ISC Class 12 Chemistry Syllabus 2026 | Free PDF Download

The ISC Class 12 Chemistry Syllabus 2025-26 has been released officially. The Chemistry Syllabus ISC Class 12 is structured to build strong conceptual understanding and problem-solving skills. Covering Physical, Inorganic, and Organic Chemistry, the syllabus ensures that students know theoretical principles while also developing practical skills. Let’s get into the Chemistry Class 12 Syllabus ISC for the 2025-26 session.

Along with Chemistry, the ISC Biology Syllabus Class 12 covers important topics like genetics, biotechnology, human physiology, and ecology. Make sure to balance your time between both subjects, as they work together to help you better understand life sciences.

ISC Class 12 Chemistry Syllabus PDF for the Year 2025-26 – Download the Latest PDF

Since, Chemistry Class 12 Syllabus ISC has been updated. It's super important for students, parents, and teachers to get familiar with these updates. Download ISC Chemistry Syllabus 2026 from the link below and get started!

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Assessment Structure for Class 12 Chemistry Syllabus

The Chemistry Class 12 Syllabus ISC evaluates both theoretical knowledge and practical application. The exam consists of external and internal assessments:

• Paper I (Theory): 3 hours | 70 marks
• Paper II (Practical): 3 hours | 15 marks
• Project Work: 10 marks
• Practical File: 5 marks

Before we get into the detailed Chemistry Syllabus ISC Class 12, let’s break down the marking scheme and exam pattern.

a) Marking Scheme Chemistry Syllabus ISC Class 12

In ISC Chemistry Syllabus 2026, given below is how the marks are distributed across different sections:

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b) Exam Pattern Chemistry Class 12 Syllabus ISC 

In Chemistry Syllabus ISC Class 12, the theory paper is structured as follows:

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ISC Class 12 Chemistry Syllabus Detailed Breakdown

The ISC Chemistry Syllabus 2026 is divided into three sections: Physical Chemistry, Inorganic Chemistry, and Organic Chemistry.

a) Physical Chemistry (25 Marks)

1. Solutions

• Concentration of solutions (normality, molality, molarity, mole fraction, ppm)
• Solubility of gases in liquids (Henry's Law)
• Raoult's Law and azeotropic mixtures
• Colligative properties (relative lowering of vapor pressure, depression in freezing point, elevation in boiling point, osmotic pressure)
• Abnormal molecular mass, van't Hoff factor
• Applications in molecular mass determination

2. Electrochemistry

• Electrochemical cells, redox reactions
• Galvanic cells, electrode potentials
• Nernst equation and correlation with free energy
• Conductance in electrolytic solutions (specific, equivalent, molar)
• Kohlrausch's Law and Faraday's Laws of electrolysis
• Batteries (primary and secondary cells)
• Corrosion and its prevention

3. Chemical Kinetics

• Rate of reaction (average and instantaneous)
• Factors affecting reaction rates
• Law of mass action
• Order and molecularity of reactions
• Zero and first-order reactions, half-life period
• Activation energy and Arrhenius equation
• Collision theory and reaction mechanism

b) Inorganic Chemistry (14 Marks)

4. d-and f-Block Elements

• Properties of transition metals (3d, 4d, 5d series)
• Lanthanoids and actinoids (4f and 5f series)
• Potassium permanganate and potassium dichromate (structure, preparation, properties)
• Oxidizing nature in various media

5. Coordination Compounds

• Ligands and coordination number
• IUPAC nomenclature
• Isomerism (structural and stereo)
• Theories of bonding (Werner's theory, VBT, CFT)
• Magnetic properties and color
• Applications in qualitative analysis and biological systems

c) Organic Chemistry (31 Marks)

6. Haloalkanes and Haloarenes

• Nomenclature and classification
• Preparation methods
• Physical and chemical properties
• Nucleophilic substitution reactions (SN1, SN2)
• Environmental effects of dichloromethane, chloroform, etc.

