Previous Year Questions

Practice Questions

Browse and practice real questions from previous scholarship exams. Use filters to narrow down by year, subject, or exam.

Displaying 536 - 540 of 1956
Medium
. SOF National Science Olympiad (NSO/ISO) · Set A · 2026 . Sample
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Q. 380
Calcium carbonate on heating decomposes into calcium oxide and carbon dioxide. What type of reaction is this?
Medium
. SOF National Science Olympiad (NSO/ISO) · Set B · 2026 . Sample
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Q. 381
Balance the equation: __N2 + __H2 → __NH3
Hard
. SOF National Science Olympiad (NSO/ISO) · Set A · 2025 . Sample
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Q. 382
When copper is heated in air, it reacts with oxygen to form a black coating of copper oxide. What type of reaction is this?
Easy
. SOF National Science Olympiad (NSO/ISO) · Set A · 2024 . Sample
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Q. 383
Balance the equation: __Na + __H2O → __NaOH + __H2
Medium
. SOF National Science Olympiad (NSO/ISO) · Set C · 2025 . Sample
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Q. 384
A reaction in which energy is absorbed from the surroundings is called what?