NCERT Solutions Class 12 Chemistry Chapter 9

NCERT Solutions Class 12 Chemistry Chapter 9 Coordination Compounds

Chemistry is an important and a very scoring subject for students of science, in Class 12. With planned studying, solving sample papers, and past papers , students can not only develop a very good understanding, they can also score excellent marks in Class 12 Chemistry Examinations. NCERT Solutions Class 12 Chemistry Chapter 9 is on Coordination compounds.

Extramarks NCERT Solutions Class 12 Chemistry Chapter 9 set helps students plan a proper strategy while answering questions from this exercise. Students must conform to the study materials and understand the ideas provided in the syllabus. Students can participate in the self-assessment process by doing exercises independently and matching their answers to the solution sets.

The NCERT Solutions for Class 12 Chemistry Chapter 9  will assist students in learning about ” Coordination compounds” and comprehending the concepts associated with them. Also, this Chapter, which is part of the CBSE Class 12 Chemistry semester – II Syllabus, contains fundamental concepts such as atoms and chemical reactions. As a result, Coordination compounds include complete NCERT Solutions for Class 12 Chemistry Chapter 9 exercise questions. NCERT 2022 Solutions for Class 12 Chemistry are available in the form of links and include comprehensive step-by-step solutions and explanations. Students can also study these papers offline by using the links provided by Extramarks.

Key Topics Covered in NCERT Solutions Class 12 Chemistry Chapter 9

One of the most intriguing lessons in CBSE Class 12 Chemistry is ‘Coordination Compounds’. The Chapter on Coordination compounds describes the various transition metal complexes. In Class 12 Chemistry Chapter 9 NCERT Solutions, the distinctive features of these compounds are addressed.

New concepts such as bonding models, molecular structure, and vital insights into the functioning of complex components of the biological system have all been generated as a result of progress in this area.

The naming of Coordination Compounds in the IUPAC system and identifying the related chemical formulae when an IUPAC name is given are some of the concepts you’ll learn in this Chapter. After studying this Chapter, students will understand the meaning of terms such as central ion, atom, ligand, coordination sphere, coordination polyhedron, and oxidation number. Students will also study the rules of coordination compound nomenclature.

Key concepts to remember from NCERT Solutions Class 12 Chemistry Chapter 9:

Werner’s Theory of Coordination compounds.

  • The idea of coordination molecules was proposed by Werner. According to Werner’s theory metals have primary/ionisable valency and secondary/non-ionisable valency.
  • Metal atoms tend to satisfy both their primary and secondary valencies.
  • Secondary valency ligands are always directed towards specific places in space, giving the complex a particular geometry, whereas primary valencies are non-directional.

Definitions of Some Important Terminologies About Coordination compounds:

  • Nomenclature of Coordination compounds

Nomenclature is very crucial in Coordination Chemistry. This is so, because defining formulas and writing systematic names, especially when working with isomers, in a very simple and straightforward manner, helps students understand as well as recollect better. The formulas and nomenclature for coordination entities are based on the International Union of Pure and Applied Chemistry recommendations (IUPAC).

  • Isomerism in Coordination compounds

The development of coordination Chemistry required the presence of coordination molecules with the same formula but various ligand configurations. Isomers are two or more compounds with the same procedure but distinct atom configurations.

  • Bonding in Coordination compounds

The bonding theories for Coordination compounds are discussed in this Chapter. In Coordination compounds, there are essentially three bonding ideas that are utilised to characterise the bonding. The valence bond theory is the first. Linus Pauling proposed the valence bond idea in 1931 to explain covalent bonding in molecules of main group elements.

  • Bonding in Metal Carbonyls

Transition metal coordination complexes containing carbon mono-oxide ligands are known as metal carbonyls. Metal carbonyls are used in organic synthesis and homogeneous catalysis, such as hydroformylation, as catalysts or catalyst precursors.

  • Stability of Coordination compounds.

Thermodynamic and kinetic stability are two types of stability in coordination molecules.

  • G=H-TS=-RT lnK

where H is the enthalpy, S is the entropy, and K is the equilibrium constant for the reaction.

Where H is the enthalpy, S is the entropy, and K is the equilibrium stable for the response.

Reactivity, or ligand substitution, is referred to as kinetic stability. Substitution can happen very quickly in some instances and very slowly in others. Labile complexes and inert complexes are referred to as such. These two types of stability can sometimes be found in tandem, but most of the time, they are not.

  • Importance and Applications of Coordination compounds.

Coordination compounds are utilised as catalysts in various industrial processes and have a wide range of applications in analytical chemistry, including qualitative and quantitative chemical analysis. Coordination compounds are essential in biological systems, and they also play a crucial role in metallurgy and medicine.


Coordination entity, Central atom/ion, Ligands, Coordination number, Coordination sphere, Coordination polyhedron, and the Oxidation number of the central atom homoleptic and heteroleptic complexes, are some of the other topics covered under the important terminologies.

