Medium SOF National Science Olympiad (NSO/ISO) · NSO Level 1 · . Sample Which simple machine is a ramp? A Pulley B Lever C Inclined plane D Wheel and axle Submit Answer Show Explanation Mark as Completed Mark as Important Mark for Review
Mendeleev left gaps in his periodic table and predicted the properties of "eka-aluminium". Which element, discovered later, matched this prediction? SOF National Science Olympiad (NSO/ISO) . Medium · Chemistry · 2026 See Explanation
The refractive index of glass is 1.5 and the speed of light in vacuum is 3 × 10⁸ m/s. What is the speed of light in glass? SOF National Science Olympiad (NSO/ISO) . Medium · Science · 2026 See Explanation
Match the vitamin in Column I with the deficiency disease in Column II. Column I: (i) Vitamin C (ii) Vitamin D (iii) Vitamin A (iv) Vitamin B1 Column II: (p) Night blindness (q) Beri-beri (r) Scurvy (s) Rickets SOF National Science Olympiad (NSO/ISO) . Medium · Biology · 2026 See Explanation
In a lever the effort arm is 60 cm and the load arm is 20 cm. What effort is needed to lift a load of 90 N? SOF National Science Olympiad (NSO/ISO) . Medium · Physics · 2026 See Explanation
Assertion (A): Reflex actions are very quick. Reason (R): Reflex actions are controlled by the cerebrum. Choose the correct option. SOF National Science Olympiad (NSO/ISO) . Medium · Biology · 2026 See Explanation