The Class 12 Chemistry Notes (2026-27 syllabus) condense every chapter of the rationalised NCERT textbook into examiner-style revision notes for the 70-mark CBSE theory paper. Each chapter ships as a free downloadable PDF with concept summaries, key derivations, labelled diagrams, and the formulae you actually need on board day.
- Chapters covered: 10 chapters across 9 CBSE units, identical numbering to the main NCERT textbook
- Format: chapter-wise PDFs plus combined all-chapters compilation, all free
- Length: 18 to 25 pages per chapter - long enough for second-pass revision, short enough for a single sitting
- Exam alignment: CBSE Class 12 Chemistry theory paper (70 marks), NEET, JEE Main, JEE Advanced
Every chapter in this Collegedunia Class 12 Chemistry Notes compilation is curated by subject experts, mapped to the 2026-27 rationalised NCERT, and refined against the last five years of CBSE Board sample papers and marking schemes.
Class 12 Chemistry Notes: All Chapters
Every chapter of the 2026-27 Class 12 Chemistry syllabus, with the chapter-specific Notes PDF linked on each row. The list runs in NCERT order so it mirrors the order you would revise the textbook in.
How will Collegedunia's Class 12 Chemistry Notes Help You?
Class 12 Chemistry Notes are written for the student who has finished the chapter once and now needs the shortest path to second-pass revision. The notes condense the textbook content while preserving every derivation and every diagram that CBSE has historically tested.
- 2026-27 NCERT alignment: every concept, derivation and worked example matches the rationalised Class 12 Chemistry syllabus.
- Examiner-style structure: concept introduction, formulae block, worked-example walkthrough, common-mistake callouts, exam-day quick-recall summary.
- Coloured callout boxes: formula boxes in orange, concept boxes in teal, common-mistake boxes in red. The visual structure speeds up second and third revision passes.
- Cross-resource navigation: jump from any chapter's notes into the Solutions, Formula Sheet, Handwritten Notes, or Exemplar Solutions for the same chapter in one click.
- Verified by subject experts: every formula, derivation, and diagram reviewed against the official NCERT textbook and the latest CBSE marking scheme.
- Mobile-friendly PDFs: standard-resolution downloads for phone reading and HD print-ready files for the board-day printout.
What 14,380 students told us about their Class 12 Chemistry revision strategy
Source: Magnet Brains on YouTube
Class 12 Chemistry Topic Map (2026-27 NCERT)
How the 10 Class 12 Chemistry chapters group into the CBSE units below. Each chapter's Notes PDF covers the concepts listed in NCERT order.
| Unit | Chapters | What this unit covers |
|---|---|---|
| II. Solutions | Ch 1 Solutions | Types of solutions, expressing concentration, solubility of gases in liquids, ideal and non-ideal solutions, Raoult's law, colligative properties (relative lowering of vapour pressure, elevation of boiling point, depression of freezing point, osmotic pressure), van't Hoff factor. |
| III. Electrochemistry | Ch 2 Electrochemistry | Redox reactions, EMF of a cell, standard electrode potential, Nernst equation, conductance in electrolytic solutions, Kohlrausch's law, electrolysis, Faraday's laws, primary and secondary batteries, fuel cells, corrosion. |
| IV. Chemical Kinetics | Ch 3 Chemical Kinetics | Rate of reaction (average and instantaneous), factors affecting rate, order and molecularity of reactions, rate law and rate constants, integrated rate equations (zero and first order), half-life, collision theory, Arrhenius equation. |
| VI. Coordination & Block Elements | Ch 4 The d- and f-Block Elements · Ch 5 Coordination Compounds | d-block transition elements (electronic configuration, oxidation states, magnetic properties, colour, alloy formation), f-block (lanthanide and actinide series), coordination compounds (Werner's theory, ligand classification, IUPAC nomenclature, VBT, CFT, isomerism in coordination compounds). |
| VII. Haloalkanes and Haloarenes | Ch 6 Haloalkanes and Haloarenes | Nomenclature, methods of preparation, physical and chemical properties, mechanisms of substitution and elimination (SN1, SN2, E1, E2), nature of C-X bond, polyhalogen compounds. |
| VIII. Alcohols, Phenols and Ethers | Ch 7 Alcohols, Phenols and Ethers | Classification, IUPAC nomenclature, methods of preparation, physical and chemical properties of alcohols, phenols and ethers, mechanism of dehydration, uses of alcohols and phenols. |
| IX. Aldehydes, Ketones and Carboxylic Acids | Ch 8 Aldehydes, Ketones and Carboxylic Acids | Nomenclature, nature of carbonyl group, methods of preparation, physical and chemical properties, mechanism of nucleophilic addition, reactivity of alpha-hydrogen in aldehydes, uses of aldehydes, ketones, carboxylic acids. |
| X. Amines | Ch 9 Amines | Classification of amines, structure, methods of preparation, physical and chemical properties, uses, identification of primary, secondary and tertiary amines, diazonium salts and their importance in synthetic organic chemistry. |
| XI. Biomolecules | Ch 10 Biomolecules | Carbohydrates (classification, monosaccharides, disaccharides, polysaccharides), proteins (elementary idea of amino acids, peptide bond, polypeptides, primary and secondary structure of proteins, denaturation), enzymes, vitamins, nucleic acids (DNA and RNA). |
NCERT Class 12 Chemistry Deleted Syllabus 2026-27
The NCERT 2026-27 syllabus for Class 12 Chemistry has been rationalised by the examination authority to reduce content load for CBSE Boards, JEE and NEET. The drops listed below are officially out of the 2026-27 question paper, so skip these while revising.
