NSO Answer Key 2026: Download OMR Sheet Here

By Salviya Antony, Senior Executive - Content

SOF NSO Answer Key 2025: The Science Olympiad Foundation (SOF) released 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 was released within 2 weeks after the exam. We have provided 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 exam. It is conducted at two levels. NSO level 1 result 2025 was released in January 2026. NSO released level 2 result 2026 in March 2026.

Direct Link to download NSO SOF answer key 2025-26

Table of contents

NSO Answer Key 2025: Related Dates
NSO 2025 Exam Dates & Schedule
How to Calculate Scores with NSO Answer Key 2025?
NSO Answer Key 2025: Steps to Download
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 2, 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 18, 2026

NSO 2025 Exam Dates & Schedule

Take a look at the table below for the complete schedule of NSO 2026 exam

Dates	Past Exam Dates
11 Dec ' 25	NSO Level 1 Exam 2025 - Date 3
27 Nov ' 25	NSO Level 1 Exam 2025 - Date 2
13 Nov ' 25	NSO Level 1 Exam 2025 - Date 1

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.

Following are the uses of NOS answer key.

Helps students to calculate the expected score
They can compare their answers with the official key.
Helps students to prepare themselves for their results.
Find out errors in the official answer key given by board.

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

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 was 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.