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CBSE Class 12 · Chemistry · 2025-26

CBSE Class 12 Chemistry Syllabus 2025-26

Official chapter-wise syllabus for CBSE Class 12 Chemistry — unit-wise marks distribution, list of deleted/reduced topics, and the 2025-26 exam paper pattern. Use this page alongside the Class 12 Chemistry preparation guide for full exam readiness.

2025-26

Academic Year

Theory Marks

Practical Marks

Total Chapters

Unit-Wise Marks Distribution

54 marks (theory)

Unit I: Solutions

Solutions

9% of theory marks

Unit II: Electrochemistry

Electrochemistry

11% of theory marks

Unit III: Chemical Kinetics

Chemical Kinetics

9% of theory marks

Unit IV: d and f Block Elements

The d and f Block Elements

7% of theory marks

Unit V: Coordination Compounds

Coordination Compounds

11% of theory marks

Unit VI: Haloalkanes and Haloarenes

Haloalkanes and Haloarenes

7% of theory marks

Unit VII: Alcohols, Phenols and Ethers

Alcohols, Phenols and Ethers

7% of theory marks

Unit VIII: Aldehydes, Ketones and Carboxylic Acids

Aldehydes, Ketones and Carboxylic Acids

11% of theory marks

Unit IX: Amines

Amines

7% of theory marks

Unit X: Biomolecules

Biomolecules

7% of theory marks

Unit XI: Polymers

Polymers

6% of theory marks

Unit XII: Chemistry in Everyday Life

Chemistry in Everyday Life

6% of theory marks

Chapter-Wise Syllabus

14 chapters

#	Chapter	Marks	Key Topics
1	Solid State	4	Types of Solids · Crystal Systems · Defects · Electrical & Magnetic Properties
2	Solutions	5	Raoult's Law · Colligative Properties · van't Hoff Factor
3	Electrochemistry	5	Nernst Equation · Kohlrausch Law · Electrolysis · Fuel Cells
4	Chemical Kinetics	5	Rate Laws · Order of Reaction · Arrhenius Equation · Half Life
5	Surface Chemistry	4	Adsorption · Catalysis · Colloids · Emulsions
6	General Principles of Isolation	3	Metallurgy · Refining Methods
7	p-Block Elements	8	Group 15, 16, 17, 18 · Structures · Preparation & Properties
8	d & f Block Elements	5	Transition Metals · Lanthanoids & Actinoids · Complex Compounds
9	Coordination Compounds	3	Werner Theory · IUPAC Nomenclature · Isomerism · VBT
10	Haloalkanes & Haloarenes	4	SN1, SN2 Reactions · Elimination · Haloarene Properties
11	Alcohols, Phenols & Ethers	4	Preparation · Properties · Reactions of Phenol
12	Aldehydes, Ketones & Carboxylic Acids	6	Nucleophilic Addition · Aldol Condensation · Cannizzaro Reaction
13	Amines & Biomolecules	5	Basicity · Diazonium Salts · Proteins · Nucleic Acids
14	Polymers & Chemistry in Everyday Life	4	Classification · Preparation · Drug-Receptor Interaction

Deleted / Reduced Topics 2025-26

Note: The following topics have been deleted or reduced from the CBSE Class 12 Chemistry syllabus. Do not spend time studying these for the 2025-26 board exam. Always verify with the official CBSE syllabus document before your exam.

✗

Solutions

Abnormal molar masses — van't Hoff factor derivation proof

✗

Surface Chemistry

Entire chapter removed from board exam

✗

General Principles and Processes of Isolation of Elements

Entire chapter removed

✗

p-Block Elements

Entire chapter removed from Class 12 (moved to Class 11)

Exam Paper Pattern 2025-26

70 marks total

Section	Question Type	Marks/Q	Count	Total
Section A	MCQ / Assertion-Reason	1	16	16
Section B	Very Short Answer (VSA)	2	5	10
Section C	Short Answer (SA)	3	7	21
Section D	Long Answer (LA)	5	3	15
Section E	Case Study / Source Based	4	2	8
Total Theory Marks				70

Practical / Internal Assessment Marks — assessed throughout the year by your school (projects, lab work, notebooks).

How to Use This Syllabus

Prioritise by marks

Use the unit-wise distribution above. Focus first on units with 20+ marks — they give the best return on study time.

Skip deleted topics

CBSE will not ask deleted topics in the board exam. Don't waste time on them — use that time for NCERT exercises instead.

Know the paper pattern

Section E (Case Study) has new-format questions many students ignore. Practise these separately — they're easy marks.

From syllabus to practice

You know the syllabus. Now practise it.

ClearSteps gives you chapter-wise mock tests aligned to the exact CBSE Class 12 Chemistry syllabus, with AI evaluation against the official marking scheme.

Start Practising Free →View Preparation Guide