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Bihar Board Class 12 Chemistry Syllabus 2025-26: Check Chapter-Wise Weightage, Practical Syllabus PDF, and Previous Year Questions
The Bihar Board Class 12 Chemistry Syllabus has been officially issued by BSEB. This article includes the entire syllabus, chapter-wise weightage, and exam pattern of the Class 12 Chemistry subject.
- The syllabus for the academic year 2025-26 covers 16 chapters, including Solid State, Solutions, Electrochemistry, Chemical Kinetics, p-block elements, d- and f-block elements, and biomolecules.
- The chapters on p-block elements, as well as aldehydes, ketones, and carboxylic acids, are the most important.
- The chemistry test has a total of 100 marks, with 70 for theory and 30 for practicals. To qualify, students must get at least 33 out of 100 marks.
- The Bihar Board Class 12 Chemistry exam will be given on February 6, 2026.
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Key Summary
- In this article, we have discussed the Bihar Board Class 12 chemistry syllabus, which includes the chapter-wise syllabus, weightage, exam pattern, and previous year questions:
- The Bihar Board Class 12 Chemistry syllabus for 2025–26 consists of 16 chapters covering physical, organic, and inorganic chemistry.
- The exam is of 100 marks, divided into 70 marks theory and 30 marks practicals, with 33 marks as the minimum passing requirement.
- The question paper includes a mix of MCQs, short answer, and long answer questions.
- The practical syllabus focuses on volumetric analysis, salt analysis, organic preparation, and experiments.
- Students are advised to prepare from NCERT Chemistry Parts I & II and the Chemistry Lab Manual.
- Practicing previous year papers helps in understanding the pattern and frequently asked questions.
- Bihar Board Class 12 Chemistry Syllabus 2025-26
- Bihar Board Class 12 Chemistry Exam Pattern 2025-26
- Bihar Board Class 12 Chemistry Syllabus : Chapter-Wise Weightage
- Bihar Board Class 12 Chemistry Syllabus 2025-26: Practical Syllabus PDF
- Class 12 Chemistry Practical Weightage
- Bihar Board Class 12 Chemistry Syllabus: Important Books
- Bihar Board Class 12 Chemistry Syllabus: Previous Year Question Paper
- Bihar Board Class 12 Chemistry Syllabus: Preparation Tips
- FAQs
Bihar Board Class 12 Chemistry Syllabus 2025-26
The Bihar School Examination Board (BSEB) released the Bihar Board Class 12 Chemistry Syllabus for the academic year 2025–26.
- This syllabus is designed to offer students a thorough understanding of ideas in physical, organic, and inorganic chemistry, as well as practical experiments to help them improve their application abilities.
- It covers 16 critical chapters and emphasises chapter-specific weightage, exam patterns, and significant themes for board exams.
- The syllabus not only prepares students to perform well in Bihar Board exams, but it also provides a solid foundation for competitive tests such as JEE and NEET.
