The CBSE syllabus 2026 27 Class 12 Chemistry is one of the most important study resources for board exam students. Before starting preparation, every student should know the updated chapter-wise syllabus, marks distribution, practical work, and deleted topics.
The Chemistry syllabus for Class 12 is divided into Physical Chemistry, Organic Chemistry, and Inorganic Chemistry. The theory paper carries 70 marks, while practical examinations carry 30 marks. Therefore, students need to prepare both written and practical sections carefully.
Students who follow the latest CBSE syllabus 2026 27 Class 12 Chemistry can save time, avoid deleted topics, and focus only on important chapters.
Highlights of CBSE Syllabus 2026 27 Class 12 Chemistry
| Particulars | Details |
|---|---|
| Board | CBSE |
| Class | 12 |
| Subject | Chemistry |
| Academic Session | 2026–27 |
| Theory Marks | 70 |
| Practical Marks | 30 |
| Total Marks | 100 |
| Number of Units | 10 |
| Main Sections | Physical, Organic, Inorganic Chemistry |
| Exam Type | Annual Board Examination |
CBSE Class 12 Chemistry Course Structure 2026–27
The complete CBSE syllabus 2026 27 Class 12 Chemistry includes 10 units. Each unit has a fixed weightage in the board examination.
| Unit No. | Unit Name | Marks |
|---|---|---|
| Unit 1 | Solutions | 7 |
| Unit 2 | Electrochemistry | 9 |
| Unit 3 | Chemical Kinetics | 7 |
| Unit 4 | d- and f-Block Elements | 7 |
| Unit 5 | Coordination Compounds | 7 |
| Unit 6 | Haloalkanes and Haloarenes | 6 |
| Unit 7 | Alcohols, Phenols and Ethers | 6 |
| Unit 8 | Aldehydes, Ketones and Carboxylic Acids | 8 |
| Unit 9 | Amines | 6 |
| Unit 10 | Biomolecules | 7 |
| Total | 70 |
From the table above, it is clear that Electrochemistry carries the highest weightage. Students should spend extra time on this chapter.
Detailed CBSE Syllabus 2026 27 Class 12 Chemistry Chapter Wise
Unit 1: Solutions
This chapter explains the behaviour of solid and liquid solutions. Students learn about concentration, vapour pressure, and colligative properties.
Topics Covered in Solutions
- Types of solutions
- Expressing concentration of solutions
- Solubility of gases in liquids
- Vapour pressure of liquid solutions
- Ideal and non-ideal solutions
- Raoult’s law
- Colligative properties
- Relative lowering of vapour pressure
- Elevation in boiling point
- Depression in freezing point
- Osmotic pressure
- Determination of molecular mass
| Important Concepts | Weightage |
|---|---|
| Raoult’s Law | High |
| Colligative Properties | High |
| Osmotic Pressure | Medium |
| Numerical Problems | High |
Students should practice numerical questions from this chapter regularly because board exams often include long calculations.
Unit 2: Electrochemistry
Electrochemistry is one of the most important chapters in the CBSE syllabus 2026 27 Class 12 Chemistry. It explains the relationship between electricity and chemical reactions.
Topics Covered in Electrochemistry
- Electrochemical cells
- Galvanic cells
- Electrode potential
- Standard electrode potential
- Nernst equation
- Conductance of electrolytic solutions
- Kohlrausch’s law
- Electrolysis
- Batteries
- Fuel cells
- Corrosion
| Topic | Importance in Exam |
|---|---|
| Nernst Equation | Very High |
| Electrochemical Cell | High |
| Conductance | High |
| Batteries and Fuel Cells | Medium |
Board examinations usually ask derivations, short notes, and numericals from the Nernst equation.
Unit 3: Chemical Kinetics
Chemical Kinetics deals with the rate of chemical reactions. Students learn how temperature, concentration, and catalysts affect reaction speed.
Topics Covered in Chemical Kinetics
- Rate of a chemical reaction
- Factors affecting reaction rate
- Rate law expression
- Order of reaction
- Molecularity of reaction
- Integrated rate equations
- Half-life period
- First-order reaction
- Collision theory
- Arrhenius equation
| Important Topic | Exam Chances |
|---|---|
| Order and Molecularity | High |
| Integrated Rate Equation | Very High |
| Half-Life Formula | High |
| Arrhenius Equation | Medium |
Students should memorize formulas and solve numericals from this chapter daily.
