1. What is the percentage of water in the human body? 💧
👉 65% to 80% (Water is essential for the body’s functions!)
2. What is the pH value of human blood? 🩸
👉 7.4 (Maintaining pH balance is vital for good health)
3. Which blood group is a universal recipient? 🩺
👉 AB (People with AB blood group can receive blood from any group)
4. The Richter Scale is used to measure what? 🌎
👉 Earthquake intensity (It measures the magnitude of earthquakes)
5. Who invented dynamite? 💣
👉 Alfred Nobel (Founder of the Nobel Prize)
6. Plaster of Paris is obtained from what? 🏗️
👉 Gypsum (Used in construction work)
7. Which substance is present in tears? 😢
👉 Lysozyme (It has antibacterial properties)
8. What is the main cause of rusting of iron? ⚙️
👉 Oxygen (Rusting is a chemical process)
9. How much blood is present in the human body? 🩸
👉 5 to 6 liters (Essential for blood circulation)
10. How long does it take for blood to circulate throughout the body? ⏱️
👉 10 seconds (Blood circulates very quickly)
11. What is the main component of biogas? 🌿
👉 Methane (A renewable energy source)
12. Which part of the eye controls the focal length of the lens? 👁️
👉 Ciliary muscles (Help in focusing vision)
13. What is dry ice? ❄️
👉 Solid carbon dioxide (Used for special effects and cooling)
14. What is the scientific name of common salt? 🧂
👉 Sodium Chloride (NaCl) (Used in cooking)
15. Why does a rolling ball stop after some time? 🏈
👉 Because of friction (An important concept in physics)
16. Marble is a form of what? 🌟
👉 Limestone (Used in construction and sculpture)
17. How many times does the human heart beat per minute? ❤️
👉 72 times (Indicates normal heart health)
18. Which is the largest gland in the human body? 🧬
👉 Liver (Performs several vital body functions)
19. What is the normal temperature of the human body? 🌡️
👉 98.4°F or 37°C (Normal body temperature)
20. Which protein is most abundant in milk? 🥛
👉 Casein (A major component of milk)
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