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NCERT Exemplar for class 12 Chemistry chapter 9 has been created by experts. It includes complete solutions for all the unsolved questions from the textbook exercises. These NCERT Exemplar Solutions for Class 12 Chemistry chapter 9 are very helpful for improving your understanding of the concepts.
They can also assist you in entrance exams like JEE mains Exam and NEET Exam. NCERT Solutions for class 12 Chemistry chapter 9 is a valuable resource for students preparing for their exams.
Practicing the important questions of chemistry class 12 chapter 9 can be extremely beneficial not only for exams but also for helping Class 12 students do well in upcoming competitive exams. The Syllabus for class 12 Chemistry provides a comprehensive overview of the topics covered in the chapter.
The solutions are explained in easy-to-understand language while following the correct format for NCERT Exemplar Solutions for Class 12 Chemistry chapter 9. Special care has been taken to provide approaches for answering the questions accurately without going off track. In exams, good time management when answering questions is crucial for getting the best results.
NCERT Exemplar Class 12 Chemistry Chapter 9 – Coordination Compounds PDF
Prepare for your Class 12 Chemistry exams with the NCERT Exemplar for Chapter 9 – Coordination Compounds. This PDF resource provides detailed NCERT solutions to all the questions from the textbook exercises. Designed by experts, it covers key topics like nomenclature, isomerism, bonding, and properties of coordination compounds.
Also Check – NCERT Solutions for Class 12 Chemistry
Practicing these solutions will help you understand the concepts better and score well in your exams. Get the NCERT Exemplar Class Chemistry Chapter 9 – Coordination Compounds PDF to stay ahead in your preparation for the Class 12 Chemistry Syllabus.
Class 12 Chemistry Chapter 9 – Coordination Compounds Questions with Answers
Ques: Define coordination compounds.
Ans: Coordination compounds are complex molecules in which a central metal atom is bonded to a set of molecules or anions, called ligands, through coordinate bonds. These compounds exhibit unique properties and play important roles in various biological and chemical processes.
Ques: What is a ligand? Give an example.
Ans: A ligand is a molecule or ion that binds to the central metal atom in a coordination compound through coordinate covalent bonds. Example: In [Cu(NH3)4]^2+, ammonia (NH3) acts as a ligand.
Ques: Explain the term ‘coordination number’ with an example.
Ans: The coordination number of a central metal atom in a coordination compound is the number of ligand atoms that are directly bonded to it. Example: In [PtCl6]^2-, the coordination number of Pt is 6.
Ques: What is meant by the chelate effect?
Ans: The chelate effect refers to the increased stability of a coordination compound formed when a ligand binds to a metal atom through multiple donor atoms, forming a ring structure. This multidentate binding is more stable compared to unidentate binding due to the formation of stable ring structures.
Must See! – CBSE Class 12 Syllabus
Ques: Name the type of isomerism exhibited by [Co(NH3)5Br]SO4 and [Co(NH3)5SO4]Br.
Ans: These compounds exhibit ionization isomerism. The isomers differ in the identity of the counterion that is not directly bonded to the metal center.
Ques: Explain crystal field theory.
Ans: Crystal field theory (CFT) describes the electronic structure of transition metal complexes. It considers the effect of the electrostatic field created by the ligands on the d-orbitals of the metal ion, leading to the splitting of the d-orbitals into different energy levels. This splitting explains the color, magnetic properties, and stability of the complexes.
Ques: What is the difference between a homoleptic and heteroleptic complex?
Ans: A homoleptic complex has only one type of ligand attached to the central metal ion, while a heteroleptic complex has more than one type of ligand. Example: [Co(NH3)6]^3+ is homoleptic, while [Co(NH3)4Cl2]+ is heteroleptic.
Ques: Write the IUPAC name of [Ni(CO)4].
Ans: The IUPAC name is Tetracarbonylnickel(0).
Ques: Explain the term ‘ambidentate ligand’ with an example.
Ans: An ambidentate ligand is a ligand that can bind to a central metal atom through two different atoms. Example: The thiocyanate ion (SCN^-) can bind through either the sulfur atom or the nitrogen atom.
Ques: What is the oxidation state of the central metal in [Fe(CN)6]^4-?
Ans: The oxidation state of Fe in [Fe(CN)6]^4- is +2. This is calculated by knowing that CN^- has a charge of -1, and the complex overall has a charge of -4. So, Fe+6(−1)=−4Fe + 6(-1) = -4Fe+6(−1)=−4, thus Fe=+2Fe = +2Fe=+2.
