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CBSE Class 10 2025 Science Weightage, Marks, and Exam Pattern

by PW Gulf
May 2, 2024
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CBSE Class 10 2025 Science Weightage: CBSE has released the revised syllabus for Science along with chapter-wise weightage. Candidates can download the syllabus from the official website of CBSE. Referring to the syllabus, candidates can create a strategic study plan for comprehensive coverage of all the topics. 

The CBSE class 10 2025 Science syllabus comprises a total of five units. Each chapter and unit has significant weights for the board exam. This comprehensive guide provides detailed CBSE class 10 2025 Science weightage. 

CBSE Class 10 2025 Science Highlights 

The following table includes notable highlights of CBSE class 10 2025 Science:

Particulars

Details

Subject

Science

Exam conducting body

Central Board of Secondary Education (CBSE)

Exam Duration

3 Hours

Mode of Exam

Offline

No. of chapters

Units: 5

Chapters: 13

Medium of Exam

English / Hindi

Type of Questions

MCQs

Short answer type questions

Long answer type questions

Internal Assessment marks

20

Marks allotted to theory paper

80

Total marks

100

Passing Marks

33% in aggregate

CBSE Class 10 Science Syllabus 2025

The detailed CBSE Class 10 Science Syllabus for the academic year 2024-25 is provided below, featuring unit-wise chapters. Students must cover all the topics in the latest Science syllabus to pass the board exam with excellent scores:

Unit No.

Unit Name

Chapter

1

Chemical Substances – Nature and Behaviour

Chemical Reactions 

Acids, Bases, and Salts

Metals and Non-Metals 

Carbon Compounds

2

World of Living

Life Processes 

Control and Co-ordination in Animals and Plants

Reproduction

Heredity and Evolution

3

Natural Phenomenon

Light - Reflection and Refraction 

Human Eye and the Colourful World

4

Effect of Current

Electricity 

Magnetic Effects of Current

5

Natural Resources

Our Environment

Unit-Wise CBSE Class 10 2025 Science Weightage

The table below provides the unit-wise allocation of marks for the CBSE class 10 Science syllabus 2025:

Unit No.

Unit Name

Marks

1

Chemical Substances – Nature and Behaviour

25

2

World of Living

25

3

Natural Phenomenon

12

4

Effects of Current

13

5

Natural Resources

05

Theory Marks

 

80

Chapter-Wise CBSE Class 10 2025 Science Weightage

The following table provides details of chapter-wise CBSE class 10 2025 Science weightage:

Chapter No.

Chapter Name

Marks

I

Chemical Reactions and Equations

6

2

Acid, Bases and Salts

3

3

Metals and Non-Metals

10

4

Carbon and its Compounds

6

5

Life Processes

9

6

Control and Coordination

6

7

How do Organisms Reproduce?

3

8

Heredity and Evolution

7

9

Light- Reflection and Refraction

10

10

The Human Eye and the Colourful World

2

11

Electricity

7

12 

Magnetic Effects of Electric Current

6

13

Our Environment

5

Chapters Removed from CBSE Class 10 2025 Science

CBSE has removed specific topics from the CBSE class 10 Science syllabus 2024-25. Following are the deleted sections of the class 10 Science:

Chapter

Deleted Topics

Periodic Classification of Elements

Entire Chapter 

Human Eye and the Colourful World

Use of scattering to explain changes in the colour of the Sun during sunrise and sunset

Heredity and Evolution

fundamental of evolution

Evolution and its classification

Evolution not equated with progress

Sources of Energy

Entire Chapter 

Magnetic Effects of Current

Electric motor

Electric generator

Electromagnetic induction

Induced current

Induced potential difference

Fleming’s Right Hand Rule

Management of Natural Resources

Entire chapter 

CBSE Class 10 2025 Science Exam Pattern

The theory exam of CBSE class 10 Science carries a total of 80 marks, and the exam duration spans 3 hours. After getting the question paper, students are provided with an additional 15 minutes to read the paper. 

Below is a breakdown of the detailed structure of the CBSE class 10 Science question paper with a marking scheme:

Section

Question Type

No. of Questions

Marks per Question

Weightage (in Marks)

A

MCQs

20

1

20

B

Short Answer Type - I

6

2

12

C

Short Answer Type - II

7

3

21

D

Long Answer Type

3

5

15

E

Case Study Based

3

4

12

Start a strategic and diligent preparation for the CBSE class 10 Board exam with PW Gulf Foundation Coaching. Join now for detailed syllabus coverage and conceptual clarity under the guidance of expert faculties.

CBSE Class 10 2025 Science Weightage FAQs

Q1. Which chapter has the most weightage for science class 10?

Ans. Light-refraction & reflection and Metals & Non-metals carry the highest weightage in the CBSE class 10 board exam.

Q2. Which section in class 10 Science exam has highest weightage?

Ans. Section C of the class 10 Science exam carries the highest weightage.

Q3. What is the hardest chapter in 10th Science?

Ans. Electricity, Chemical Reaction and Equation, and Human Eye are the toughest chapters in class 10 Science.

Q4. How many marks are allocated to class 10 Science internal assessment?

Ans. 20 marks are allocated to class 10 Science internal assessment.

Q5. Has CBSE reduced class 10 2025 Science syllabus?

Ans. Yes, the board has reduced the class 10 Science syllabus for the academic year 2024-25. Nearly 30% of the overall syllabus has been reduced.

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