NSO Answer Key 2025: Download OMR Sheet Here

Updated on Nov 29, 2025 09:58 IST

By Salviya Antony, Senior Executive - Content

SOF NSO Answer Key 2025: The Science Olympiad Foundation (SOF) release SOF NSO Answer Key 2025 for all the sets on the official NSO website for Stage 1 in December 2025. Students must check the answer keys and calculate their expected scores. Students who get the minimum qualifying marks will be eligible to appear for NSO 2025-26 exam level 2. NSO 2025-26 answer key for level 2 will be released within 2 weeks after the exam. Once releases, we will provide direct link for the NSO SOF Answer Key 2025 here.

NSO is an annual scholarship exam that aims at cultivating scientific reasoning and logical ability among school students. Every year, around 10 lakh students register for NSO. It is conducted at two levels. NSO level 1 result 2025 will be released in January 2026. The NSO level 2 exam will be held in February 2026. NSO level 2 result 2026 will be released in March 2026.

Table of contents

NSO Answer Key 2025: Related Dates
NSO 2025 Exam Dates & Schedule
NSO Answer Key 2025: Steps to Download
How to Calculate Scores with NSO Answer Key 2025?
NSO 2025 Marking Scheme

NSO Answer Key 2025: Related Dates

Event	Dates
NSO exam dates 2025	November 13, November 27, and December 11, 2025
Release of NSO Result Level 1	January 2026*
NSO 2025-26 Exam Date for Level 2	February 2026*
NSO Answer Key 2025-26 for Level 2	February/March 2026*
NSO Result Date for Level 2	March 2026*

NSO 2025 Exam Dates & Schedule

Take a look at the table below for the complete schedule of NSO 2025 exam

Dates	Upcoming Exam Dates
Jan ' 26	Release of NSO Result 2025-26 Level 1 TENTATIVE

NSO Answer Key 2025: Steps to Download

Open official website - sofworld.org/nso
Click on 'View all updates'
Click on the SOF NSO ANSWER KEYS class-wise links
The NSO answer key will appear on your screen
Check the answers with those marked by the candidate
Calculate score

View answer key

How to Calculate Scores with NSO Answer Key 2025?

Students have to follow the given marking scheme to calculate scores with the NSO 2025 answer key.

Add marks for every correct answer.
There will be no negative deduction.

NSO 2025 Marking Scheme

Class	Topic/Section	Number of sections	Marks per question	Total Marks
1 to 4	Logical Reasoning	5	1	5
	Science	25	1	25
	Achievers Section	5	2	10
	GRAND TOTAL	35		40
5 to 10	Logical Reasoning	10	1	10
	Science	35	1	35
	Achievers Section	5	3	15
	GRAND TOTAL	50		60
11 and 12	Physics & Chemistry	25	1	25
	Achievers Section	5	3	15
	Mathematics/Biology	20	1	20
	GRAND TOTAL	50		60

SOF NSO Result 2025

The SOF NSO 2025 result for level 1 will be declared in January 2026. Science Olympiad Foundation (SOF) will also send the National Science Olympiad result 2026 to the students' respective schools. The NSO Result 2026 will comprise a participation certificate along with the Student Performance Report (SPR) for each participating student. SPR contains a detailed analysis of the performance in different sections of the exam. Class Toppers are awarded Gold, Silver and Bronze medals. The results will also be made available online. NSO result 2025-26 for level 2 is expected to be released in March 2026.