CBSE Class 10th Science Syllabus 2025–26, Check Chapter-Wise Topics
Check the latest CBSE Class 10 Science syllabus 2025–26 for the Science board exam. Get subject-wise syllabus for Physics, Chemistry & Biology, deleted topics, and official CBSE updates for the CBSE Phase 1 board exams scheduled to begin on February 17, 2026.
The CBSE Class 10th Science syllabus 2025–26 has been officially released by the Central Board of Secondary Education. With board exams beginning from February 17, 2026, it is important for students to strictly follow the latest prescribed syllabus for Class 10 and avoid wasting time on deleted or reduced topics.
As the 10th Science board exam is scheduled on February 25, 2026, students must align their preparation with the exact CBSE syllabus to ensure accuracy in revision and answer writing.
CBSE Class 10 Science Syllabus Overview 2025–26
The CBSE Class 10th Science Syllabus 2025–26 focuses on strengthening a student’s conceptual understanding in Physics, Chemistry and Biology. The subject encourages students to apply scientific principles in real-life situations and develop logical reasoning, problem-solving skills, and practical knowledge.
Scope of Learning:
Chemistry: Properties and reactions of substances that build the material world
Biology: Functions and interdependence of living organisms
Physics: Understanding natural phenomena involving light, electricity and magnetism
Environmental Science Elements: Sustainable practices and conservation
CBSE Class 10 Science Syllabus Chapter-Wise (2025–26)
The Class 10 Science syllabus for 2025–26 includes 12 chapters covering key concepts from Physics, Chemistry, and Biology. Each chapter plays an important role in building strong fundamentals and contributes directly to the board exam question paper.
CBSE Class 10 Science Syllabus Chapter-Wise (2025–26)
Chapter No.
Chapter Name
1
Chemical Reactions and Equations
2
Acids, Bases and Salts
3
Metals and Non-Metals
4
Carbon and Its Compounds
5
Life Processes
6
Control and Coordination
7
How Do Organisms Reproduce?
8
Heredity and Evolution
9
Light – Reflection and Refraction
10
The Human Eye and the Colourful World
11
Electricity
12
Magnetic Effects of Electric Current
CBSE Class 10th Science 2025-26 Marks Distribution
The CBSE Class 10 Science syllabus is divided into units based on Chemistry, Biology and Physics, with specific marks assigned to each area for the board exam.
For the board exams, understanding this distribution helps students focus more on high-scoring units and avoid under-preparing important sections. Check below the CBSE Class 10th Science 2025-26 Marks Distribution:
CBSE Class 10th Science 2025-26 Marks Distribution
Unit
Unit Title
Chapters Included
Marks
I
Chemical Substances – Nature and Behaviour
Ch 1, 2, 3, 4
25
II
World of Living
Ch 5, 6, 7
25
III
Natural Phenomena
Ch 9, 10
10
IV
Effects of Current
Ch 11, 12
15
V
Natural Resources & Sustainable Practices
Integrated topics
5
Total Theory Marks
80
Practical and Internal Assessment
20
CBSE Class 10 Science Syllabus 2025–26 Unit-Wise
The CBSE Class 10 Science Syllabus 2025–26 is divided into five units with clear weightage. It covers key concepts from Chemistry, Biology, Physics, and Environmental Science to build strong fundamentals for the board exams.
Unit I: Chemical Substances – Nature and Behaviour (25 Marks)
Chemical reactions and equations
Acids, bases and salts
Metals and non-metals
Carbon and its compounds
Soaps and detergents
Unit II: World of Living (25 Marks)
Life processes
Control and coordination
Reproduction in plants and animals
Reproductive health
Heredity and evolution
Unit III: Natural Phenomena (12 Marks)
Reflection of light
Refraction of light
Human eye and its defects
Dispersion of light through prism
Unit IV: Effects of Current (13 Marks)
Electric current and Ohm’s law
Heating effect of electric current
Electric power
Magnetic effects of electric current
AC and DC, domestic electric circuits
Unit V: Natural Resources (5 Marks)
Ecosystem and environment
Environmental problems
Waste management
Biodegradable and non-biodegradable substances
CBSE Class 10 Science Practical and Internal Assessment (20 Marks)
The CBSE Class 10 Science practical and internal assessment carries 20 marks. Along with theory revision, students should ensure their lab records, experiments, and viva preparation are complete before the board exams.
Below is the structure of the internal assessment system, along with the list of important practical activities prescribed for 2025–26:
CBSE Class 10 Science Practical and Internal Assessment (20 Marks)
CBSE science class 10 syllabus practical
Marks
Practical Experiments
5
Lab Record
5
Portfolio & Assignments
5
Viva/Subject Enrichment
5
CBSE Class 10 Science Syllabus PDF Download 2025–26
The CBSE Class 10 Science syllabus 2025–26 PDF has been officially released by the Central Board of Secondary Education. Referring to the latest syllabus is essential for focused board exam preparation, as it helps students concentrate only on the prescribed chapters, unit-wise weightage, and important topics expected in the final exam.
For students preparing close to the board exams, we have provided the direct download link of the official Class 10 Science syllabus PDF 2025–26 below.
Common Mistakes to Avoid Before the CBSE Class 10 Science Board Exam
Here are the common mistakes you should avoid while preparing for 10th Science board exam:
Don't study deleted or out-of-syllabus topics. Always stick to the official CBSE Class 10 Science syllabus 2025–26 only.
Skipping diagrams in Biology and Physics can make you lose easy marks. Practice neat, well-labelled diagrams exactly as given in NCERT.
Writing unbalanced equations or missing states of matter is a common mistake in Chemistry. Always revise balanced equations with correct symbols.
Read the question paper carefully and choose the easier internal options, you are most confident about.
Learning new topics close to the exam increases confusion and stress. Focus on revising high-weightage chapters and frequently asked questions instead.
What is the latest CBSE Class 10 Science syllabus for 2025 26?
The CBSE Class 10 Science syllabus 2025–26 includes Physics, Chemistry, and Biology chapters as prescribed by CBSE, with some topics reduced or deleted for board exams.
Is the Class 10 Science syllabus reduced for 2025 26?
CBSE has rationalized certain topics for the 2025–26 session. Students should follow the officially released syllabus for accurate exam preparation.
Where can I download the CBSE Class 10 Science Syllabus PDF?
You can download it from the official CBSE website – www.cbse.gov.in or from the direct link that has been provided here.
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