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The SOF has made NSO Sample Papers 2025-26 for all classes. Those students who are eligible for this paper will be able to download the paper from our official website, careers360. This sample paper is based on the latest syllabus 2025-26. It will be used in both level exams, level 1 and level 2. If you want to download the sample paper, please read the article NSO Sample Paper 2025-26 .

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The SOF NSO (National Science Olympiad) Class 7 Answer Key for the 2025-2026 Level 1 exam is expected to be released by the Science Olympiad Foundation (SOF) in December 2025. The NSO exam is conducted in three sets (Set A, B, and C) on different dates. Since the NSO Set C exam was held just today (December 11, 2025), the answer keys for all sets (Set A, B, and C) will be made available shortly this month on the official website, sofworld.org, and will also be updated on the provided page. Once released, you can use the respective answer key (based on your exam set) to calculate your estimated score for the 60-mark paper and check your performance against the NSO cutoff for Level 2 qualification, which will be held in February 2026. You can monitor and download the relevant NSO Answer Key for Class 7 directly here: https://school.careers360.com/articles/nso-answer-key

The CBSE Class 10 Pre-Board 2 Science Question Paper is not officially released by the CBSE, as Pre-Board exams are set by individual schools and local Sahodaya clusters. However, the best way to simulate the "Pre-Board 2" experience (which typically represents the final difficulty level just before the boards) is by practicing the numerous Solved Sample Question Papers (SQPs) for the 2025-2026 session available on the linked page.

You should use these papers because:

1. They Match the Final Pattern: The papers strictly adhere to the 2025-26 blueprint: 80 Marks total, requiring answers in separate, designated sections for Biology, Chemistry, and Physics, and a significant portion (32%) dedicated to Case-Based Questions.

2. Multiple Sets are Available: The page offers several different sets (Set 1, Set 2, Set 3, etc.) of the Science Sample Paper, complete with solutions, which allows you to practice multiple full-syllabus tests under timed conditions just as you would for Pre-Board 2.