NSO Answer Key 2025-26: Download OMR Sheet Here

NSO Answer Key 2025-26: The Science Olympiad Foundation (SOF) will soon release the NSO Answer Key 2025-26 for students of Classes 1 to 12 who appear in the National Science Olympiad (NSO). This answer key will help students evaluate their performance and estimate their probable scores even before the official result declaration.

In this article, we’ll cover every detail related to the NSO 2025-26 Answer Key, OMR sheet download, important dates, marking scheme, steps to calculate scores, and much more.

NSO 2025-26 Overview

What Is the NSO Answer Key 2025-26?

The NSO Answer Key 2025-26 will be a set of officially released answers to all the questions asked in the exam. It allows candidates to verify their answers and calculate tentative scores based on the official marking scheme. The answer key will be released after all the exam dates are completed.

When Will the NSO Answer Key 2025 Be Released?

The SOF generally releases the answer key for NSO within 2 to 3 weeks after the final exam date. Since the last NSO exam for the 2025-26 session is scheduled for 11th December 2025, students can expect the answer key to be available by late December 2025.

Tip: Keep visiting the official SOF website or stay in touch with your school coordinator to get real-time updates.

Don’t Miss: NSO Result, Cut-Off & Awards 2026

Click Here To check NSO Cut-Off Click For NSO Result

How to Download NSO Answer Key 2025-26?

Here are the simple steps you’ll need to follow:

1. Visit the official SOF website: www.sofworld.org
2. Click on "Answer Keys" under the NSO section.
3. Select your class (1 to 12).
4. Click on the download link to get the PDF of the answer key.
5. You can also download the OMR sheet (if released) to compare your responses.

What Is a NSO OMR Sheet?

An OMR (Optical Mark Recognition) Sheet is used by students to mark answers in the NSO exam. The SOF may release scanned copies of the OMR sheet filled by the student so they can verify their marked responses against the official answer key. This transparency helps students understand where they went wrong.

NSO 2025-26 Marking Scheme (Expected)

The NSO question paper consists of three main sections: Logical Reasoning, Science, and Achievers Section. Here is the tentative marking scheme:

For Classes 1 to 4:

For Classes 5 to 12:

Also Read: NSO Level 2 Exam Pattern & Marking Scheme 2026

How to Calculate Marks Using NSO Answer Key?

Once the answer key is out, you can follow the steps below:

1. Compare each of your answers with the official answer key.
2. Mark +1, +2, or +3 for each correct response (depending on your class and section).
3. No negative marking for wrong answers.
4. Total your scores as per the marking scheme above.

Example: If you're a Class 6 student and answered 30 out of 50 questions correctly including 3 from the Achievers Section, your score would be:

27×127 × 127×1 + 3×3=27+9=363 × 3 = 27 + 9 = 363×3=27+9=36 marks

Will SOF Release the Student’s OMR Sheet?

Yes, the SOF is expected to release the scanned copy of each student's OMR sheet along with the answer key. Students will be able to log in using their roll number and registration details to access this. This will allow you to check exactly how your responses were recorded during the exam.

Important Dates to Remember

How Useful Is the NSO 205-26 Answer Key?

The answer key is a powerful tool because:

• It helps students analyze their strengths and weaknesses.
• Allows estimation of tentative scores.
• Helps in preparing for the second level (if qualified).
• Offers transparency in the evaluation process.

Where to Get NSO Sample Papers?

While preparing and verifying answers, students can also practice with official and previous year NSO Sample Papers available on the SOF website. Practicing these will improve speed and accuracy for future olympiads or second-level exams.

What to Do After Checking the SOF NSO Answer Key 2025-26?

After checking your answers, it is advisable to:

• Note down topics or questions you got wrong.
• Work on similar problems from previous papers or guides.
• If eligible for Level 2 (for Classes 3–12), begin preparation accordingly.
• Reach out to your school teacher or mentor for detailed analysis.

Resources to Use After SOF NSO 2025-26 Answer Key

Related NSO Pages

• NSO Exam Date
• NSO Application Form
• NSO Syllabus
• SOF NSO Level 2 2026: Exam Dates, Syllabus & Pattern
• NSO Level 2 Exam Revision Tips & Common Mistakes to Avoid
• How to Qualify NSO Level 2 Exam 2026?
• SOF NSO Level 2 Awards, Medals & Scholarships

Conclusion

The NSO Answer Key 2025-26 will play a crucial role for students to self-evaluate and understand their performance. It will be released soon after the final exam date and will be available class-wise on the SOF website. With the answer key and OMR sheet in hand, students will be better informed and more confident as they await the official results.

Make sure to check the SOF portal regularly and stay updated with your school’s announcements.

NSO Answer Key 2025-26 FAQs

Q1. When will the NSO Answer Key 2025-26 be released?
Answer: The answer key is expected to be released in the last week of December 2025.

Q2. Will the OMR sheet also be released?
Answer: Yes, the SOF is likely to provide scanned OMR sheets for students to check their responses.

Q3. Where can I download the NSO Answer Key 2025-26?
Answer: You can download it from the official SOF website: www.sofworld.org

Q4. Is there negative marking in the NSO exam?
Answer: No, there is no negative marking in NSO.

Q5. How can I use the answer key effectively?
Answer: Compare your answers with the key, use the marking scheme to calculate your score, and identify areas for improvement.