CBSE Class 12 Chemistry Coordination Chemistry Assignment

Official CBSE Assignments for Class 12 Chemistry

Review targeted academic assignments with the CBSE Class 12 Chemistry Coordination Chemistry Assignment. Built according to official CBSE standards for the 2026-27 term, these downloadable Class 12 Chemistry worksheets support effective daily practice for Unit 5 Coordination Compounds.

Solved Practice Assignments for Chemistry

View or download the dedicated CBSE Class 12 Chemistry Coordination Chemistry Assignment resource below. Engaging with these assignments under focused study conditions ensures continuous academic progress and mastery of the 2026-27 curriculum.

 
LEVEL-1 QUESTIONS
 
1.Define Ligand . Give one example also.
The ion or molecules which are coordinately bonded to central metalatom in the coordination entity are called ligands.
 
2. Why Coordination compounds are coloured?
Due to d-d transition.
 
3. What is Homoleptic complexes?
The complexes in which a metal is bound to only one kind of donorgroups. E.g., [Co(NH3)6]3+
 
4. What is the Oxidation no. of cobalt in K[Co(CO)4]?
+1
 
5. Explain each of the following: coordination entity, ligand, coordination number, coordination polyhedron, homoleptic and heteroleptic.
Answer
(i)Coordination entity:
A coordination entity is an electrically charged radical or species carrying a positive ornegative charge. In a coordination entity, the central atom or ion is surrounded by a suitablenumber of
neutral molecules or negative ions ( called ligands)
 
(ii)Ligands
The neutral molecules or negatively charged ions that surround the metal atom in acoordination entity or a coordinal complex are known as ligands. For example,,Cl−, −OH. Ligands are usually polar in nature and possess at least one unshared pair ofvalence electrons.
 
(iii)Coordination number:
The total number of ligands (either neutral molecules or negative ions) that get attached tothe central metal atom in the coordination sphere is called the coordination number of thecentral metal atom. It is also referred to as its ligancy.
 
(vi)Coordination polyhedron:
Coordination polyhedrons about the central atom can be defined as the spatial arrangement of the ligands that are directly attached to the central metal ion in the coordination sphere.
 
(v)Homoleptic complexes:
These are those complexes in which the metal ion is bound to only one kind of a donorgroup.
 
(vi)Heteroleptic complexes:
Heteroleptic complexes are those complexes where the central metal ion is bound to morethan one
type of a donor group.
 
6. What is meant by unidentate, didentate and ambidentate ligands? Give two examples for each.
Answer A ligand may contain one or more unshared pairs of electrons which are called the donorsites of ligands. Now, depending on the number of these donor sites, ligands can be classifiedas follows:
 
(a)Unidentate ligands: Ligands with only one donor sites are called unidentate ligands. Fore.g., ,Cl− etc.
 
(b)Didentate ligands: Ligands that have two donor sites are called didentate ligands. Fore.g.,

(a) Ethane-1,2-diamine

(b) Oxalate ion

(c)Ambidentate ligands:
Ligands that can attach themselves to the central metal atom through two different atoms arecalled ambidentate ligands.

7.Write the name of each of the following complex compound
(a) [Co(NH3)4(H2O)2]Cl3
(b) [Pt(NH3)4][NiCl4]
Ans. (a) Tetraamminediaquacobalt(III)chloride
(b) Tetraammineplatinum(II)tetrachloridonickelate(II)

8 Write the IUPAC name of [CrCl2(en)(NH3)2]+
Ans. Diamminedichloridoethane-1,2-diamminechromium(III)ion

9 Why only transition metals are known to form π complexes?
Ans. Transition metals have empty d-orbitals into which the electron-pairs can be donated by ligands containing π electrons, i.e, electrons in their π molecular orbital.

10. CO is a stronger ligand than NH3. Why?
Ans. Back bonding.

11. What is crystal field splitting energy?
Energy difference between eg and t2g level.

12. Differentiate between:

a) Didentate and Polydentate ligand

Didentate ligand : Two binding sites

Polydentate ligand: more than two binding sites

b) Chelate ligand and ambidentate ligand

Chelate ligand : Forms cyclic structure.

ambidentate ligand : Bind through either of the atoms.
 
 
Please click the link below to download CBSE Class 12 Chemistry Coordination Chemistry Assignment
 

Free study material for Chemistry

Chapter Assignment & Practice Material for Class 12 Chemistry Unit 5 Coordination Compounds

Revision Assignment: Unit 5 Coordination Compounds (CBSE)

Review targeted chapter assignments for Class 12 Chemistry Unit 5 Coordination Compounds. Built according to official CBSE guidelines, these downloadable problem sets help students build accuracy and prepare effectively for school tests.

Why Practice Class 12 Chemistry Assignments?

  • Exam Alignment: Questions strictly follow contemporary CBSE sample papers and grading schemes.
  • Comprehensive Coverage: Features objective drills, case studies, and structured descriptive problems for Unit 5 Coordination Compounds.
  • Pacing & Precision: Regular problem-solving builds critical calculation speed and test-taking accuracy.

Steps to Complete Unit 5 Coordination Compounds Assignments Successfully

  1. Concept Foundation: Review the NCERT book for Class 12 Chemistry thoroughly before diving into assignment tasks.
  2. Self-Evaluation: Solve exercises independently before inspecting professional answer guides.
  3. Progress Monitoring: Note down complex formulas or concepts, clearing them up using available online practice aids.

FAQs

Where can I download the latest CBSE Class 12 Chemistry Unit 5 Coordination Compounds assignments?

You can download free PDF assignments for Class 12 Chemistry Unit 5 Coordination Compounds from StudiesToday.com. These practice sheets have been updated for the 2026-27 session covering all concepts from latest NCERT textbook.

Do these Chemistry Unit 5 Coordination Compounds assignments include solved questions?

Yes, our teachers have given solutions for all questions in the Class 12 Chemistry Unit 5 Coordination Compounds assignments. This will help you to understand step-by-step methodology to get full marks in school tests and exams.

Are the assignments for Class 12 Chemistry Unit 5 Coordination Compounds based on the 2026 exam pattern?

Yes. These assignments are designed as per the latest CBSE syllabus for 2026. We have included huge variety of question formats such as MCQs, Case-study based questions and important diagram-based problems found in Unit 5 Coordination Compounds.

How can practicing Unit 5 Coordination Compounds assignments help in Chemistry preparation?

Practicing topicw wise assignments will help Class 12 students understand every sub-topic of Unit 5 Coordination Compounds. Daily practice will improve speed, accuracy and answering competency-based questions.

Can I download Chemistry Unit 5 Coordination Compounds assignments for free on mobile?

Yes, all printable assignments for Class 12 Chemistry Unit 5 Coordination Compounds are available for free download in mobile-friendly PDF format.