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By Swati Singh
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Updated on 25 Feb 2026, 14:11 IST
CBSE Class 10 Science Answer Key 2026 Available Now on Infinity Learn – The CBSE Class 10 Science Board Exam 2026 was conducted smoothly on 25 February 2026 for the academic year 2025–26. The examination took place in offline mode during the morning session from 10:30 AM to 1:30 PM. The theory paper was set for 80 marks, while the remaining 20 marks will be awarded through internal assessment by schools.
With the exam now completed, many students may be reviewing their answers and wondering how accurately they performed. Feeling uncertain after a board exam is completely normal. To support students during this phase, the complete answer key for the CBSE Class 10 Science 2026 exam is provided here. By comparing their responses with the correct solutions, students can estimate their expected scores more confidently.
In addition, the CBSE Class 10 Science 2026 question paper PDF has been shared for easy reference. Students can download the paper and review it alongside the detailed answer key to better understand their mistakes and calculate their likely marks.
Check below to download the CBSE Class 10 Science Question Paper 2026 PDF and access the complete answer key.
| CBSE Class 10 Science 2026 Sets | Question Paper PDF | Answer Key PDF |
| CBSE Class 10 Answer Key 2026 Science Set 1 | Download PDF | Download Answer Key |
| CBSE Class 10 Answer Key 2026 Science Set 2 | Download PDF | Download Answer Key |
| CBSE Class 10 Answer Key 2026 Science Set 3 | Download PDF | Download Answer Key |
| Particulars | Details |
| Exam Conducting Body | Central Board of Secondary Education (CBSE) |
| Academic Session | 2025–2026 |
| Exam Name | CBSE Class 10 Board Exam 2026 |
| Exam Mode | Offline (Pen and Paper Mode) |
| Subject | Science |
| Total Marks | 100 Marks (Theory + Internal Assessment) |
| Theory Exam Marks | 80 Marks |
| Internal Assessment | 20 Marks (Periodic Tests, Assignments, Practical Work, etc.) |
| Exam Duration | 3 Hours |
| Question Paper Pattern | MCQs, Very Short Answer, Short Answer, Long Answer, Case Study Based Questions |
| Passing Marks | Minimum 33% in the subject |
| CBSE Class 10 Science Exam 2026 | 25 February 2026 |
| Answer Key Availability | Available after the exam (Unofficial first, Official if released) |
| Official Website | @https://cbse.gov.in |
| Reference Books | NCERT Textbook for Class 10 Science |
| ection | Question Numbers | Type of Questions | Marks per Question | Total Marks | Internal Choice |
| A | 1–20 | Multiple Choice Questions (MCQs) | 1 mark each | 20 | No |
| B | 21–26 | Very Short Answer (VSA) | 2 marks each | 12 | Internal choice in some questions |
| C | 27–33 | Short Answer (SA) | 3 marks each | 21 | Internal choice provided |
| D | 34–36 | Long Answer (LA) | 5 marks each | 15 | Internal choice provided |
| E | 37–39 | Case Study-Based Questions | 4 marks each | 12 | Internal choice provided |
| Total | 39 Questions | All Questions Compulsory | Maximum Marks: 80 | – | – |
Follow these simple steps to download the CBSE Class 10 Science Answer Key 2026:
Visit the Official Website Go to the official CBSE website (cbse.gov.in).
Go to the Latest Announcements Section: On the homepage, look for the “Latest Updates” or “Public Notices” section.
Find the Science Answer Key Link: Search for the link that says “CBSE Class 10 Science Answer Key 2026.”
Click on the Link: Click the link to open the answer key PDF.
Download the PDF: Once the PDF opens, click the download button to save it on your device.
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Check Your Set Code: Make sure you download the correct answer key based on your question paper set (Set 1, Set 2, Set 3, etc.).
