The Class 12 Chemistry Notes (2026-27 syllabus) shorten every chapter of the rationalised NCERT textbook into examiner-style revision notes for the 70-mark CBSE theory paper. Each chapter comes as a free PDF you can download.
Class 12 Chemistry Notes PDF Download
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, the same order you would revise the textbook in.
It has 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 to read in one sitting
- Exam alignment: CBSE Class 12 Chemistry theory paper (70 marks), NEET, JEE Main, JEE Advanced
Subject experts wrote every chapter in this Collegedunia Class 12 Chemistry Notes set. Each one matches the 2026-27 rationalised NCERT. We also checked them against the last five years of CBSE Board sample papers and marking schemes.
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 wants the fastest way to a second-pass revision. The notes shorten the textbook content, but keep every derivation and every diagram that CBSE has tested before.
- 2026-27 NCERT alignment: every concept, derivation and worked example matches the rationalised Class 12 Chemistry syllabus.
- Examiner-style structure: concept intro, formulae block, worked-example walkthrough, common-mistake callouts, and an exam-day quick-recall summary.
- Coloured callout boxes: formula boxes in orange, concept boxes in teal, common-mistake boxes in red. The colours make your second and third revision passes faster.
- 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.
- Checked 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)
Here is how the 10 Class 12 Chemistry chapters group into the CBSE units below. Each chapter's Notes PDF covers the concepts 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
NCERT has trimmed the Class 12 Chemistry 2026-27 syllabus to lower the study 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 update. 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 most of the CBSE 2026 Class 12 Chemistry paper and repeat almost every year. The first column lists the long-answer topics that come up as 3-mark and 5-mark questions. The second column lists the questions that appear as 1-3 mark numericals, MCQs and 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 almost the same question split. JEE Main leans on physical-chemistry numericals, while NEET has more inorganic-chemistry MCQs. The Expert's Solution tab on each chapter page shows the JEE / NEET-style path next to the short CBSE board-style version.
NCERT NOTES · CLASS 12 CHEMISTRY
Class 12 Chemistry - Exam Weightage
Class 12 Chemistry adds up to about 200 marks combined across CBSE Boards, JEE Main, JEE Advanced and NEET UG. That makes it the second-heaviest science load after Physics on the main senior-school 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, about 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 has five sections. Knowing the weight of each section 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 Section 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): Uses coordination chemistry, electrochemistry, or biomolecules in 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 plus the 30-mark internal assessment (practical, project, viva) makes the 100-mark scheme. Internal marks go up as your lab notebook and viva prep improve. The theory paper is where your chapter-wise NCERT prep really shows.
Where to Start with Class 12 Chemistry Notes
NCERT order is the safest reading sequence. If your window is tighter, you can reorder by weightage. The six-chapter shortlist below covers 40 of 70 board marks:
- Chapter 4, The d- and f-Block Elements (7 marks): the main inorganic chapter in the paper. Lanthanide contraction, magnetic behaviour, and oxidation-state comparison are common long-answer questions.
- Chapter 5, Coordination Compounds (7 marks): VBT, CFT, and isomerism in coordination complexes come up often in the board paper and score well on NEET.
- Chapter 1, Solutions (7 marks): colligative-properties numericals are near-sure marks. van't Hoff factor problems test both formula recall and how you use it.
- Chapter 8, Aldehydes, Ketones and Carboxylic Acids (7 marks): named reactions (Cannizzaro, aldol, Clemmensen, Wolff-Kishner) give 4-5 marks each. This is the reaction-mechanism block in organic chemistry.
- Chapter 2, Electrochemistry (6 marks): Nernst equation problems and conductance calculations are common 3-mark questions.
- Chapter 3, Chemical Kinetics (6 marks): first-order rate-constant problems and half-life calculations become easy once you practise them.
Class 12 Chemistry Notes: PDF Formats and Languages
Every chapter in the Class 12 Chemistry Notes index comes in several formats, plus a Hindi-medium version.
- HD print-ready PDF: high-resolution figures and equations, best 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 words (Rasayan Vigyan). This includes terms like विद्युत रसायन (electrochemistry), उपसहसंयोजन यौगिक (coordination compound), and जैव अणु (biomolecule).
- Combined all-chapters PDF: the whole subject's Notes as one file for offline reading.
- Handwritten counterpart: the same content in notebook style for students who prefer a 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 back-exercise practice and formula recall for a complete revision routine.
- Class 12 Chemistry NCERT Solutions: open this next to the Notes once you have read a chapter's concepts and want to check 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, handy when a Notes section points to a worked example from the chapter.
- Class 12 Chemistry Exemplar Book PDF: the NCERT Exemplar Problems book for extra practice.
How to Use the Class 12 Chemistry Notes Most Effectively
The three-pass revision routine below is the one most CBSE toppers use.
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: read every chapter's Notes once in NCERT order. Mark any concept you find unclear with a coloured tag to revisit later.
- 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 check the d-electron count against the oxidation state before you answer.
- 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 Feedback: 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, even though it carries 5 marks). Toppers flagged this as a high-value chapter to pick back up, because the diazonium salt reactions repeat every year.
- Toppers said 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. Most of it came 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. Chapters 4, 5, 7 and 8 took 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 focus in the second half.
- Mark 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 other 70% when you need a deeper read.
Class 12 Chemistry Notes FAQs
Ques. Where can I download the Class 12 Chemistry Notes PDF?
Ans. You can download every chapter-wise Class 12 Chemistry Notes PDF 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 follows the current 2026-27 syllabus. Where NCERT removed content from the older edition, the affected sections carry an inline note about 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 work best 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 comes with a Hindi-medium download next to the English version. The Hindi files use NCERT's own technical words (Rasayan Vigyan). So students preparing in Hindi medium find the same terms they have studied.
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, and focus on the high-weightage units first. 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 shows the 1-month / 2-week / 1-week countdown that most toppers use.
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