Unit 4: d- and f-Block Elements
This chapter belongs to Inorganic Chemistry. It mainly focuses on transition metals and inner transition elements.
Topics Covered in d- and f-Block Elements
- Position in periodic table
- Electronic configuration
- General properties
- Oxidation states
- Magnetic properties
- Lanthanoids
- Actinoids
- Chemical reactivity
- Important compounds of transition metals
| Topic | Weightage |
|---|---|
| Electronic Configuration | Medium |
| Oxidation State | High |
| Lanthanoid Contraction | High |
| Magnetic Properties | Medium |
Students often find this chapter difficult because it contains many facts and exceptions. Therefore, short notes and revision charts are useful.
Unit 5: Coordination Compounds
Coordination Compounds is a scoring chapter in the CBSE syllabus 2026 27 Class 12 Chemistry. Many direct questions are asked from this unit.
Topics Covered in Coordination Compounds
- Werner’s theory
- Coordination number
- Ligands
- Nomenclature of coordination compounds
- Bonding in coordination compounds
- Isomerism
- Stability of coordination compounds
- Importance and applications
| Important Areas | Marks Probability |
|---|---|
| Nomenclature | Very High |
| Isomerism | High |
| Werner’s Theory | Medium |
| Applications | Medium |
Students should practice naming different coordination compounds because such questions are frequently asked.
Unit 6: Haloalkanes and Haloarenes
This chapter explains compounds containing halogens such as chlorine, bromine, and iodine.
Topics Covered in Haloalkanes and Haloarenes
- Classification of halo compounds
- Nomenclature
- Nature of C–X bond
- Preparation methods
- Physical and chemical properties
- Nucleophilic substitution reactions
- Elimination reactions
- Uses of halo compounds
| Topic | Importance |
|---|---|
| SN1 and SN2 Reactions | High |
| Preparation Methods | Medium |
| Haloarenes | High |
| Chemical Reactions | Very High |
Students should learn all reaction mechanisms carefully.
Unit 7: Alcohols, Phenols and Ethers
This chapter is important in Organic Chemistry because it covers preparation, properties, and uses of alcohols and phenols.
Topics Covered in Alcohols, Phenols and Ethers
- Classification
- Nomenclature
- Preparation of alcohols
- Preparation of phenols
- Properties of alcohols
- Properties of phenols
- Ethers and their preparation
- Chemical reactions
- Uses of alcohols and phenols
| Important Topic | Weightage |
|---|---|
| Reactions of Alcohols | High |
| Phenol Reactions | High |
| Preparation Methods | Medium |
| Ethers | Medium |
Students should prepare reaction charts for easy revision.
Unit 8: Aldehydes, Ketones and Carboxylic Acids
This is one of the highest-scoring chapters in the CBSE syllabus 2026 27 Class 12 Chemistry.
Topics Covered in Aldehydes, Ketones and Carboxylic Acids
- Nomenclature
- Preparation methods
- Physical properties
- Chemical reactions
- Aldol condensation
- Cannizzaro reaction
- Carboxylic acids
- Acidity of carboxylic acids
- Uses of aldehydes and ketones
| Topic | Marks Importance |
|---|---|
| Named Reactions | Very High |
| Carboxylic Acids | High |
| Aldol and Cannizzaro Reaction | Very High |
| Distinguishing Tests | High |
This chapter is very important for board exams because many reaction-based questions come from it.
Unit 9: Amines
Amines is a short but important chapter. Students can score good marks if they learn all reactions.
Topics Covered in Amines
- Classification of amines
- Nomenclature
- Preparation of amines
- Physical properties
- Chemical reactions
- Diazonium salts
- Importance of diazonium compounds
| Topic | Importance |
|---|---|
| Preparation of Amines | High |
| Diazonium Salts | Very High |
| Reactions of Amines | High |
Students should revise all name reactions from this chapter.
Unit 10: Biomolecules
Biomolecules is the final chapter in the CBSE syllabus 2026 27 Class 12 Chemistry. It is easy and highly scoring.
Topics Covered in Biomolecules
- Carbohydrates
- Proteins
- Vitamins
- Enzymes
- Nucleic acids
- DNA and RNA
| Topic | Exam Importance |
|---|---|
| Carbohydrates | Medium |
| Proteins | High |
| Vitamins | High |
| DNA and RNA | High |
Students can prepare this chapter in less time and score excellent marks.