Ques: Describe linkage isomerism with an example.
Ans: Linkage isomerism occurs when a ligand can coordinate to a metal ion through two different atoms. Example: [Co(NH3)5(NO2)]^2+ and [Co(NH3)5(ONO)]^2+ are linkage isomers, where the NO2 ligand binds through nitrogen in the former and through oxygen in the latter.
Ques: Why do transition metal complexes exhibit color?
Ans: Transition metal complexes exhibit color due to the d-d electron transitions. When light is absorbed, electrons in the lower-energy d-orbitals get excited to higher-energy d-orbitals, and the specific wavelengths of light absorbed correspond to the colors observed.
Ques: Explain the stability of chelate complexes.
Ans: Chelate complexes are generally more stable than similar complexes with unidentate ligands due to the chelate effect. The formation of ring structures in chelate complexes reduces the entropy loss during complex formation, increasing the stability of the complex.
Ques: What is the geometrical structure of [PtCl4]^2-?
Ans: The geometrical structure of [PtCl4]^2- is square planar. Platinum in the +2 oxidation state commonly forms square planar complexes.
Ques: Explain the term ‘coordination sphere’.
Ans: The coordination sphere includes the central metal ion and the ligands directly bonded to it, enclosed in square brackets in the chemical formula. Example: In [Cu(NH3)4]SO4, [Cu(NH3)4]^2+ is the coordination sphere.
Key Topics Covered in NCERT Exemplar for Class 12 Chemistry Chapter 9: Coordination Compounds
This chapter delves into the fascinating world of coordination compounds, exploring the various concepts and principles that govern their behavior. Let’s take a closer look at the topics covered:
- Werner’s Theory of Coordination Compounds
Learn about the groundbreaking work of Alfred Werner, the father of coordination chemistry, and his theory that explains the structure and bonding in these compounds.
- Definitions of Important Terms
Familiarize yourself with the essential terminology used in the study of coordination compounds, such as ligands, coordination number, and oxidation state.
- Nomenclature of Coordination Compounds
Understand the systematic rules and conventions for naming different types of coordination compounds, which is crucial for effective communication and understanding.
- Isomerism in Coordination Compounds
Explore the various types of isomerism, such as structural, geometrical, and optical isomerism, that can occur in coordination compounds and how they affect the compounds’ properties.
- Bonding in Coordination Compounds
Delve into the theories and models that explain the nature of the chemical bonds in coordination compounds, including the valence bond theory and the crystal field theory.
- Bonding in Metal Carbonyls
Investigate the unique bonding interactions between metal atoms and carbon monoxide (CO) ligands, which give rise to the interesting properties of metal carbonyls.
- Stability of Coordination Compounds
Analyze the factors that contribute to the stability of coordination compounds, such as the strength of the metal-ligand bonds and the chelate effect.
- Importance and Applications
Discover the wide-ranging importance and applications of coordination compounds in various fields, including analytical chemistry, catalysis, and medicine.By mastering these topics, you’ll develop a comprehensive understanding of coordination compounds and their significance in the world of chemistry.
NCERT Exemplar Solutions for Class 12 Chemistry Chapter 9 FAQs
What is the purpose of the NCERT Exemplar Solutions for Class 12 Chemistry Chapter 9?
NCERT Exemplar Solutions provide detailed, step-by-step answers to all the questions in the NCERT Exemplar book for Class 12 Chemistry Chapter 9 on Coordination Compounds. They help students understand the concepts better and prepare for exams.
Who has created these NCERT Exemplar Solutions?
NCERT Exemplar Solutions have been created by subject experts and experienced teachers to provide authoritative and reliable answers to the questions.
How can these solutions help in exam preparation?
Practicing these solutions helps students gain a strong command over the topics covered in Chapter 9. The solutions explain the concepts clearly and provide insights into solving different types of questions, which is very useful for exams.
Are the solutions aligned with the CBSE syllabus?
Yes, the NCERT Exemplar Solutions strictly follow the CBSE syllabus and guidelines for Class 12 Chemistry. They cover all the important topics and concepts from Chapter 9 as per the curriculum.
Where can I find these NCERT Exemplar Solutions?
NCERT Exemplar Solutions for Class 12 Chemistry Chapter 9 are available in the NCERT Exemplar book published by NCERT. They can also be found online on various education websites and apps that provide NCERT Solutions.
