CBSE Class 12 Chemistry Syllabus 2025–26 | Units, Chapters & Marks Distribution
Table of Contents
CBSE Class 12 Chemistry Syllabus 2025–26 | Complete Guide for Board Exam 2026
If you are preparing for the CBSE Class 12 board exam 2026, knowing the latest Chemistry syllabus (Code 043) is very important. CBSE has clearly divided the subject into theory (70 marks) and practical/internal assessment (30 marks), making a total of 100 marks.
The theory part includes 10 important units, all of which will be asked in the 2026 board exam.
This article explains the syllabus in simple language so every student can understand what to study and how much to focus on each unit.
CBSE Class 12 Chemistry Marks Distribution (2025–26)
| Component | Marks |
|---|---|
| Theory Exam | 70 Marks |
| Practical / Internal Assessment | 30 Marks |
| Total | 100 Marks |
CBSE Class 12 Chemistry Units & Marks (Theory – 70 Marks)
| Unit No. | Unit Name | Marks |
|---|---|---|
| 1 | Solutions | 7 |
| 2 | Electrochemistry | 9 |
| 3 | Chemical Kinetics | 7 |
| 4 | d- and f-Block Elements | 7 |
| 5 | Coordination Compounds | 7 |
| 6 | Haloalkanes and Haloarenes | 6 |
| 7 | Alcohols, Phenols and Ethers | 6 |
| 8 | Aldehydes, Ketones and Carboxylic Acids | 8 |
| 9 | Amines | 6 |
| 10 | Biomolecules | 7 |
Unit-Wise Topics Explained Simply
Unit 1: Solutions (7 Marks)
-
Types of solutions
-
Concentration methods
-
Raoult’s law
-
Colligative properties
-
Van’t Hoff factor & abnormal molar mass
Unit 2: Electrochemistry (9 Marks – High Weightage)
-
Electrochemical cells & EMF
-
Nernst equation
-
Gibbs energy relation
-
Conductance & Kohlrausch’s law
-
Electrolysis, batteries, fuel cells & corrosion
Unit 3: Chemical Kinetics (7 Marks)
-
Rate of reaction
-
Order & molecularity
-
Rate law & half-life
-
Arrhenius equation & activation energy
Unit 4: d- and f-Block Elements (7 Marks)
-
Properties of transition elements
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Oxidation states, colour, magnetism
-
Potassium dichromate & potassium permanganate
-
Lanthanoids & actinoids
Unit 5: Coordination Compounds (7 Marks)
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Ligands & coordination number
-
IUPAC naming
-
Werner’s theory
-
VBT & basic CFT
-
Isomerism
Unit 6: Haloalkanes & Haloarenes (6 Marks)
-
Nomenclature & properties
-
SN1 & SN2 reactions
-
Environmental effects of freons, DDT, etc.
Unit 7: Alcohols, Phenols & Ethers (6 Marks)
-
Preparation & properties
-
Identification of alcohol types
-
Phenol reactions
-
Uses of methanol & ethanol
Unit 8: Aldehydes, Ketones & Carboxylic Acids (8 Marks)
-
Carbonyl compounds
-
Nucleophilic addition
-
Acidity of carboxylic acids
-
Uses & reactions
Unit 9: Amines (6 Marks)
-
Classification
-
Basicity
-
Diazotization reactions
-
Uses
Unit 10: Biomolecules (7 Marks)
-
Carbohydrates
-
Proteins & enzymes
-
Vitamins
-
DNA, RNA & hormones
Practical & Internal Assessment (30 Marks)
The practical exam is very scoring and includes:
| Component |
|---|
| Chemistry experiments |
| Salt analysis |
| Project / activities |
| Practical record file |
| Viva voce |
Best Units to Focus More (For High Scores)
-
Electrochemistry
-
Aldehydes, Ketones & Carboxylic Acids
-
Coordination Compounds
-
Biomolecules
-
Solutions
Why This Syllabus Is Important
Knowing the CBSE Class 12 Chemistry syllabus 2025–26 helps students:
- Make a smart study plan
- Focus on high-weightage chapters
- Prepare for theory + practical properly
- Score 80+ easily in Chemistry
Simple Study Tips for Class 12 Chemistry
-
Revise formulas daily
-
Practice numericals from Units 1–3
-
Learn named reactions
-
Prepare diagrams & mechanisms
-
Complete practical files early
Final Words
The CBSE Class 12 Chemistry syllabus 2025–26 (Code 043) is balanced between physical, organic, and inorganic chemistry. With proper planning and concept clarity, Chemistry can become one of your highest-scoring subjects in the board exam.
Click Here to Know More about CBSE Class 12 Physics Syllabus 2025-26 | Units, Chapters, Marks & Practical Details: https://dekhocampus.com/news/cbse-class-12-physics-syllabus-2025-26
FAQs (Frequently Asked Questions)
Yes, the complete 10-unit syllabus is included for CBSE Class 12 Chemistry 2025–26.
Yes, most chapters from the CBSE Class 12 Chemistry syllabus are also important for JEE Main, NEET, and other competitive exams.
You can download it from the official CBSE academic website or trusted education portals.
Yes, the 30 practical marks are added to the 70 theory marks to calculate the final score.
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