White light splits into how many colors?
💡 Explanation: Seven colors
Sound cannot travel through?
💡 Explanation: Needs medium
CNG stands for?
💡 Explanation: Compressed Natural Gas
Which is not conductor?
💡 Explanation: Silicon semiconductor
Camera uses which lens?
💡 Explanation: Convex forms image
Densest element?
💡 Explanation: Osmium densest
SI unit of pressure?
💡 Explanation: Standard unit
Vitamin D deficiency causes?
💡 Explanation: Rickets disease
Daily air intake?
💡 Explanation: Approx breathing
Most abundant in Earth crust?
💡 Explanation: Oxygen highest
Most abundant element in universe?
💡 Explanation: Hydrogen dominates
Average blood volume in adults?
💡 Explanation: Approx 5 liters
The Sun is a?
💡 Explanation: Sun is a star
Second most abundant element in Sun?
💡 Explanation: Helium ~25%
Who discovered radioactivity?
💡 Explanation: Discovered in 1896