| Chapter | Deleted Topics (2026-27) |
|---|---|
| Solid State (formerly Ch 1) | Full chapter removed in the 2026-27 rationalisation; concepts of unit cell and packing efficiency are no longer tested. |
| Solutions (Ch 1) | Abnormal molar masses and van't Hoff factor (some sub-parts removed); ideal-vs-non-ideal solutions retained. |
| Electrochemistry (Ch 2) | Galvanic cell construction details removed; Nernst equation and conductance retained. |
| Surface Chemistry (formerly Ch 5) | Full chapter removed; colloids and adsorption are no longer in scope. |
| Coordination Compounds (Ch 5) | Stability constants and bonding in metal carbonyls (some parts removed). |
| p-Block Elements (Ch 7) | Group 15-18 oxidation-state trends rationalised; specific compounds dropped. |
| Polymers (Ch 10) | Classification by molecular forces removed; biodegradable polymers retained as qualitative. |
The chapter-wise resources linked in the All Chapters index above already flag every deleted line inline so you don't waste revision hours on dropped topics.
Class 12 Chemistry Chapter-wise Important Questions
The five chapter clusters below carry the bulk of the CBSE 2026 Class 12 Chemistry paper and repeat almost every year. The first column lists the long-answer topics that recur as 3-mark and 5-mark questions; the second column lists the application-level questions that appear as 1-3 mark numericals / MCQs / case-studies in CBSE and JEE Main / NEET.
| Chapter Cluster | Important Derivations / Reactions (3-5 marks) | Important Numericals (1-3 marks) |
|---|---|---|
| Physical Chemistry (Ch 1-3) | 1. Raoult's law and ideal-solution derivation. 2. Nernst equation for EMF calculation. 3. Integrated rate law for first-order kinetics. | Molarity / molality / mole fraction, EMF and standard electrode potential, half-life and rate constant. |
| Inorganic - p-Block & d-f Block (Ch 4-5, 7-8) | 1. Lanthanoid contraction and consequences. 2. Werner's theory and ligand-classification. 3. Structure and bonding in interhalogen compounds. | Magnetic moment, calculation of formal charge, ionic-radius vs atomic-number trend. |
| Coordination Compounds (Ch 5) | 1. IUPAC nomenclature of complex ions. 2. Geometric and optical isomerism examples. 3. CFT splitting in octahedral and tetrahedral complexes. | Magnetic moment from unpaired electrons, oxidation state of central atom, EAN calculation. |
| Organic - Carbonyl & Carboxylic Acids (Ch 8) | 1. Aldol condensation mechanism. 2. Cannizzaro reaction with mechanism. 3. Acidity comparison of carboxylic acids vs phenols. | Equivalent weight, percentage yield, distinguishing tests between aldehydes / ketones / carboxylic acids. |
| Organic - Amines, Biomolecules & Polymers (Ch 9-10) | 1. Hofmann's bromamide reaction mechanism. 2. Carbylamine reaction for primary amines. 3. Structure of nucleotides / nucleosides. | Distinguishing tests for 1°, 2°, 3° amines; carbohydrate identification (Benedict / Tollens). |
The same five clusters appear in JEE Main 2026 and NEET UG 2026 with a near-identical question split - JEE Main leans on physical-chemistry numericals while NEET front-loads inorganic-chemistry MCQs. The Expert's Solution tab on each chapter page works the JEE / NEET-style alternative path alongside the CBSE board-style minimum-steps version.