The Bihar Board class 12 chemistry syllabus is given below with unit-wise information:
| Unit | Chapter/Topics |
|---|---|
| Unit 1: Solid State | Classification based on binding forces; crystalline & amorphous solids; unit cell (2D & 3D lattices, density, packing, voids, atoms per cell, point defects); Band theory—metals, conductors, semiconductors & insulators; n- & p-type semiconductors |
| Unit 2: Solutions | Types of solutions; concentration terms; osmosis & osmotic pressure; colligative properties & molar mass determination; abnormal molecular mass; vapor pressure; depression of freezing point |
| Unit 3: Electrochemistry | Redox reactions; electrolytic cells & electrolysis; galvanic cells, dry cells, EMF of a cell; Nernst equations & applications; Kohlrausch’s Law; Corrosion; Fuel cells |
| Unit 4: Chemical Kinetics | Rate of reaction, factors affecting rate, temperature dependence; order & molecularity; Rate law, specific rate constant, half-life, collision theory, activation energy, Arrhenius equation |
| Unit 5: Surface Chemistry | Adsorption & factors affecting it; Catalysis (homogeneous & heterogeneous, enzyme catalysis); Colloids (true solution vs colloids vs suspension); Preparation; Properties (Tyndall effect, Brownian movement, electrophoresis, coagulation); Emulsions |
| Unit 6: General Principles & Processes of Isolation of Elements | Extraction principles & methods; oxidation-reduction; electrolytic method & refining; extraction of Al, Cu, Zn, Fe |
| Unit 7: p-block Elements | Group 15: Nitrogen & Phosphorus (occurrence, properties, compounds, ammonia, nitric acid, oxides, phosphine, PCl₃, PCl₅, oxoacids)Group 16: Dioxygen, oxides, ozone, sulphur (allotropes, SO₂, H₂SO₄, oxoacids)Group 17: Halogens, chlorine, HCl, interhalogen compounds, oxoacidsGroup 18: Noble gases – occurrence, properties |
| Unit 8: d & f-block Elements | Transition metals—characteristics & occurrence; Potassium dichromate & permanganate; lanthanoids (electronic configuration, contraction); actinoids (electronic configuration, oxidation states) |
| Unit 9: Coordination Compounds | IUPAC nomenclature; bonding in metal carbonyls; Werner’s theory; VBT & CFT; structure & isomerism; importance of coordination compounds |
| Unit 10: Haloalkanes & Haloarenes | Classification, nomenclature, properties, substitution reactions; Uses & environmental effects (CH₂Cl₂, CHCl₃, CCl₄, iodoform, freons, DDT) |
| Unit 11: Alcohols, Phenols & Ethers | Alcohols: Prep, properties, identification (1°, 2°, 3°), dehydration mechanism, usesPhenols: Prep, acidic nature, electrophilic substitution, usesEthers: Prep, properties, uses |
| Unit 12: Aldehydes, Ketones & Carboxylic Acids | Aldehydes & Ketones: Prep, properties, and nucleophilic addition reactionsCarboxylic acids: Prep, acidic nature, properties, uses |
| Unit 13: Organic Compounds Containing Nitrogen | Amines (classification, prep, properties, uses, identification); cyanides & isocyanides (prep, properties, uses); diazonium salts (prep, properties, applications) |
| Unit 14: Biomolecules | Carbohydrates (classification, uses); Proteins (structure, peptide bond, denaturation, enzymes); Vitamins (classification, functions); Nucleic acids (DNA & RNA) |
| Unit 15: Polymers | Classification; Polymerization & copolymerization; Natural & synthetic polymers; Biodegradable & non-biodegradable polymers |
| Unit 16: Chemistry in Everyday Life | Chemicals in foods; drugs (classification, antiseptics, disinfectants, antibiotics, antacids, antihistamines, antifertility drugs); Preservatives & artificial sweeteners; Soaps & detergents (cleansing action) |
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Bihar Board Class 12 Mathematics SyllabusBihar Board Class 12 Chemistry Exam Pattern 2025-26
The chemistry exam of the Bihar Board Class 12 will have both objective (MCQs) and subjective questions. The paper is set for 100 marks, including 70 marks for theory and 30 marks for practicals.
The question paper pattern for the class 12 chemistry subject is given below:
| Type of Questions | Total Questions | To Attempt | Marks Each |
|---|---|---|---|
| MCQs | 42 | 35 | 1 * 35 = 35 |
| Short Answer | 18 | 10 | 2 * 10 = 20 |
| Long Answer | 6 | 3 | 5 * 3 = 15 |
Bihar Board Class 12 Chemistry Syllabus : Chapter-Wise Weightage
The detailed chapter-wise marks distribution is given below. Each chapter in chemistry carries a different weightage in the board exam.
