The 2026-27 NCERT retains Chapter 5 Coordination Compounds as a full Inorganic Chemistry unit covering Werner's theory, IUPAC nomenclature, isomerism, Valence Bond Theory, Crystal Field Theory, and bonding in metal carbonyls. It is the single highest-weightage chapter in the Class 12 Chemistry Boards. This page hosts the latest NCERT Book PDF and a complete reading map.
- CBSE Weightage: 7 to 9 marks (usually one 3-mark IUPAC + isomerism question plus one 5-mark CFT/hybridisation case)
- JEE Main Weightage: 4 to 5% (3 to 4 questions per shift, mix of CFT, isomerism, and EAN)
- NEET Weightage: 3 to 4 questions per year
The PDF above is the full official NCERT print for Chapter 5 of the Class 12 Chemistry Part-I book. The reading map and rationalisation notes further down will help you decide which sections to study deeply and which to skim for the 2026 Boards.
This NCERT Book PDF is sourced from the official NCERT 2026-27 edition and cross-verified against the CBSE Class 12 Chemistry syllabus document released for the 2026 Board exam.
Also Check:
- Class 12 Chemistry Chapter 4 The d- and f-Block Elements NCERT Book PDF
- Class 12 Chemistry Chapter 6 Haloalkanes and Haloarenes NCERT Book PDF
- CBSE Class 12 Chemistry Syllabus 2026-27
Coordination Compounds Weightage Compared Across Class 12 Chemistry Chapters
The visual below maps the typical CBSE Board marks distribution across all 10 chapters of the current 2026-27 NCERT Class 12 Chemistry book, averaged over the last five board papers. Coordination Compounds sits at the very top of the table along with Solutions, both carrying 8 marks on average.
Coordination Compounds Video Chapter Walkthrough
Source: Magnet Brains on YouTube
How will Collegedunia's NCERT Book PDF Help You with Coordination Compounds?
The official NCERT print is the single source of truth for CBSE Boards, and this page wraps it with the navigation aids that the PDF itself does not carry.
- 2026-27 NCERT Alignment: The PDF here is the latest NCERT print, with every change from the previous edition flagged in the rationalisation section below.
- Section Map with Page Ranges: The breakdown table further down lets you jump straight to a sub-topic (e.g. CFT splitting, IUPAC naming) without scrolling through 36 pages.
- Reading Sequence: The skim-then-deep-dive plan tells you which sections to read first and which intext examples carry the highest CBSE mark return.
- Cross-Reference to Companion Resources: Every section in the PDF is mapped to the matching Collegedunia Notes, Formula Sheet, and NCERT Solutions for that sub-topic.
Coordination Compounds NCERT Intext Examples and Their Sub-Topics
The 2026-27 print of Chapter 5 carries 9 solved intext examples spread across roughly 28 pages of theory. Each example targets one specific skill that recurs in CBSE numericals and short-answer items. The table tags every example with the sub-topic it tests and the skill expected in the answer.
| Example | Sub-topic | Skill tested |
|---|---|---|
| 5.1 | Oxidation state of central metal in [Co(NH3)5Cl]Cl2 | Apply charge balance to find +x on Co |
| 5.2 | Formula from name (potassium tetrahydroxidozincate(II)) | Write formula in correct order using IUPAC rules |
| 5.3 | IUPAC name of [Pt(NH3)2Cl(NH2CH3)]Cl | Alphabetise ligands, indicate stereochemistry |
| 5.4 | Geometrical isomers of [Pt(NH3)2Cl2] | Draw cis and trans square-planar pairs |
| 5.5 | Optical isomers of [Co(en)3]3+ | Draw enantiomeric octahedral pair |
| 5.6 | Hybridisation and shape of [NiCl4]2- | Apply VBT to a tetrahedral d8 complex |
| 5.7 | Predict magnetic moment of [Co(NH3)6]3+ | Use μ = √n(n+2) BM with VBT pairing |
| 5.8 | CFSE for an octahedral high-spin d5 ion | Apply CFSE = (-0.4 nt2g + 0.6 neg)o |
| 5.9 | EAN rule for [Fe(CO)5] | Add metal d-electrons and electron pairs donated |
Coordination Compounds NCERT Book: Section-by-Section Breakdown with Page Numbers
The chapter has eight numbered sections plus a summary and exercises, and the table below maps each to its approximate page range and one-line scope. Sections 5.3 (IUPAC nomenclature), 5.5 (isomerism), and 5.6 (bonding theories) together account for more than two-thirds of all CBSE marks from this chapter.