Important Questions: NCERT Solutions Class 12 Chemistry Chapter 9

  • How many geometrical isomers can Co(NH3)3Cl3 have?
  • What are the various types of isomerism that coordination compounds can exhibit? For each, give an example.
  • Explain the chelate effect, and give an example.
  • Explain the difference between unidentate, bidentate, and ambidentate ligands with two examples each.
  • What does the stability of a coordination compound in solution mean? What are the factors that govern stability complexes?
  • Explain Werner’s postulates for the bonding in Coordination compounds.

NCERT Exemplar NCERT Solutions Class 12 Chemistry Chapter 9

Questions from Past Year Question Papers and Sample Papers, Numerical Problems, and Worksheets are included in the NCERT Solutions Class 12 Chemistry Chapter 9 and the NCERT Class 12 Chemistry Exemplar for Chapter 9 Coordination compounds. Getting familiar with the Example questions will prepare you for the Class 12 Chemistry test and will aid you in scoring well on graduate entrance examinations such as JEE and NEET. The NCERT Class 12 Chemistry Solutions Chapter 9 links include various questions, including multiple-choice questions, short answer questions, numerical problems, and more.

Access to Links of NCERT Solutions Class 12 Chemistry Chapter 9

Modern Inorganic Chemistry – The Chemistry of coordination molecules is both vital and problematic. Extramarks subject specialists created the NCERT Solutions for Class 12, intending to assist students in effectively preparing for their second-term Examinations. Aside from structured questions, this solution Chapter 9 Chemistry Class 12 NCERT Solutions includes extensive explanations of key topics from past year Examination papers, exemplary questions, MCQs, and HOTS (Higher Order Thinking Skills) to aid students in learning ‘Coordination Chemistry’ through these Notes and grasping ‘Coordination Compound Principles’.

Students can use the NCERT Solutions Class 12 Chemistry Chapter 9 to help them understand the main concepts in order to get good grades and avoid future difficulties. Extramarks subject experts developed these solutions in accordance with the most recent revision of the term – II CBSE Syllabus 2021-22. Click the link below to access the Chemistry NCERT Solutions for Class 12 of this Chapter.

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Academic scholars at Extramarks create NCERT Solutions to assist students in understanding concepts more quickly and correctly. NCERT Solutions provide comprehensive, step-by-step solutions to textbook difficulties. All Classes have access to NCERT Solutions.

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Advantages of NCERT Solutions Class 12 Chemistry Chapter 9

The following are the main advantages of NCERT Solutions.

  • Our NCERT Solutions for Class 12 Chemistry Chapter 9 comply with the latest NCERT syllabus and will help students understand and write accurate answers to the tests.
  • Logical explanations accompany each question as these NCERT Solutions were prepared under the supervision of experienced teachers at Extramarks.
  • Furthermore, these NCERT Solutions follow precise CBSE Board guidelines, allowing students to ace the correct answer patterns for their board exams.

As a result, Chemistry Class 12 students looking for dependable study resources can access and study the Coordination Compounds Class 12 NCERT Solutions available at the Extramarks website.

FAQs (Frequently Asked Questions)

1. How important is the Chapter on Coordination compounds in the NCERT Solutions Class 12 Chemistry Chapter 9?

In the inorganic section of Chemistry, the Coordination compounds Chapter is quite important. Along with the d and f block elements, Coordination compounds is an important topic. The inorganic segment has a total of 12 marks. As a result, anticipate a rush of questions from coordination compounds. The NCERT Solutions for Coordination compounds, Class 12, can assist students in better understanding and reviewing their work. This Chapter is critical for the inorganic component of the Chemistry Examination. Students can access the Coordination compounds Class 12 NCERT Solutions from the links provided by Extramarks for better preparation. This will assist students in performing better on their Class 12 Examination.

2. Could you offer a quick synopsis of the ' Coordination compounds' Chapter?

Chapter 9 of Class 12 Chemistry discusses the different transition metal complexes, which is devoted to Coordination compounds. The distinguishing characteristics of these compounds are discussed in this Chapter.The IUPAC system for naming coordination compounds and determining the related chemical formulae when an IUPAC name is given are some of the subjects covered in this Chapter. Check the summary and NCERT Class 12 Solutions Chapter 9 Coordination Compound by clicking the given link. These answers are based on the up-to-date CBSE standards and examination format.


3. How do you answer questions about coordination compounds in NCERT Solutions Class 12 Chemistry Chapter 9?

The majority of the questions in Chemistry Chapter 9 Coordination compounds will be about naming the chemical formulas of the compounds. It is also necessary to draw the orbitals for the various compounds. Students may then be asked to explain why certain combinations are coloured the way they are. If you’re seeking answers to these questions, the NCERT Solutions for Coordination compounds Class 12 are an excellent place to start. This will assist you in writing accurate responses to all NCERT problems. Also, students who can answer the problems should use the Coordination compounds Class 12 NCERT Solutions links to double-check their work.