Olympiads / NSO
National Science Olympiad Practice Tests
The NSO is a premier school science competition covering Physics, Chemistry, and Biology alongside logical reasoning and higher-order thinking questions for Classes 1–12.
Organizer
Science Olympiad Foundation (SOF)
Grades
1–12
Exam months
November – February
Duration
60 minutes
Exam structure
| Section | Gr 1–4 | Gr 5–12 |
|---|---|---|
| Logical Reasoning | 10 Qs | 15 Qs |
| Science | 25 Qs | 35 Qs |
| Achievers Section | 5 Qs | 10 Qs |
| Total | 40 Qs | 60 Qs |
How OlympiadCloud helps
Timed mock tests
Full-length NSO mock exams timed by our server — same pressure as the real exam, no workarounds.
Instant rank
After every submission you see your score and your rank against every other student who took the same test.
Full explanations
Every question in our bank comes with a written explanation — not just the answer, but the reasoning.
Full-length NSO mock exams
Complete NSO papers with real question counts and timing, instant score and all-India rank. Your first full exam is free.
- NSO Class 135 questions, 60 min
- NSO Class 235 questions, 60 min
- NSO Class 335 questions, 60 min
- NSO Class 435 questions, 60 min
- NSO Class 550 questions, 60 min
- NSO Class 650 questions, 60 min
- NSO Class 750 questions, 60 min
- NSO Class 850 questions, 60 min
- NSO Class 950 questions, 60 min
- NSO Class 1050 questions, 60 min
- NSO Class 1159 questions, 60 min
- NSO Class 1260 questions, 60 min
Key topics
Browse by grade
Start your free NSO practice today
No credit card. Your first full exam is free.