The CBSE Class 10 Science Exam 2026 was conducted smoothly across exam centres. The paper followed the latest CBSE pattern and covered questions from Physics, Chemistry, and Biology. Here is a detailed analysis based on student reactions and expert review.
| Exam Details | Analysis |
| Overall Difficulty Level | Easy to Moderate |
| Section A (MCQs) | Mostly direct and concept-based questions |
| Section B (2 Marks) | Short and straightforward; based on basic concepts |
| Section C (3 Marks) | Moderate level; required clear explanation |
| Section D (5 Marks) | A few lengthy questions; required detailed answers |
| Section E (Case Study) | Application-based and slightly time-consuming |
| Most Time-Consuming Section | Long Answer and Case Study questions |
| Longest Question | 5-mark descriptive question from Physics/Chemistry section |
| Expected Good Score | 65+ marks considered a good score |
| Student Reaction | Paper was balanced with a mix of theory and application-based questions |
| Expert Opinion | Well-structured paper following the latest CBSE pattern |
| Unit No. | Unit Name | Chapters Included | Marks |
| I | Chemical Substances – Nature & Behaviour | 1. Chemical Reactions and Equations 2. Acids, Bases and Salts 3. Metals and Non-Metals 4. Carbon and Its Compounds | 25 |
| II | World of Living | 5. Life Processes 6. Control and Coordination 7. How do Organisms Reproduce 8. Heredity and Evolution | 25 |
| III | Natural Phenomena | 9. Light – Reflection and Refraction 10. The Human Eye and the Colourful World | 12 |
| IV | Effects of Current | 11. Electricity 12. Magnetic Effects of Electric Current | 13 |
| V | Natural Resources | 13. Our Environment 14. Management of Natural Resources | 5 |
| Total (Theory Paper) | 80 | 80 |
| Parameter | Student Feedback | Teacher Feedback |
| Overall Difficulty Level | Students described the paper as moderate and manageable. | Teachers viewed the paper as well-balanced, maintaining a fair difficulty level. |
| NCERT Alignment | Most questions were directly based on NCERT textbooks. | The paper strictly followed the prescribed syllabus with no out-of-scope questions. |
| Physics Section | Numericals were slightly lengthy and required careful time management. | Physics questions focused on concept clarity and practical application. |
| Chemistry Section | Chemical equations and theory-based questions were simple and straightforward. | Chemistry portion tested fundamentals, especially reactions and key concepts. |
| Biology Section | Case study-based questions were understandable and not overly complex. | Biology questions were largely direct and scoring for well-prepared students. |
| Concept & Application-Based Questions | Some analytical questions required deeper understanding. | A good mix of conceptual and application-oriented questions was included. |
| Assertion-Reason & MCQs | Options were close in a few questions, requiring attention to detail. | Competency-based questions aligned with the latest CBSE examination pattern. |
| Internal Choices | Helped students attempt their strongest questions confidently. | Internal options were distributed properly across all sections. |
| Sample Paper Relevance | Students who practiced sample papers felt more confident during the exam. | Regular practice of sample papers and previous years’ questions would help students score higher marks. |
| Expected Performance | Many students expect scores in the 65–75+ range. | Teachers anticipate good overall results, especially for thoroughly prepared students. |
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It is a document that contains the correct answers to the questions asked in the Science board exam. Students can use it to compare their answers and estimate their marks.
The unofficial answer key is usually released on the same day or a day after the exam. The official answer key may be released later by CBSE after the exams are completed.
The official answer key will be available on the CBSE official website. Unofficial answer keys can be found on educational websites and coaching institute platforms.
Unofficial answer keys are prepared by subject experts, but they may have small errors. For complete accuracy, students should refer to the official answer key released by CBSE.
Compare your answers with the answer key, count the correct answers, and add the marks according to the marking scheme. CBSE Class 10 exams usually do not have negative marking.
Yes, answer keys are usually released for all sets (Set 1, Set 2, Set 3, etc.). Students should download the answer key that matches their question paper set.
If CBSE allows objections, students can submit their concerns within the given time through the official process mentioned on the CBSE website.
CBSE may release answer keys depending on the exam and policy decisions. Students should check the official website for updates.
No, the marks calculated using the answer key are only an estimate. The final marks will be announced in the official result.
The results are expected to be announced around May 2026, but students should wait for the official confirmation from CBSE.
The CBSE Class 10 Science Board Exam 2026 was conducted on 25 February 2026 from 10:30 AM to 1:30 PM.
Students can download the answer key from educational websites after the exam. It will be available for all question paper sets