The most important units are p-Block Elements and Aldehydes, Ketones & Carboxylic Acids, followed by chapters like Solutions and Chemical Kinetics.
| Chapter | Marks Weightage |
|---|---|
| The Solid State | 4 |
| Solutions | 5 |
| Electrochemistry | 5 |
| Chemical Kinetics | 5 |
| Surface Chemistry | 4 |
| General Principles and Processes of Isolation of Elements | 3 |
| The p-Block Elements | 8 |
| The d- and f-Block Elements | 5 |
| Coordination Compounds | 3 |
| Haloalkanes and Haloarenes | 4 |
| Alcohols, Phenols, and Ethers | 4 |
| Aldehydes, Ketones, and Carboxylic Acids | 6 |
| Organic Compounds Containing Nitrogen | 4 |
| Biomolecules | 4 |
| Polymers | 3 |
| Chemistry in Everyday Life | 3 |
| Total | 70 |
Bihar Board Class 12 Chemistry Syllabus 2025-26: Practical Syllabus PDF
The chemistry practical syllabus for the Bihar Board Class 12 was developed to improve students' experimental skills and grasp of academic ideas.
- The practical syllabus includes volumetric analysis, qualitative salt analysis, organic compound synthesis, and the study of physical properties such as pH, solubility, and kinetics.
- Practical work is worth 30 marks, making it a significant portion of the exam.
- These experiments assist students in improving their accuracy, observational abilities, and application-based learning.
- Students can download the Class 12 Chemistry syllabus pdf by clicking on the below link.
Class 12 Chemistry Practical Weightage
The Bihar Board Class 12 Chemistry practical exam consists of 30 marks. To achieve high grades, students must meticulously rehearse each area.
The exam is divided into various components such as volumetric analysis, salt analysis, organic preparation, physical experiments, viva, and record work. Detailed weightage is given below in the tabular format:
| Section | Marks |
|---|---|
| 1. Volumetric Analysis | 08 |
| 2. Salt Analysis (Qualitative Analysis) | 08 |
| 3. Preparation of Organic Compounds | 05 |
| 4. Physical Chemistry Experiments | 04 |
| 5. Viva Voce | 03 |
| 6. Record Work / Project Work | 02 |
| Total | 30 |
Bihar Board Class 12 Chemistry Syllabus: Important Books
The most important resources for Bihar Board Class 12 Chemistry are NCERT books, which cover the whole syllabus recommended by the BSEB.
These books include clear explanations, solved examples, and exercises to help students prepare efficiently for both board exams and competitive exams such as JEE and NEET. Students should prepare from the prescribed NCERT books as recommended by the board:
- Chemistry Part I, Class XII (NCERT)
- Chemistry Part II, Class XII (NCERT)
- Chemistry Lab Manual, Class XII (NCERT)
Also Read
Bihar Board Class 12 BooksBihar Board Class 12 Chemistry Syllabus: Previous Year Question Paper
The previous year’s Bihar Board Class 12 Chemistry question papers are a valuable resource for exam preparation.
- They help students understand the exam design, marking scheme, and the types of questions that are usually asked.
- Practising these papers increases time management, confidence, and problem-solving abilities, making them a crucial tool for success on the board examination.
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Class 12 Chemistry Answer KeyBihar Board Class 12 Chemistry Syllabus: Preparation Tips
Preparing for the Bihar Board Class 12 Chemistry involves a well-thought-out approach as well as constant practice.
The table below summarises some useful preparatory tips where students can focus on understanding concepts, practising numericals, and revising reactions regularly.
| Tip | Details |
|---|---|
| Understand the Syllabus | Go through the complete syllabus and mark important topics from the NCERT. Focus on units with high weightage. |
| Make a Study Schedule | Study chemistry daily for at least 1.5–2 hours. Divide time between physical, organic, and inorganic chemistry. |
| Focus on NCERT | Read the NCERT line by line, as most questions are directly based on it. Highlight formulas, reactions, and definitions. |
| Practice Numericals | Solve numerical problems from physical chemistry (electrochemistry, solutions, kinetics, solid state). |
| Revise Reactions & Mechanisms | Write and revise important organic reactions, mechanisms, and named reactions separately for quick recall. |
| Prepare Notes & Charts | Make short notes, flowcharts, and tables for inorganic properties, equations, and important exceptions. |
| Solve Previous Papers | Practice the last 5–10 years’ question papers and model sets to understand exam patterns and repeated questions. |
| Revise Regularly | Keep the last 15–20 days for revision only. Revise formulas, key reactions, and important definitions daily. |
FAQs
Ques. What is the syllabus of Chemistry Class 12, Bihar Board?
