Medium SOF National Science Olympiad (NSO/ISO) · NSO Level 1 · 2013 . Sample Practice variant 2: Which of the following is a physical change? A Melting of ice B Curd formation C Burning paper D Rusting of iron Submit Answer Show Explanation Mark as Completed Mark as Important Mark for Review
Which cells help fight infections? SOF National Science Olympiad (NSO/ISO) . Easy · Biology · 2025 See Explanation
Which soil is widely associated with cotton cultivation in India? SOF National Science Olympiad (NSO/ISO) . Easy · Science · 2018 See Explanation
Practice variant 4: Which tissue carries water upward in plants? SOF National Science Olympiad (NSO/ISO) . Hard · Biology · 2013 See Explanation
Practice variant 3: Which river is a major river of western Rajasthan? SOF National Science Olympiad (NSO/ISO) . Hard · Science · 2019 See Explanation
Practice variant 3: Which force opposes relative motion between surfaces in contact? SOF National Science Olympiad (NSO/ISO) . Medium · Physics · 2015 See Explanation