West Bengal Board Class 12 Chemistry Syllabus, 2025-26: Download PDF Below

Unit

Marks

Solid State

04 marks

Solutions

05 marks

Electrochemistry

05 marks

Chemical Kinetics

05 marks

Surface Chemistry

04 marks

General principles and processes of Isolation of Elements

03 marks

p-Block Elements

08 marks

d-and f- Block Elements

05 marks

Coordination Compounds

03 marks

Haloalkanes and Haloarenes

04 marks

Alcohols, Phenols and Ethers

04 marks

Aldehydes, Ketones and Carboxylic acids

06 marks

Organic Compounds containing Nitrogen

04 marks

Bio molecules

04 marks

Polymers

03 marks

Chemistry in Everyday Life

03 marks

Total

70

Unit

Subtopics

Solid State

- Classification: Molecular, Ionic, Covalent, Metallic solids
- Amorphous vs. Crystalline solids (elementary idea)
- Unit cell in 2D & 3D lattices
- Packing efficiency, packing in solids, voids
- Density calculation of unit cell - Number of atoms per cubic unit cell - Point defects

Solutions

- Types of solutions
- Concentration expressions
- Solubility of solids and gases in liquids
- Raoult’s Law
- Colligative properties:
• Relative lowering of vapor pressure
• Elevation of boiling point
• Depression of freezing point
• Osmotic pressure
- Molecular mass determination

Electrochemistry

- Redox reactions
- EMF of cell, standard electrode potential
- Nernst equation & applications
- Gibbs energy & EMF relation
- Conductance, specific & molar conductivity
- Conductivity vs. concentration
- Kohlrausch’s Law
- Electrolysis & laws (elementary idea)

Chemical Kinetics

- Average & instantaneous rate
- Factors: concentration, temp., catalyst
- Order & molecularity
- Rate law, rate constant
- Integrated rate equations (zero & first order) - Half-life

Surface Chemistry

- Adsorption: physisorption & chemisorption
- Factors affecting adsorption
- Colloids: multi-, macro-molecular
- Tyndall effect, Brownian movement
- Electrophoresis, coagulation

P-Block Elements

Group 15:
- Intro, electronic config, oxidation states
- Trends, preparation & uses of nitrogen
- Ammonia & nitric acid
Group 16:
- Trends, dioxygen, oxides, ozone
- Sulphur forms & SO₂, H₂SO₄, oxoacids (structures only)
Group 17:
- Trends, chlorine & HCl, interhalogens, oxoacids (structures only) Group 18:
- Trends, uses

d- and f-Block Elements

- Transition metals: config, trends, properties
- Lanthanoids: config, oxidation states
- Lanthanoid contraction & consequences

Coordination Compounds

- Introduction, ligands, coordination number
- Colour, magnetism, shapes
- IUPAC nomenclature
- Bonding: Werner’s theory, VBT, CFT

Haloalkanes and Haloarenes

- Nomenclature, C–X bond nature
- Physical & chemical properties
- Substitution mechanisms
- RS and d/l configurations
- Haloarenes: directive influence

Alcohols, Phenols, Ethers

Alcohols:
- Nomenclature, prep methods
- Properties (primary only), ID tests
- Dehydration mechanism Phenols:
- Prep, properties, acidic nature
- Electrophilic substitution, uses Ethers:
- Prep, properties, uses

Aldehydes, Ketones & Carboxylic Acids

Aldehydes/Ketones:
- Nomenclature, carbonyl group nature
- Prep methods, properties
- Nucleophilic addition mechanism
- Reactivity of alpha-H
- Uses Carboxylic Acids:
- Nomenclature, acidity
- Prep, properties, uses

Organic Compounds Containing Nitrogen

- Nitro compounds: Prep & reactions
- Amines: Nomenclature, classification, structure
- Prep methods, properties, uses
- Identification of 1°, 2°, 3° amines
- Cyanides & isocyanides (contextual mention)

Biomolecules

Carbohydrates:
- Classification: aldoses, ketoses
- Monosaccharides: glucose, fructose, D/L config Proteins:
- Alpha amino acids, peptide bond
- Protein structures (1° to 4°)
- Denaturation Nucleic Acids:
- DNA and RNA