entropy loss upon binding.

Provide an example of a coordination compound used in medicine.

Cisplatin ([Pt(NH₃)₂Cl₂]) is used in chemotherapy treatments.

What is the oxidation state of chromium in [Cr(NH₃)₆]³⁺?

The oxidation state is +3.

Name the ligand in [Co(en)₃]³⁺.

The ligand is ethylenediamine (en).

What is the geometry of [Fe(CO)₅]?

The geometry is trigonal bipyramidal.

Explain the term 'ambidentate ligand' with an example.

An ambidentate ligand can coordinate to a metal ion through two different atoms. For example, the thiocyanate ion (SCN⁻) can bind through sulfur or nitrogen.

What is meant by 'inner orbital complex'?

An inner orbital complex involves the use of the metal's inner d-orbitals (n-1)d in bonding, leading to low-spin configurations.

Determine the number of unpaired electrons in [CoF₆]³⁻.

Cobalt in [CoF₆]³⁻ has four unpaired electrons.

Write the formula for tetraamminediaquacobalt(III) chloride.

The formula is [Co(NH₃)₄(H₂O)₂]Cl₃.

What is the color of [Cu(NH₃)₄]²⁺ in solution?

The complex is deep blue in color.

Explain geometrical isomerism in coordination compounds.

Geometrical isomerism arises when ligands can occupy different positions around the central metal ion, leading to distinct spatial arrangements, such as cis and trans forms.

Why do transition metal complexes exhibit color?

The color arises from d-d electronic transitions facilitated by the absorption of visible light.

What is the effective atomic number (EAN) of [Fe(CN)₆]⁴⁻?

The EAN is 36.

Describe the role of EDTA as a ligand.

EDTA is a hexadentate ligand that can bind to a metal ion through six donor atoms, effectively sequestering the metal ion.

What is the difference between a complex ion and a coordination compound?

A complex ion is a charged species consisting of a central metal ion bonded to ligands, while a coordination compound includes the complex ion and counterions to balance the charge.

How does crystal field theory explain magnetic properties?

Crystal field theory explains magnetic properties based on the distribution of electrons in split d-orbitals, determining the number of unpaired electrons.

Give an example of a coordination compound exhibiting optical isomerism.

[Co(en)₃]³⁺ exhibits optical isomerism due to its chiral structure.

What is the role of ligands in determining the geometry of a complex?

The size, charge, and electronic properties of ligands influence the spatial arrangement around the central metal ion, determining the geometry.

Explain the term 'labile complex'.

A labile complex undergoes rapid ligand exchange or substitution reactions.

What is the significance of the chelate effect in biological systems?

The chelate effect enhances the stability of metal complexes in biological systems, crucial for functions like oxygen transport and enzyme activity.

How does the oxidation state of the metal affect the stability of a coordination compound?

Higher oxidation states generally increase the metal's ability to accept electrons from ligands, influencing stability.

**What is the difference between hom

Top Indian Books on Coordination Compounds NCERT Solutions with Details

Modern's ABC of Chemistry Class 12 – Part II
Author: S.P. Jauhar
Publisher: Modern Publishers
Includes NCERT-based solved questions, HOTS, and assertion-reason type questions on coordination compounds with concept clarity for board exams.

Comprehensive Chemistry Class 12
Author: Dr. N.K. Sharma
Publisher: Laxmi Publications
Offers topic-wise theory with NCERT in-text and end-text solutions, including conceptual MCQs and solved numericals relevant to coordination compounds.

Pradeep’s New Course Chemistry Class 12
Author: S.N. Dhawan, K.N. Sharma
Publisher: Pradeep Publications
Features well-explained theory with extensive NCERT exercises and additional application-based questions for deep understanding.

Together with Chemistry Class 12
Author: R.K. Gupta
Publisher: Rachna Sagar
Covers NCERT questions along with CBSE sample papers, MCQs, and long answer type questions for coordination compounds.

Dinesh Objective Chemistry for NEET and Boards
Author: P. N. Kapil
Publisher: Dinesh Publications
Includes a mix of conceptual theory and objective-type questions, suitable for NEET and board-level practice of coordination compounds.

Arihant All in One Chemistry Class 12
Author: Arvind Arora
Publisher: Arihant Publications
Offers structured NCERT-based explanations, textbook solutions, case-based questions, and topic-wise assignments on coordination compounds.

CBSE Chapterwise Chemistry Class 12
Author: Dr. S. K. Singh
Publisher: Arihant Publications
Provides chapter-specific NCERT questions with board exam-style answers and topic insights focused on coordination chemistry.

Exemplar Problems – Chemistry Class 12
Author: NCERT Faculty
Publisher: National Council of Educational Research and Training (NCERT)
Contains advanced-level problems and solutions aligned with the NCERT framework, ideal for practice in coordination compounds.

GRB A Textbook of Physical and Inorganic Chemistry for Class 12
Author: O.P. Tandon
Publisher: GRB Books
Explains the theory of coordination compounds in detail, with solved examples, derivation-based Q&A, and competitive-level practice.

Trueman’s Elementary Chemistry Volume 2
Author: K.K. Sharma and L.D. Madan
Publisher: Trueman Book Company
Features simplified explanations with NCERT-solved questions, plus extra conceptual problems based on board patterns.

Xam Idea Chemistry Class 12
Author: Editorial Team
Publisher: VK Global Publications
Contains topic summaries, NCERT solutions, and latest CBSE exam questions on coordination compounds in student-friendly formats.

MTG CBSE Champion Chemistry Class 12
Author: MTG Editorial Board
Publisher: MTG Learning Media
Focuses on board-centric NCERT questions with detailed explanations, sample papers, and integrated concept checks.

Oswaal NCERT Solutions Chemistry Class 12
Author: Oswaal Editorial Board
Publisher: Oswaal Books
Gives NCERT-based solutions with topic insights, commonly asked questions, and tips for mastering coordination chemistry.

Full Marks Chemistry Class 12
Author: N. Kumar
Publisher: Full Marks Pvt. Ltd.
Provides simplified solutions to NCERT problems with step-by-step breakdown and Q&A exercises on coordination compounds.

Educart Chemistry NCERT Solutions Class 12
Author: Educart Experts
Publisher: Educart Publications
Offers solved NCERT questions, concept-based learning aids, and self-assessment tools focused on chapters like coordination compounds.

Target’s Chemistry Companion Class 12
Author: Dr. R.S. Saini
Publisher: Target Publications
Combines crisp theory with multiple-choice, long, and short answer questions on coordination chemistry aligned with NCERT.

NCERT at Your Fingertips – Chemistry
Author: MTG Editorial Team
Publisher: MTG Learning Media
Ideal for NEET aspirants, covers NCERT questions with topic-specific notes and Q&A on coordination compounds.

Kumar's Chemistry Masterclass Class 12
Author: Dr. V.K. Kumar
Publisher: G.R. Bathla Publications
Designed for competitive and board exams with in-depth coverage and a wide range of NCERT-style questions.

Saraswati Chemistry Lab Manual with Theory Class 12
Author: S.K. Jain & Shailesh K. Jain
Publisher: Saraswati House Pvt. Ltd.
Blends theory and lab-based understanding of coordination compounds with NCERT-oriented questions.

Golden Chemistry Class 12
Author: L. P. Singh
Publisher: New Age International
Contains detailed explanations and solved NCERT questions supported by model tests and board-preparation insights.

500-Word SEO-Friendly Article: Coordination Compounds NCERT Solutions

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