Deleted Topics in CBSE Syllabus 2026 27 Class 12 Chemistry
Many students waste time studying removed chapters. Therefore, it is necessary to know the deleted syllabus.
| Deleted Unit | Status |
|---|---|
| Solid State | Deleted |
| Surface Chemistry | Deleted |
| General Principles and Processes of Isolation of Elements | Deleted |
| p-Block Elements | Deleted |
| Polymers | Deleted |
| Chemistry in Everyday Life | Deleted |
These deleted chapters are not included in the CBSE syllabus 2026 27 Class 12 Chemistry. Students should avoid spending time on them.
Practical Syllabus for Class 12 Chemistry 2026–27
The practical examination carries 30 marks. Students should not ignore practical work because it can improve final scores.
| Practical Component | Marks |
|---|---|
| Volumetric Analysis | 8 |
| Salt Analysis | 8 |
| Content-Based Experiment | 6 |
| Project Work | 4 |
| Class Record and Viva | 4 |
Important Experiments in Practical Chemistry
- Determination of molarity of KMnO4 solution
- Determination of pH of different samples
- Study of rate of reaction
- Identification of functional groups
- Preparation of organic compounds
- Salt analysis
Students should complete their practical notebooks before the board practical examination.
Internal Assessment and Exam Pattern
The CBSE syllabus 2026 27 Class 12 Chemistry follows a competency-based pattern.
| Question Type | Approximate Weightage |
|---|---|
| Competency-Based Questions | 50% |
| Short Answer Questions | 20% |
| Long Answer Questions | 30% |
The board now asks more application-based and case-study questions. Therefore, students should focus on concepts rather than only memorizing definitions.
Most Important Chapters for Board Exam 2026–27
Some chapters carry more marks and have higher chances of appearing in the exam.
| High Weightage Chapter | Expected Marks |
|---|---|
| Electrochemistry | 7–9 |
| Aldehydes, Ketones and Carboxylic Acids | 6–8 |
| Solutions | 5–7 |
| Chemical Kinetics | 5–7 |
| Coordination Compounds | 5–6 |
Students who want to score above 90 marks should complete these chapters first.
Best Preparation Strategy for CBSE Class 12 Chemistry
Students can easily score good marks if they follow a smart preparation strategy.
1. Complete the Syllabus Early
Try to finish the entire CBSE syllabus 2026 27 Class 12 Chemistry at least two months before the board exam.
2. Make Short Notes
Write formulas, reactions, and important points in a notebook. These notes help in quick revision.
3. Learn Organic Reactions
Organic Chemistry contains many reactions. Students should create separate reaction charts.
4. Practice Numericals Daily
Chapters such as Solutions, Electrochemistry, and Chemical Kinetics contain many numericals. Practice at least 10 questions every day.
5. Solve Previous Year Papers
Previous year question papers help students understand the paper pattern and repeated questions.
6. Revise NCERT Line by Line
Most board exam questions come directly from NCERT textbooks. Therefore, students should read NCERT carefully.
Chapter-Wise Study Time Plan
| Chapter | Suggested Study Time |
|---|---|
| Solutions | 4 Days |
| Electrochemistry | 5 Days |
| Chemical Kinetics | 3 Days |
| d- and f-Block Elements | 3 Days |
| Coordination Compounds | 4 Days |
| Haloalkanes and Haloarenes | 4 Days |
| Alcohols, Phenols and Ethers | 4 Days |
| Aldehydes, Ketones and Carboxylic Acids | 5 Days |
| Amines | 3 Days |
| Biomolecules | 2 Days |
This study plan can help students complete the CBSE syllabus 2026 27 Class 12 Chemistry within one month.
Mistakes Students Should Avoid
- Studying deleted chapters
- Ignoring NCERT examples
- Leaving practical work for the last moment
- Not revising formulas
- Avoiding previous year papers
- Spending too much time on one chapter
Students should avoid these mistakes if they want better marks.
Frequently Asked Questions
Is there any change in CBSE syllabus 2026 27 Class 12 Chemistry?
Yes, the syllabus continues with the rationalized pattern. Deleted chapters such as Solid State and Polymers are not included.
How many chapters are there in Class 12 Chemistry 2026–27?
There are 10 chapters or units in the latest Chemistry syllabus.
Which chapter has the highest weightage?
Electrochemistry has the highest weightage with 9 marks.
Are practical marks important in Chemistry?
Yes, practical work carries 30 marks. Students should prepare for experiments, viva, and project work.
Which is the easiest chapter in Class 12 Chemistry?
Biomolecules is generally considered the easiest and most scoring chapter.
