WBCHSE Class 12 Chemistry Syllabus: Category Wise Distribution

The West Bengal Council of Higher Secondary Education, or WBCHSE as it is more commonly known, has established the Class 12 Chemistry Syllabus for the West Bengal State Board. The board was founded and granted autonomy in 1975. It works to advance and develop a uniform, reasonably priced higher secondary education in West Bengal state territory.

The West Bengal Council of Higher Secondary Education’s (WBCHSE) Class 12 Chemistry curriculum is a thorough and organized course of study that aims to give students a firm grasp of various chemical concepts and principles.

The WBCHSE Class 12 Chemistry syllabus covers important topics like Organic Chemistry, Inorganic Chemistry, and Physical Chemistry. Fundamental ideas like chemical reactions, atomic structure, bonds, thermodynamics, equilibrium, and more will be studied by the students. Advanced topics like biomolecules, polymers, and environmental chemistry are also covered in the syllabus, allowing students to gain a deeper understanding of the subject’s many facets.

WBCHSE Class 12 Chemistry Syllabus

Unit NameTopics
Solid StateClassification of Solids based on binding forces, Molecular, Ionic, Covalent, and Metallic Solids, Amorphous and Crystalline Solids, Unit Cell, Packing Efficiency, Point Defects
SolutionsTypes of Solutions, Concentration Expression, Solubility of Gases in Liquids, Solid Solutions, Raoult’s Law, Colligative Properties, Determination of Molecular Mass using Colligative Properties
ElectrochemistryRedox Reactions, EMF of Cell, Standard and Electrode Potential, Nernst Equation and its Application, Conductance in Electrolytic Solutions, Kohlrausch’s Law, Electrolysis and Laws of Electrolysis
Chemical KineticsRate of Reaction, Factors Affecting Rate of Reaction, Order and Molecularity of a Reaction, Rate Law, Integrated Rate Equations and Half-life
Surface ChemistryAdsorption, Physisorption and Chemisorption, Colloidal State, Distinction between True Solutions and Colloids, Tyndall Effect, Brownian Movement, Electrophoresis, Coagulation
P-Block ElementsGroup 15 Elements: Nitrogen, Preparation and Properties of Ammonia and Nitric Acid; Group 16 Elements: Oxygen, Ozone, Sulfur, Preparation and Properties of Sulfur Dioxide and Sulfuric Acid;

Group 17 Elements: Chlorine, Hydrochloric Acid, Interhalogen Compounds, Oxyacids of Halogens
d- and f-Block ElementsTransition Metals, Lanthanoids: Electronic Configuration, Oxidation States, Lanthanoid Contraction;

Coordination Compounds, Ligands, Coordination Number, Color, Magnetic Properties, Shape
Haloalkanes and HaloarenesNomenclature, Nature of C-X Bond, Physical and Chemical Properties, Substitution Reactions
Alcohols, Phenols, and EthersAlcohols: Nomenclature, Methods of Preparation, Physical and Chemical Properties, Identification, Mechanism of Dehydration;

Phenols: Nomenclature, Methods of Preparation, Physical and Chemical Properties, Uses;

Ethers: Nomenclature, Methods of Preparation, Physical and Chemical Properties, Uses
Aldehydes, Ketones, and Carboxylic AcidsAldehydes and Ketones: Nomenclature, Nature of Carbonyl Group, Methods of Preparation, Physical and Chemical Properties, Mechanism of Nucleophilic Addition;

Carboxylic Acids: Nomenclature, Methods of Preparation, Physical and Chemical Properties, Uses
Organic Compounds Containing NitrogenNitro Compounds: General Methods of Preparation and Chemical Reactions;

Amines: Nomenclature, Classification, Structure, Methods of Preparation, Physical and Chemical Properties, Identification;

Cyanides and Isocyanides
Bio MoleculesCarbohydrates: Classification, Monosaccharides (Glucose and Fructose), Structure;

Proteins: Alpha Amino Acids, Peptide Bond, Polypeptides, Protein Structure (Primary, Secondary, Tertiary, Quaternary), Denaturation;

Nucleic Acids: DNA and RNA

WBCHSE Class 12 Chemistry Mark Distribution

Unit NameMarks
Solid State*04
Chemical Kinetics*10
Surface Chemistry*07
p-Block Elements*08
d- and f- Block Elements*01
Coordination Compounds*04
Haloalkanes and Haloarenes*04
Alcohols, Phenols and Ethers*04
Aldehydes, Ketones and Carboxylic acids10
Organic Compounds containing Nitrogen*04
Bio molecules*03

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WBCHSE Class 12 Chemistry Practical Syllabus

Surface Chemistry:

  • Perform the preparation of a lyophilic sol using substances like starch, albumin, or gum. Also, prepare a lyophobic sol using materials such as aluminum hydroxide, ferric hydroxide, or arsenious sulphide.
  • Investigate the role of emulsifying agents in stabilizing emulsions of different oils.