| Section | Title | Pages | What it covers |
|---|---|---|---|
| 5.1 | Werner's Theory of Coordination Compounds | 1-4 | Primary vs secondary valencies, structural conductivity evidence for cobalt-ammine series |
| 5.2 | Definitions of Some Important Terms in Coordination Compounds | 4-6 | Coordination entity, ligand, denticity, chelate, coordination number, oxidation number |
| 5.3 | Nomenclature of Coordination Compounds | 6-10 | Formula and IUPAC name rules, ligand prefixes, oxidation-state notation |
| 5.4 | Isomerism in Coordination Compounds | 10-14 | Stereoisomerism (geometric, optical) and structural isomerism (linkage, ionisation, coordination, solvate) |
| 5.5 | Bonding in Coordination Compounds | 14-22 | Valence Bond Theory, inner/outer orbital complexes, magnetic moment predictions and limitations |
| 5.6 | Bonding in Metal Carbonyls | 22-24 | Sigma donation and pi back-bonding, structures of [Ni(CO)4], [Fe(CO)5], [Cr(CO)6] |
| 5.7 | Stability of Coordination Compounds | 24-26 | Stability constants K and beta, factors affecting stability, chelate effect |
| 5.8 | Importance and Applications of Coordination Compounds | 26-28 | Biological systems, metallurgy, qualitative and quantitative analysis, photography |
| - | Summary, Exercises (35 Qs) | 28-36 | End-of-chapter problems for board-level practice |
The 35 end-of-chapter exercises split roughly into 12 IUPAC nomenclature items, 10 isomerism / structural drawing questions, 8 VBT/CFT applications, and 5 conceptual short-answer items. The IUPAC and VBT blocks are the ones that have shown up most reliably in CBSE Boards.
How to Read Coordination Compounds from the NCERT Class 12 Chemistry Book
The PDF rewards a three-pass reading rather than a single linear read. Most students who finish the chapter in one sitting forget the IUPAC ligand prefixes within a week.
- Pass 1 — Skim (1 hour): Read only the section headings, the summary, and the boxed nomenclature rules. The goal is to know what's in the chapter, not to memorise anything.
- Pass 2 — Deep read (4 to 5 hours): Read sections 5.1 to 5.6 in order, hand-draw the cis/trans/d/l isomers, and solve every intext example without looking at the answer first.
- Pass 3 — Practice (3 to 4 hours): Attempt the 35 end-of-chapter exercises in two sittings. Use the worked Collegedunia NCERT Solutions only after a genuine attempt.
Coordination Compounds Top 5 Formulae for Quick Recall
These five expressions cover almost every CBSE Board numerical and most JEE Main questions from the chapter. The complete master table with hybridisation flowcharts and CFSE worked cases lives on the dedicated Collegedunia Formula Sheet.
| Quantity | Formula |
|---|---|
| Spin-only magnetic moment | μ = √n(n+2) BM, where n = number of unpaired electrons |
| CFSE for octahedral complex | CFSE = (-0.4 nt2g + 0.6 neg) o |
| CFSE for tetrahedral complex | t = 49 o |
| Effective Atomic Number (EAN) | EAN = Z - oxidation state + 2 × (coordination number) |
| Stability constant (stepwise to overall) | n = K1 × K2 × × Kn |
Full master table: Coordination Compounds Class 12 Chemistry Formula Sheet
What Changed in Coordination Compounds for 2026-27 NCERT (Rationalisation Note)
The 2026-27 NCERT Class 12 Chemistry Part-I retains Coordination Compounds, but a few sub-topics from the older 2022 print were trimmed when the syllabus was revised. The chapter also moved from Chapter 9 (legacy numbering) to Chapter 5 in the current edition. Knowing what stayed and what went is the cheapest way to avoid wasted study time.
