The Central Board of Secondary Education (CBSE) has released important details for the Class 10 Science Board Exam 2026. Students preparing for the exam, which will take place from February 17 to March 10, 2026 , should note the marks distribution. The Science theory paper will be for 70 marks , and the practical exam will be for 30 marks . This makes a total of 100 marks for the Science subject.
Understanding the marks given to different parts of the syllabus is very helpful. This guide explains how marks are divided between Physics, Chemistry, and Biology. It also shows the expected marks for each chapter. This information helps students plan their studies well.
CBSE Class 10 Science 2026: Theory Paper Structure
The 70-mark theory paper will have questions of different types. These include Multiple Choice Questions (MCQs), short-answer type questions, and long-answer type questions. Students should refer to the official syllabus and the NCERT book for their preparation. All questions in the CBSE Class 10 Science Exam 2026 will come from the NCERT syllabus.
Chemistry Chapter-wise Marks Distribution
Here is the expected marks distribution for Chemistry chapters. This table shows how many questions of 1, 2, 3, 4, and 5 marks are expected from each chapter and the total marks for that chapter.
| Chapter No. | 1 Mark Qs | 2 Marks Qs | 3 Marks Qs | 4 Marks Qs | 5 Marks Qs | Total Marks |
| 1 | 3 | — | 1 | — | — | 6 |
| 2 | 3 | — | — | — | — | 3 |
| 3 | 1 | 1 | 1 | — | — | 5 |
| 4 | 1 | — | — | 1 | — | 5 |
Biology Chapter-wise Marks Distribution
The table below shows the expected marks distribution for Biology chapters. This includes the number of questions of different marks and the total marks for each chapter.
| Chapter No. | 1 Mark Qs | 2 Marks Qs | 3 Marks Qs | 4 Marks Qs | 5 Marks Qs | Total Marks |
| 5 | 2 | 2 | 1 | — | — | 7 |
| 6 | 1 | 1 | — | — | — | 3 |
| 7 | 1 | — | — | — | 1 | 6 |
| 8 | 3 | — | — | 1 | — | 7 |
Physics Chapter-wise Marks Distribution
Here is the expected marks distribution for Physics chapters. Use this table to understand which chapters are important based on the marks they carry.
| Chapter No. | 1 Mark Qs | 2 Marks Qs | 3 Marks Qs | 4 Marks Qs | 5 Marks Qs | Total Marks |
| 9 | — | — | 2 | 1 | — | 10 |
| 10 | — | 1 | — | — | — | 2 |
| 11 | 2 | — | — | — | 1 | 7 |
| 12 | 3 | — | 1 | — | — | 6 |
| 14 | — | 1 | 1 | — | — | 5 |
Tips for Exam Preparation
Students should create their study timetable based on these chapter marks. Give more time to chapters that carry more marks. Practicing questions from previous year papers is also helpful. It can improve how fast and accurately students solve the paper during the actual exam.