Chemical Kinetics:

  • Analyze the effect of concentration and temperature on the rate of reaction between sodium thiosulphate and hydrochloric acid.
  • Explore the reaction rates of specific reactions, such as the reaction of iodide ions with hydrogen peroxide at room temperature using different concentrations of iodide ions, or the reaction between potassium iodide (KIO3) and sodium sulphate (Na2SO3) with starch solution as an indicator (known as the clock reaction).

Thermochemistry: Choose one of the following experiments:

  • Determine the enthalpy of dissolution of copper sulphate or potassium nitrate.
  • Measure the enthalpy of neutralization for the reaction between a strong acid (HCl) and a strong base (NaOH).
  • Investigate the enthalpy change during the interaction (hydrogen bond formation) between acetone and chloroform.


  • Observe the variation of cell potential in a Zn/Zn2+//Cu2+/Cu system with changes in the concentration of electrolytes (such as CuSO4 or ZnSO4) at room temperature.


  • Perform the separation of pigments from extracts of leaves and flowers using paper chromatography and determine the Rf values.
  • Separate constituents present in an inorganic mixture containing two cations with significantly different Rf values.

Preparation of Inorganic Compounds:

  • Prepare the double salt of ferrous ammonium sulphate or potash alum.
  • Conduct the synthesis of potassium ferric oxalate.

Preparation of Organic Compounds: Choose any two of the following compounds:

  • Synthesize acetanilide.
  • Prepare di benzal acetone.
  • Produce p-Nitroacetanilide.
  • Create aniline yellow or 2-Naphthalene aniline dye.
  • Generate iodoform.

Tests for Functional Groups in Organic Compounds:

  • Perform characteristic tests for the identification of unsaturation, alcoholic, phenolic, aldehydic, ketonic, carboxylic, and amino (primary) groups.
  • Conduct specific tests to detect carbohydrates, fats, and proteins in pure samples and determine their presence in given food items.

Qualitative Analysis:

  • Conduct qualitative analysis to determine one cation and one anion in a given salt.
  • Cations: Pb2+, Cu2+, As3+, Al3+, Fe3+, Mn2+, Ni2+, Zn2+, Co2+, Ca2+, Sr2+, Ba2+, Mg2+, NH4+
  • Anions: CO32-, S2-, SO32-, NO2-, Cl-, Br-, I-, PO43-, C2O42-, CH3COO- (Insoluble salts excluded)

Project Work (feasibility-dependent):

  • Prepare models.
  • Conduct an investigatory project.
  • Create science exhibits.
  • Participate in science fairs.
  • Test the purity of food articles such as butter, pulses, and milk.

Mark distribution for Class 12 Chemistry Practical

Volumetric Analysis10
Salt Analysis08
Content Based Experiment06
Class Record, Viva, and Project Work06

How to prepare for Class 12 Chemistry Syllabus?

  • It is essential to go over the material in the prescribed textbook in order to succeed in the West Bengal Board Class 12 Chemistry subject. Students can develop a solid knowledge base by carefully studying the chapters and ideas presented in the West Bengal Board Class 12 Chemistry Book. Additionally, students can use the West Bengal Board Class 12 Chemistry Solutions to improve their comprehension and problem-solving abilities.
  • It is highly advised for students to complete the West Bengal 12th Model Chemistry Paper once the syllabus is finished, and they are certain of their understanding of the subject. These sample exams allow students to become accustomed to the format and degree of difficulty of the real board exams as well as the question types and time constraints. Students can evaluate their level of preparation by attempting these sample papers and can pinpoint areas that still need work.
  • Last but not least, students should adhere to the Class 12 West Bengal Board Routine and make sure they are well-prepared to take the Chemistry paper on the scheduled date. Students can better manage their time and keep a constant level of focus while studying for exams by sticking to the routine and maintaining a disciplined study schedule. Students can increase their chances of passing the Chemistry section of the West Bengal Board Class 12 exams by carefully following these instructions.

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Frequently Asked Questions

1. How should I prepare for the Class 12 Chemistry syllabus?

Understanding the concepts presented in the recommended textbook is essential to preparing for the Class 12 Chemistry syllabus. To improve comprehension and problem-solving abilities, use the West Bengal Board Class 12 Chemistry book and the West Bengal Board Class 12 Chemistry Solutions. Additionally, to become familiar with the format and level of the exam, practice with the West Bengal 12th Model Chemistry Paper.

2. What practical experiments are included in the Class 12 Chemistry syllabus?

The class 12 chemistry practical syllabus includes experiments in surface chemistry, chemical kinetics, thermochemistry, electrochemistry, chromatography, preparation of inorganic and organic compounds, tests for functional groups in organic compounds, qualitative analysis, and project work.
These experiments entail procedures like the preparation of sols, the analysis of reaction rates, the measurement of enthalpies, chromatographic separations, and qualitative salt analysis.

3. How can I stick to a study routine and manage time effectively?

It is essential to adhere to a study schedule and effectively manage your time by using the Class 12 West Bengal Board Routine, which the board has provided. Set aside specific study times for each subject, including Chemistry, and establish a structured study schedule. Set important topics in order of importance and allot enough time for revision. Review your progress frequently, and change your routine as necessary.
When studying, keep your attention focused and avoid outside distractions.

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