| Sub-topic | Status in 2026-27 | Notes |
|---|---|---|
| Werner's theory and definitions | Kept | Core section, unchanged |
| IUPAC nomenclature of mononuclear complexes | Kept | Core section, unchanged |
| Stereoisomerism and structural isomerism | Kept | Core section, all four structural isomer types retained |
| Valence Bond Theory (VBT) | Kept | Core section, inner / outer orbital complex treatment intact |
| Bonding in metal carbonyls (pi back-bonding) | Kept | Compact one-page section retained |
| Crystal Field Theory (CFT) - octahedral and tetrahedral | Trimmed | Splitting diagrams retained, but extended discussion of colour and limitations was condensed |
| Stability constants and applications | Kept | Detailed numerical treatment retained |
Students using the older 2022 NCERT print are studying close to 3 extra pages of trimmed content, mostly extended CFT discussions. The PDF on this page is the latest official 2026-27 NCERT.
Class 12th Chemistry Coordination Compounds Multi-Day Study Plan
A four-day plan spreads the chapter so each bonding theory is practised at least twice before the chapter is closed. The fourth day is reserved for the CFT/CFSE numericals, which carry the highest mark-per-minute return at JEE Main level.
| Day | What to read | What to practise | Time |
|---|---|---|---|
| Day 1 | Sections 5.1 and 5.2 (Werner's theory, definitions) | Intext example 5.1 plus exercises 5.1 to 5.6 | 2 hours |
| Day 2 | Section 5.3 (IUPAC nomenclature) | Intext examples 5.2 and 5.3 plus exercises 5.7 to 5.16 | 3 hours |
| Day 3 | Section 5.4 (isomerism), Section 5.5 (VBT) | Intext examples 5.4 to 5.7 plus exercises 5.17 to 5.28 | 3 hours |
| Day 4 | Sections 5.6 to 5.8 (carbonyls, stability, applications) plus full revision | Intext examples 5.8 and 5.9 plus exercises 5.29 to 5.35 | 2.5 hours |
Coordination Compounds PYQ Trend in CBSE, JEE Main and NEET (2026 to 2021)
The three most repeated question types from this chapter in the last five years are: IUPAC naming of a complex, hybridisation-plus-magnetic-moment prediction, and isomer drawing. The mini-table below maps the topic most frequently asked each year; the full year-wise question map sits on the NCERT Solutions page.
| Year | CBSE Board | JEE Main | NEET |
|---|---|---|---|
| 2026 | IUPAC name plus VBT hybridisation (3 marks) | CFSE for d6 octahedral, 2 questions | Pending (exam rescheduled) |
| 2025 | Geometric and optical isomers of [Co(en)2Cl2]+ (3 marks) | Spectrochemical series ordering, 2 questions | Magnetic moment from unpaired electrons, 2 questions |
| 2024 | Crystal Field Splitting in [Fe(CN)6]3- vs [Fe(H2O)6]3+ (5 marks) | EAN rule for metal carbonyl, 1 question | IUPAC nomenclature, 1 question |
| 2023 | Linkage isomerism with -NO2 ligand (2 marks) | Stability of chelates, 1 question | Inner vs outer orbital complex, 2 questions |
| 2022 | Ligand denticity and chelate definition (1 mark) plus IUPAC naming (3 marks) | CFSE values, 2 questions | Werner's theory primary vs secondary valencies, 1 question |
| 2021 | - | - | - |
Full year-wise PYQ map: Coordination Compounds Class 12 Chemistry NCERT Solutions
Author, Edition and Publisher Information for the Coordination Compounds NCERT PDF
The PDF on this page is taken from the official publication, not a third-party reprint. Always study from the latest print because the rationalisation changes and chapter renumbering are not back-ported to older copies.
- Book: Chemistry Part-I, Class 12 (Textbook for Class XII)
- Chapter: 5 — Coordination Compounds (legacy Chapter 9 in pre-rationalisation prints)
- Publisher: National Council of Educational Research and Training (NCERT)
- Edition: 2026-27 reprint (post-rationalisation)
- Total pages in the chapter: 36 pages including summary and exercises
- Language editions available: English, Hindi (Rasayan Vigyan Bhag-I)
If your school has issued a 2022 or earlier copy, request the latest reprint through the school office or use the official PDF on this Collegedunia page in parallel.
