General Knowledge Questions and Answers | Science GK
General Knowledge (Science)
1. Which gas is present in the highest quantity in the air?
Answer: Nitrogen
2. What is the hardest natural substance?
Answer: Diamond
3. What is the chemical formula of ozone?
Answer: O₃
4. Which vitamin is known as the "Sunshine Vitamin"?
Answer: Vitamin D
5. Who discovered blood groups?
Answer: Karl Landsteiner
6. Which is the heaviest natural element?
Answer: Uranium
7. Which tissue transports water upward in plants?
Answer: Xylem
8. What is the approximate speed of sound in air?
Answer: 330 m/s
9. One horsepower is equal to how many watts?
Answer: 746 Watts
10. What is the main function of white blood cells?
Answer: Protection against diseases
11. What is the full form of DNA?
Answer: Deoxyribonucleic Acid
12. Which organ secretes insulin in the human body?
Answer: Pancreas
13. What is the approximate value of acceleration due to gravity (g) on Earth?
Answer: 9.8 m/s²