NCERT NOTES · CLASS 12 CHEMISTRY
Class 12 Chemistry - Exam Weightage
Class 12 Chemistry contributes roughly 200 marks combined across CBSE Boards, JEE Main, JEE Advanced and NEET UG, the second-heaviest science load after Physics on the senior-school flagship exams.
Class 12 Chemistry Notes Weightage Snapshot (CBSE 2026 Theory Paper)
The 70-mark CBSE Class 12 Chemistry theory paper splits unevenly. Inorganic Chemistry (Coordination + d/f Block) leads the table at 14 marks, working out to roughly 20% of the theory paper. Use the snapshot below to plan how much time each chapter's Notes deserve in your revision schedule.
| Chapter | Topic | CBSE Marks (2026) | JEE Main 2025 Qs |
|---|---|---|---|
| Ch 4 | The d- and f-Block Elements | 7 marks | 2 |
| Ch 5 | Coordination Compounds | 7 marks | 2 |
| Ch 1 | Solutions | 7 marks | 1 |
| Ch 8 | Aldehydes, Ketones and Carboxylic Acids | 7 marks | 2 |
| Ch 2 | Electrochemistry | 6 marks | 1 |
| Ch 3 | Chemical Kinetics | 6 marks | 1 |
| Ch 7 | Alcohols, Phenols and Ethers | 6 marks | 1 |
| Ch 10 | Biomolecules | 6 marks | 1 |
| Ch 6 | Haloalkanes and Haloarenes | 5 marks | 1 |
| Ch 9 | Amines | 5 marks | 1 |
Class 12 Chemistry CBSE 2026 Paper Pattern Snapshot
The 70-mark CBSE Class 12 Chemistry theory paper runs 3 hours and is split into five sections. Knowing the section-by-section weight is half the revision plan; once you know which section a chapter feeds, you can pick the right resource (Notes for Section A recall, NCERT Solutions for Sections C and D working).
- Section A (16 questions of 1 mark each): MCQs and assertion-reason; tests definitions, named-reaction recall, and reaction-product prediction.
- Section B (5 questions of 2 marks each): Very short answer; one-step questions on named reactions, conversion sequences, and reasoning.
- Section C (7 questions of 3 marks each): Short answer; numerical problems on colligative properties, Nernst equation, kinetics, plus reaction-mechanism questions.
- Section D (2 case-study questions of 4 marks each): Application of coordination chemistry, electrochemistry, or biomolecules to a passage.
- Section E (3 questions of 5 marks each): Long answer; usually one inorganic (d / f-block or coordination), one organic synthesis, and one physical-chemistry problem.
The 70-mark theory paper combined with the 30-mark internal assessment (practical, project, viva) makes the 100-mark scheme. Internal assessment marks scale linearly with lab-notebook completeness and viva preparation; the theory paper is where the chapter-wise NCERT preparation actually shows.
Where to Start in the Class 12 Chemistry Notes Index
NCERT order is the safest reading sequence. Students with a tighter window can re-prioritise by weightage; the six-chapter shortlist below covers 40 of 70 board marks:
- Chapter 4, The d- and f-Block Elements (7 marks): the inorganic backbone of the paper. Lanthanide contraction, magnetic behaviour, and oxidation-state comparison are routine LA slots.
- Chapter 5, Coordination Compounds (7 marks): VBT, CFT, and isomerism in coordination complexes are board-paper staples and high-yield on NEET.
- Chapter 1, Solutions (7 marks): colligative properties numericals carry guaranteed marks; van't Hoff factor problems test both formula recall and application.
- Chapter 8, Aldehydes, Ketones and Carboxylic Acids (7 marks): named reactions (Cannizzaro, aldol, Clemmensen, Wolff-Kishner) deliver 4-5 marks each. The reaction-mechanism block in organic chemistry.
- Chapter 2, Electrochemistry (6 marks): Nernst equation problems and conductance calculations are routine 3-mark slots.
- Chapter 3, Chemical Kinetics (6 marks): first-order rate-constant problems and half-life calculations are mechanical once practised.
Class 12 Chemistry Notes: PDF Formats and Languages
Every chapter in the Class 12 Chemistry Notes index ships in multiple formats plus a Hindi-medium counterpart.
- HD print-ready PDF: high-resolution figures and equations, recommended for the printed revision booklet.
- Standard download PDF: smaller file size for phone reading and quick reference.
- Hindi-medium PDF: chapter-wise Hindi translations using NCERT's own technical vocabulary (Rasayan Vigyan), including terms like विद्युत रसायन (electrochemistry), उपसहसंयोजन यौगिक (coordination compound), and जैव अणु (biomolecule).
- Combined all-chapters PDF: the entire subject's Notes as a single file for offline reading.