Related Links:
- Class 12 Chemistry NCERT Book PDF (All Chapters)
- CBSE Class 12 Chemistry Sample Papers 2026
- CBSE Class 12 Chemistry Previous Year Question Papers
More Coordination Compounds Chemistry Class 12 Resources
- Coordination Compounds Class 12 Chemistry NCERT Solutions
- Coordination Compounds Class 12 Chemistry Notes
- Coordination Compounds Class 12 Chemistry Formula Sheet
- Coordination Compounds Class 12 Chemistry NCERT Exemplar Book PDF
- Coordination Compounds Class 12 Chemistry NCERT Exemplar Solutions
- Coordination Compounds Class 12 Chemistry Handwritten Notes
NCERT Book PDF for Class 12 Chemistry: All Chapters
The table lists every chapter of the Class 12 Chemistry 2026-27 NCERT, each linking to its dedicated Collegedunia NCERT Book PDF page.
| Chapter | Resource |
|---|---|
| Chapter 1 | Solutions NCERT Book PDF |
| Chapter 2 | Electrochemistry NCERT Book PDF |
| Chapter 3 | Chemical Kinetics NCERT Book PDF |
| Chapter 4 | The d- and f-Block Elements NCERT Book PDF |
| Chapter 6 | Haloalkanes and Haloarenes NCERT Book PDF |
| Chapter 7 | Alcohols, Phenols and Ethers NCERT Book PDF |
| Chapter 8 | Aldehydes, Ketones and Carboxylic Acids NCERT Book PDF |
| Chapter 9 | Amines NCERT Book PDF |
| Chapter 10 | Biomolecules NCERT Book PDF |
Coordination Compounds Class 12 Chemistry NCERT Book PDF FAQs
Ques. Where can I download the Class 12 Chemistry Chapter 5 Coordination Compounds NCERT Book PDF?
Ans. You can download the Coordination Compounds Class 12 Chemistry NCERT Book PDF directly from this page. Both the Normal and HD versions are available and both are free, with no registration required.
Ques. Is the Coordination Compounds chapter aligned with the 2026-27 NCERT?
Ans. Yes. The PDF reflects the current 2026-27 syllabus for Class 12 Chemistry. The chapter retains all eight core sections on Werner's theory, definitions, IUPAC nomenclature, isomerism, VBT, bonding in metal carbonyls, stability, and applications; the extended discussion of CFT colour and limitations has been condensed in the new edition.
Ques. How many pages is the Class 12th Chemistry Coordination Compounds NCERT Book PDF?
Ans. The chapter runs roughly 36 pages, including the 8 numbered sections, 9 intext examples, the summary, and the 35 end-of-chapter exercises.
Ques. How many marks does Coordination Compounds carry in the CBSE Class 12 Chemistry Board exam?
Ans. Coordination Compounds typically carries 7 to 9 marks in the Class 12 Chemistry Board exam. It is jointly the highest-weightage chapter alongside Solutions. The marks are usually split as one 3-mark IUPAC + isomerism question plus one 5-mark hybridisation or CFT case study.
Ques. Why was the chapter renumbered from 9 to 5?
Ans. The 2026-27 NCERT reduced the Class 12 Chemistry book from 16 chapters (across Parts I and II) to a single 10-chapter Part-I book. Coordination Compounds moved from old Chapter 9 to current Chapter 5 in this consolidation. The chapter content itself is largely retained; only the numbering changed.
Ques. Which intext examples in Coordination Compounds are most important for Boards?
Ans. Examples 5.3 (IUPAC naming), 5.4 (geometric isomers), 5.6 (VBT hybridisation of tetrahedral complex), and 5.7 (magnetic moment prediction) are the highest-yield. Practise each at least twice before the exam.
Ques. Has any topic been removed from Coordination Compounds in the latest NCERT edition?
Ans. No major sub-topic was fully removed. The Crystal Field Theory discussion of colour and the limitations of CFT was trimmed to a shorter form in the 2026-27 print; all eight numbered sections and both bonding theories (VBT and CFT) are intact.
Ques. How long should I take to complete the Coordination Compounds NCERT chapter?
Ans. A four-day plan of about 10 to 11 hours total is realistic — one day for Werner's theory and definitions, one for IUPAC nomenclature, one for isomerism plus VBT, and one for carbonyls/stability/applications plus full revision. The Collegedunia multi-day study plan further up on this page breaks the hours down section by section.
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