The CBSE Class 10th Science Board Exam 2026 was successfully conducted today, 25 February 2026, in offline mode across various exam centres affiliated with the Central Board of Secondary Education (CBSE). Students can now check the CBSE Class 10 Science unofficial answer key 2026 here, along with a detailed paper analysis, difficulty level, and section-wise review. The unofficial answer key will be released today around 2:00 PM after the exam
CBSE Class 10 Science Exam 2026 - Key Highlights
- Board: Central Board of Secondary Education (CBSE)
- Class: 10th
- Subject: Science
- Exam Date: 25 February 2026
- Exam Timing: 10:30 AM to 1:30 PM (3 hours)
- Reporting Time: 10:00 AM
- Question Paper Type: Theory (80 marks)
- Internal Assessment: 20 marks
- Mode of Exam: Offline (Pen and Paper)
- Unofficial Answer Key: Expected at 2:00 PM (today)
CBSE Class 10 Science Answer Key 2026 (Unofficial) – Release Time
The CBSE Class 10 Science paper ended at 1:30 PM and students will be able to access the unofficial answer key for all sets around 2:00 PM. Coaching institutes and subject experts will solve the question paper and provide a set-wise solution PDF and video explanation for students
Students can use this unofficial answer key to:
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Estimate their probable marks before the official CBSE answer key and result.
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Cross-check objective and short-answer questions.
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Analyse their performance and plan upcoming board exams accordingly.
CBSE Class 10 Science 2026 Answer Key (All Sets)
CBSE Class 10 Answer Key 2026 Science Set 1 (Available at 2:00 PM (Apprx))
CBSE Class 10 Answer Key 2026 Science Set 2 (Available at 2:00 PM (Apprx))
CBSE Class 10 Answer Key 2026 Science Set 3 (Available at 2:00 PM (Apprx))
CBSE Class 10 Science Exam Pattern 2026
The CBSE Class 10 Science paper 2026 carried a total of 80 marks for theory and 20 marks for internal assessment, as per the latest CBSE exam pattern 2025–26. The Science paper is designed to test conceptual understanding, application-based learning, and competency-based skills in Physics, Chemistry, and Biology.
Marking Scheme and Weightage
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Theory Exam: 80 marks
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Internal Assessment: 20 marks (periodic tests, practical work, projects, portfolio)
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Duration: 3 hours (10:30 AM – 1:30 PM)
According to the latest CBSE guidelines, the Science theory syllabus is divided into the following major units:
| Unit Name | Marks |
|---|---|
| Chemical Substances – Nature & Behaviour | 25 |
| World of Living | 25 |
| Natural Phenomena | 12 |
| Effects of Current | 13 |
| Natural Resources | 5 |
| Total (Theory) | 80 |
How to Use the CBSE Class 10 Science Unofficial Answer Key 2026
Once the unofficial answer key for CBSE Class 10 Science 2026 is published around 2:00 PM, students can follow these steps to calculate their expected marks:
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Keep your Science question paper and OMR/answer sheet with you.
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Match your responses with the set-wise unofficial answer key provided by experts.
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For MCQs and assertion–reason questions, award 1 mark for each correct answer, without negative marking.
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For short and long answers, compare with detailed solutions to estimate partial marks based on CBSE marking scheme.
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Add the scores section-wise (Physics, Chemistry, Biology) to get your total out of 80.
This will help you predict your performance before the official result declaration and identify areas of improvement for upcoming subjects.
CBSE Class 10 Science 2026 – Official Answer Key and Result
The answer key released at 2:00 PM will be unofficial and meant only for immediate reference. The official CBSE Class 10 Science answer key 2026 (if released publicly) will be provided later on the CBSE academic/board portal along with instructions for evaluation.
Final marks will be based on:
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Board evaluation as per the official marking scheme.
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Theory (80 marks) + Internal assessment (20 marks).
Students are advised not to panic if there is a slight mismatch between unofficial and official solutions, as examiners may follow step-wise marking and allow equivalent answers.