- Handwritten counterpart: the same content rendered notebook-style for students who prefer the board-feel revision.
How Class 12 Chemistry Notes Pair with the Other Resources
The Class 12 Chemistry Notes are the concept layer. Pair them with the back-exercise practice and the formula-recall layer for a complete revision routine.
- Class 12 Chemistry NCERT Solutions: open this alongside the Notes once you have read a chapter's concepts and want to verify your working on the back-exercise.
- Class 12 Chemistry Formula Sheet: the equation-only recall sheet for the last week before the boards.
- Class 12 Chemistry Exemplar Solutions: the harder problem set beyond the NCERT back-exercise; open these once the Notes feel familiar.
- Class 12 Chemistry Handwritten Notes: notebook-style revision for the final two weeks before the boards.
- Class 12 Chemistry NCERT Book PDF: the original textbook, useful when a Notes section references a worked example from the chapter.
- Class 12 Chemistry Exemplar Book PDF: the NCERT Exemplar Problems publication for additional practice.
How to Use the Class 12 Chemistry Notes Most Effectively
The three-pass revision routine below is the routine most CBSE toppers settle into.
5-STEP METHOD · CBSE TOPPER ROUTINE
How to Use the NCERT Notes - Class 12 Chemistry
- 1Read the chapter first. Open the NCERT Book PDF or chapter Notes - the resource assumes you understand the concepts already.
- 2Attempt each question on your own. Write the working in a notebook before opening the answer - passive reading does not build exam fluency.
- 3Compare your working to the resource. Mark every step where your approach differed - those are the spots that lose marks on the board paper.
- 4Flag questions taking over 7 minutes. These go on the re-attempt list for the final-week revision pass.
- 5Sketch each concept-map from memory. Before re-reading the Notes PDF, draw the chapter's flow in your own hand - recall is what builds exam fluency, not passive review.
- 1 month before the boards: first-pass reading of every chapter's Notes in NCERT order, marking the concepts you find unclear with a coloured tag for revisiting.
- 2 weeks before the boards: second-pass reading focused on the high-weightage chapters listed in the shortlist above. Re-attempt the worked-example walkthroughs from memory.
- 1 week before the boards: third-pass skim of the formula boxes and common-mistake callouts only. Pair the Notes with the Formula Sheet for last-day recall.
Common Mistakes Class 12 Chemistry Students Make Across Chapters
- Writing oxidation states without checking electron count: Chapter 4 students often write Mn(IV) without recalling the d3 configuration. Always verify the d-electron count against the oxidation state before answering.
- Skipping the geometry justification on Coordination questions: Chapter 5 questions reward the geometry-and-magnetism justification. State the hybridisation, the geometry, and the magnetic behaviour (paramagnetic or diamagnetic) in every coordination compound answer.
- Mixing up SN1 and SN2 conditions: Chapter 6 students apply SN2 to tertiary substrates. SN2 is single-step bimolecular and prefers primary substrates; SN1 is two-step unimolecular and prefers tertiary.
- Forgetting Markovnikov's rule on alcohol formation: Chapter 7 students often write the wrong product of acid-catalysed hydration. The OH adds to the more substituted carbon; the H adds to the less substituted one.
- Writing 'aldol' for any base-catalysed reaction: Chapter 8 students label every base-catalysed reaction as an aldol condensation. The aldol step requires alpha-hydrogen; without alpha-hydrogen, the Cannizzaro reaction operates instead.
- Confusing colligative property formulas: Chapter 1 numericals expect the correct formula per property. Relative lowering uses mole fraction, elevation and depression use molality times Kb or Kf, osmotic pressure uses cRT.
- Drawing structural formulas without lone pairs: Chapter 9 amines and Chapter 5 coordination questions both reward the lone-pair-on-nitrogen sketch. Skipping the lone pair on the basicity-comparison answer loses marks.
Student Pulse: What 14,380 Class 12 Chemistry Students Told Us
What 14,380 students told us about their Class 12 Chemistry revision strategy
- 72% of students rated Chapter 5 Coordination Compounds as the highest-effort chapter, ahead of Chapter 4 The d- and f-Block Elements at 61% and Chapter 3 Chemical Kinetics at 49%.
- Most-skipped chapter: Chapter 9 Amines (skipped by ~26% of students despite carrying 5 marks). Toppers flagged this as a high-ROI chapter to reclaim because the diazonium salt reactions repeat year on year.
- Toppers reported that working the Expert's Solution tab on every Chapter 4 The d- and f-Block Elements problem added 4-6 marks to their 70-mark theory paper score, mostly from the lanthanide-contraction and oxidation-state comparison questions.
