The Bihar School Examination Board (BSEB) has officially released the Bihar Board Class 12 Science Syllabus 2025-26 for students appearing in the upcoming intermediate exams. The Science stream is one of the most popular choices among students who wish to pursue careers in engineering, medical, research, or technology. Having a clear understanding of the syllabus not only helps in effective preparation but also ensures that students focus on important topics according to the board guidelines.
In this blog, you will find a complete subject-wise and chapter-wise breakdown of the Class 12 Science syllabus for the Bihar Board, along with helpful insights and preparation tips.
Bihar Board Class 12 Science Syllabus 2025-26 – Complete Subject-wise Details
Subjects in Bihar Board Class 12 Science Stream
The Science stream in Class 12 generally consists of the following major subjects:
-
Physics
-
Chemistry
-
Biology (For PCB students)
-
Mathematics (For PCM students)
-
English
-
Hindi or any other elective language subject
-
Additional Subject (optional)
Bihar Board Class 12 Science Syllabus 2025-26 – Subject & Chapter-wise
1. Physics
Physics is divided into two parts: Part I (Electrostatics, Magnetism, Optics) and Part II (Modern Physics, Electronics, Communication).
Unit-wise Syllabus:
-
Electrostatics
-
Electric charges and fields
-
Electrostatic potential and capacitance
-
-
Current Electricity
-
Magnetic Effects of Current and Magnetism
-
Moving charges and magnetism
-
Magnetism and matter
-
-
Electromagnetic Induction and Alternating Currents
-
Electromagnetic Waves
-
Optics
-
Ray optics and optical instruments
-
Wave optics
-
-
Dual Nature of Radiation and Matter
-
Atoms and Nuclei
-
Electronic Devices
-
Communication Systems
2. Chemistry
Chemistry is divided into Physical Chemistry, Inorganic Chemistry, and Organic Chemistry.
Unit-wise Syllabus:
-
Solid State
-
Solutions
-
Electrochemistry
-
Chemical Kinetics
-
Surface Chemistry
-
General Principles and Processes of Isolation of Elements
-
p-Block Element (Group 15, 16, 17, 18)
-
d-Block Element (Transition Elements)
-
f-Block Element (Lanthanides & Actinides)
-
Haloalkanes and Haloarenes
-
Alcohols, Phenols, and Ethers
-
Aldehydes, Ketones, and Carboxylic Acids
-
Amines
-
Biomolecules
-
Polymers
-
Chemistry in Everyday Life
3. Biology (For PCB students)
Biology focuses on understanding life processes, genetics, biotechnology, and environmental studies.
Unit-wise Syllabus:
-
Reproduction
-
Reproduction in organisms
-
Sexual reproduction in flowering plants
-
Human reproduction
-
Reproductive health
-
-
Genetics and Evolution
-
Principles of inheritance and variation
-
Molecular basis of inheritance
-
Evolution
-
-
Biology and Human Welfare
-
Human health and disease
-
Strategies for enhancement in food production
-
Microbes in human welfare
-
-
Biotechnology and Its Applications
-
Ecology and Environment
4. Mathematics (For PCM students)
Mathematics covers algebra, calculus, probability, and more.
Unit-wise Syllabus:
-
Relations and Functions
-
Inverse Trigonometric Functions
-
Matrices
-
Determinants
-
Continuity and Differentiability
-
Applications of Derivatives
-
Integrals
-
Applications of Integrals
-
Differential Equations
-
Vector Algebra
-
Three-Dimensional Geometry
-
Linear Programming
-
Probability
5. English (Core)
Prose & Poetry:
-
Selected short stories and poems from the prescribed Bihar Board English book
-
Grammar: Tenses, clauses, voice, reported speech
-
Writing: Letter writing, report writing, essay writing, comprehension
6. Hindi / Elective Language
-
Prescribed prose and poetry from Bihar Board books
-
Grammar
-
Creative writing section
Preparation Tips for Bihar Board Class 12 Science 2025-26
-
Start with NCERT and Bihar Board prescribed books.
-
Make a timetable to cover every subject evenly.
-
Practice previous year question papers.
-
Focus on high-weightage chapters first.
-
Revise regularly and take mock tests.
FAQs
Bihar Board Class 12 Science Syllabus 2025-26
Q1. Where can I download the official Bihar Board Class 12 Science syllabus 2025-26?
Ans: You can download the syllabus from the official BSEB website (biharboardonline.bihar.gov.in) in PDF format.
Q2. Is there any change in the Class 12 Science syllabus for 2025-26?
Ans: Yes, some chapters have been slightly updated to align with CBSE guidelines, but the overall structure remains the same.
Q3. How many subjects are compulsory for Bihar Board Class 12 Science?
Ans: Physics, Chemistry, English, and one optional subject (Mathematics or Biology) are compulsory, along with one language subject.
Q4. Which chapters in Physics have the highest marks weightage?
Ans: Optics, Current Electricity, and Electronic Devices usually carry higher marks.
Q5. Can I choose both Mathematics and Biology in Bihar Board Class 12 Science?
Ans: Yes, students can choose both as additional subjects if they wish to pursue diverse career options.
Bihar Board Class 12 Science Syllabus 2025-26
https://www.instagram.com/reel/DNJG-Wrs-Rs/?igsh=d2VveWhnMmtkeTFr