7. Alcohols, Phenols and Ethers

• Classification and nomenclature
• Methods of preparation
• Physical and chemical properties
• Tests to distinguish primary, secondary, and tertiary alcohols
• Uses and applications

8. Aldehydes, Ketones and Carboxylic Acids

• Nomenclature and structure
• Preparation methods
• Nucleophilic addition reactions
• Base-catalyzed reactions (Aldol condensation, Cannizzaro's reaction)
• Tests to distinguish aldehydes and ketones
• Acidic nature of carboxylic acids
• Reactions and applications

9. Organic Compounds containing Nitrogen

• Amines (aliphatic and aromatic)
• Classification, nomenclature, and preparation
• Chemical properties and tests
• Diazonium salts and their applications
• Cyanides and isocyanides

10. Biomolecules

• Carbohydrates (monosaccharides, disaccharides, polysaccharides)
• Proteins (amino acids, peptide bonds, protein structure)
• Vitamins (classification and functions)
• Nucleic acids (DNA and RNA structure and differences)

d) Practical Work in ISC Chemistry Syllabus 2026 (15 Marks)

1. Titrations: Oxidation-reduction titrations
2. Rate of reaction: Study of factors affecting reaction rates
3. Compound identification: Testing for functional groups
4. Tests for carbohydrates and proteins
5. pH determination using indicators
6. Electrochemistry: Setting up voltaic cells
7. Qualitative analysis: Identification of single salts (specified anions and cations)

Suggested Project Topics acc to Chemistry Syllabus:

Topics included in Chemistry Class 12 Syllabus ISC amino acids, nucleic acids, carbohydrates, polymers, dyes, medicinal chemicals, forensic chemistry, environmental chemistry, and more.

Preparation Tips for Chemistry Board Exam Class 12

Scoring well in ISC Chemistry syllabus Class 12 is easy if you plan well! Here are some top tips:

1. Master the NCERT & ISC textbooks – Build conceptual clarity before solving high-level questions.
2. Solve PYQs & sample papers – Past Papers and Sample Papers helps in understanding exam patterns and improving time management.
3. Make short revision notes – Summarize formulas, key reactions, and mechanisms for quick last-minute revision.
4. Practice numerical problems daily – Chemistry has calculations, so consistent practice is a must.
5. Understand reaction mechanisms – Instead of memorizing, break down reactions step-by-step for better recall.
6. Focus on practicals – Don’t ignore experiments, as practicals and project work also hold weightage.

The ISC Chemistry Syllabus 2026 is structured to provide a deep understanding of fundamental chemical concepts. Whether you aim for a science-related career or just want to ace your board exams, this syllabus ensures you’re well-prepared. Follow the right study strategy, practice consistently, and use the recommended textbooks and PYQs for maximum success. Best of luck, future chemists!

Frequently Asked Questions

What is the structure of the ISC Class 12 Chemistry exam?

The exam is divided into two parts: Theory and Practical. The theory paper includes questions on Physical, Organic, and Inorganic Chemistry. The practical exam tests your lab skills, data recording, and interpretation.

What are the key topics in the Chemistry syllabus?

Major topics include Solid State, Solutions, Electrochemistry, Chemical Kinetics, Surface Chemistry, Haloalkanes and Haloarenes, Polymers, Biomolecules, and p-Block Elements. The syllabus also covers Organic Chemistry and Environmental Chemistry.

What types of questions are asked in the Chemistry exam?

The exam consists of a mix of objective (MCQs), short-answer, and long-answer questions. These test your understanding of concepts, formulas, and the ability to solve numerical problems related to the topics.

How can I prepare for the ISC Chemistry exam?

Focus on understanding the key concepts, especially in Organic and Physical Chemistry. Practice solving numerical problems and reviewing chemical reactions. Make sure to revise important equations and mechanisms. Solving previous years' question papers can also help you get a feel for the exam pattern.

Is there a specific marking scheme for the Chemistry exam?

Yes, the exam follows a clear marking scheme, with higher marks given to long-answer questions, particularly those involving derivations, explanations, and numerical problems. Objective questions carry fewer marks but are equally important for revising concepts.