Ans. The Bihar Board Class 12 Chemistry syllabus for 2025–26 consists of 16 units covering physical, organic, and inorganic chemistry along with their marks weightage in the table below:
| Unit No. | Chapter / Unit Name | Marks Weightage |
|---|---|---|
| 1 | Solid State | 4 |
| 2 | Solutions | 5 |
| 3 | Electrochemistry | 5 |
| 4 | Chemical Kinetics | 5 |
| 5 | Surface Chemistry | 4 |
| 6 | General Principles and Processes of Isolation of Elements | 3 |
| 7 | The p-Block Element | 8 |
| 8 | The d-Block Element | 5 |
| 9 | The f-Block Element | 3 |
| 10 | Coordination Compounds | 4 |
| 11 | Haloalkanes and Haloarenes | 4 |
| 12 | Alcohols, Phenols, and Ethers | 6 |
| 13 | Aldehydes, Ketones, and Carboxylic Acids | 4 |
| 14 | Amines | 4 |
| 15 | Biomolecules | 3 |
| 16 | Polymers | 3 |
Ques. What is the syllabus of chemistry for Class 12?
Ans. The Class 12 syllabus is divided into three parts:
- Physical Chemistry – Solid State, Solutions, Electrochemistry, Chemical Kinetics, Surface Chemistry
- Inorganic Chemistry – Isolation of Elements, p-block, d- and f-block, Coordination Compounds
- Organic Chemistry – Haloalkanes, Alcohols, Aldehydes, Carboxylic Acids, Amines, Biomolecules, Polymers, Chemistry in Everyday Life
Ques. What is the syllabus of English in the Bihar Board Class 12?
Ans. The Bihar Board Class 12 English syllabus includes:
- Prose (short stories, essays, and articles from the textbook)
- Poetry (selected poems by famous poets)
- Play/Drama (one-act plays)
- Grammar & Writing (essay, letter, précis, report, comprehension, unseen passages, note making)
Ques. How many chapters are in Organic Chemistry Class 12, Bihar Board?
Ans. There are 6 chapters in Organic Chemistry for the Bihar Board Class 12 syllabus:
- Haloalkanes and Haloarenes
- Alcohols, Phenols, and Ethers
- Aldehydes, Ketones, and Carboxylic Acids
- Organic Compounds Containing Nitrogen
- Biomolecules
- Polymers
Ques. What are the most important chapters of Chemistry Class 12, Bihar Board?
Ans. The most important chapters (high weightage) are:
- p-Block Elements (8 marks)
- Aldehydes, Ketones, and Carboxylic Acids (6 marks)
- Solutions, Electrochemistry, Chemical Kinetics, and d- & f-Block Elements (5 marks each)
Ques. How many chapters are in +2 Chemistry (Class 12)?
Ans. The Bihar Board Class 12 Chemistry syllabus consists of a total of 16 chapters.
These chapters are divided into 3 sections: physical chemistry, inorganic chemistry, and organic chemistry.
| Unit No. | Chapter / Unit Name |
|---|---|
| 1 | Solid State |
| 2 | Solutions |
| 3 | Electrochemistry |
| 4 | Chemical Kinetics |
| 5 | Surface Chemistry |
| 6 | General Principles and Processes of Isolation of Elements |
| 7 | The p-Block Element |
| 8 | The d-Block Element |
| 9 | The f-Block Element |
| 10 | Coordination Compounds |
| 11 | Haloalkanes and Haloarenes |
| 12 | Alcohols, Phenols, and Ethers |
| 13 | Aldehydes, Ketones, and Carboxylic Acids |
| 14 | Amines |
| 15 | Biomolecules |
| 16 | Polymers |
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