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 541 - 545 of 1956
Medium
. SOF National Science Olympiad (NSO/ISO) · Set D · 2026 . Sample
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Q. 385
In the reaction Fe2O3 + 2Al → Al2O3 + 2Fe, which substance is oxidised?
Hard
. SOF National Science Olympiad (NSO/ISO) · Set A · 2026 . Sample
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Q. 386
When magnesium ribbon is burnt in air, it forms magnesium oxide. What type of reaction is this?
Easy
. SOF National Science Olympiad (NSO/ISO) · Set D · 2026 . Sample
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Q. 387
Which of the following best explains why a freshly cut apple turns brown after being left in air for some time?
Medium
. SOF National Science Olympiad (NSO/ISO) · Set C · 2025 . Sample
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Q. 388
In the reaction between dilute hydrochloric acid and sodium hydroxide, HCl + NaOH → NaCl + H2O, what type of reaction is this?
Medium
. SOF National Science Olympiad (NSO/ISO) · Set D · 2025 . Sample
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Q. 389
Silver chloride turns grey/black on exposure to sunlight, decomposing into silver and chlorine. What type of reaction is this?