- The average Class 12 Chemistry student spent 52 hours across the 10 chapters to finish the NCERT back-exercise once, with Chapters 4, 5, 7, 8 eating the most time per question.
Also Check: Related Class 12 Chemistry Resources
- Also Check: CBSE Class 12 Chemistry chapter notes hub on Collegedunia Exams
- Also Check: CBSE Class 12 exam pattern, dates, and full-subject hub
- Also Check: CBSE Class 12 Syllabus 2026-27
- Also Check: JEE Main 2026 exam information
- Also Check: JEE Main 2026 Syllabus
- Also Check: JEE Advanced 2026 information
- Also Check: NEET 2026 exam information
- Also Check: NEET 2026 Syllabus
Topper-tested takeaways for Class 12 Chemistry Notes
- Read the Notes in 25-minute focused blocks; longer blocks lose retention in the second half.
- Annotate the printed Notes with your own colour code for things you tend to forget.
- On the second-pass reading, skip the worked examples and focus on the formula boxes and the common-mistake callouts.
- The Notes are the chapter at 30% length; pair them with the NCERT Book PDF for the missing 70% when you need a deeper read.
Class 12 Chemistry Notes FAQs
Ques. Where can I download the Class 12 Chemistry Notes PDF?
Ans. Every chapter-wise Class 12 Chemistry Notes PDF is downloadable directly from the index above, from Chapter 1 Solutions through Chapter 10 Biomolecules. A combined all-chapters PDF is also linked. Both Normal and HD resolutions are free.
Ques. Is this Class 12 Chemistry Notes aligned with the 2026-27 NCERT?
Ans. Yes. Every chapter reflects the current 2026-27 syllabus. Where NCERT rationalised content out of the older edition, the affected sections carry an inline callout flagging the change so you do not over-revise dropped material.
Ques. How many chapters are there in Class 12 Chemistry per the 2026-27 NCERT?
Ans. Class 12 Chemistry has 10 chapters across the CBSE units: Solutions (Ch 1), Electrochemistry (Ch 2), Chemical Kinetics (Ch 3), Coordination & Block Elements (Ch 4, Ch 5), Haloalkanes and Haloarenes (Ch 6), Alcohols, Phenols and Ethers (Ch 7), Aldehydes, Ketones and Carboxylic Acids (Ch 8), Amines (Ch 9), Biomolecules (Ch 10). The Topic Map table above lists every chapter under its unit.
Ques. Which Class 12 Chemistry chapter has the highest CBSE board weightage?
Ans. Inorganic Chemistry (Coordination + d/f Block) is the heaviest unit at 14 marks. The Weightage Snapshot table above tracks each chapter's mark share so you can plan your revision time around the high-yield chapters.
Ques. How are these Class 12 Chemistry Notes different from the other Class 12 Chemistry resources?
Ans. The Class 12 Chemistry Notes is best paired with the back-exercise (NCERT Solutions) and the formula recall (Formula Sheet). Each resource on Collegedunia covers the same chapter list but in a different format; together they make a complete revision toolkit.
Ques. Are these Class 12 Chemistry Notes files available in Hindi medium?
Ans. Yes. Every chapter ships with a Hindi-medium download alongside the English version. The Hindi files follow NCERT's own technical vocabulary (Rasayan Vigyan) so that students preparing in Hindi medium find the same terminology they have studied in.
Ques. What does Class 12 Chemistry cover?
Ans. Class 12 Chemistry covers 9 CBSE units across 10 chapters: Solutions (Ch 1), Electrochemistry (Ch 2), Chemical Kinetics (Ch 3), Coordination & Block Elements (Ch 4, Ch 5), Haloalkanes and Haloarenes (Ch 6), Alcohols, Phenols and Ethers (Ch 7), Aldehydes, Ketones and Carboxylic Acids (Ch 8), Amines (Ch 9), Biomolecules (Ch 10). The 70-mark theory paper plus the 30-mark internal assessment together make 100 marks.
Ques. Which is the most-scoring chapter in Class 12 Chemistry?
Ans. The chapters in the Inorganic Chemistry (Coordination + d/f Block) block carry the largest share of the 70-mark paper. The six-chapter shortlist in the Where to Start section above together delivers 40 of 70 board marks.
Ques. How should I structure my Class 12 Chemistry preparation?
Ans. Build chapter by chapter, prioritising the high-weightage units. Use the Notes for concepts, the NCERT Solutions for back-exercise, the Exemplar for harder practice, and the Formula Sheet for the last week. The Study Plan section above sketches the 1-month / 2-week / 1-week countdown that most toppers settle into.
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