Water General Knowledge MCQs

1. : What is the chemical formula of water?
(A) H₂O₂
(B) H₂O
(C) CO₂
(D) O₂

2. : What percentage of the Earth’s surface is covered by water?
(A) 51%
(B) 61%
(C) 71%
(D) 81%

3. : What is the boiling point of water at sea level?
(A) 50°C
(B) 75°C
(C) 100°C
(D) 125°C

4. : What is the process of converting water into vapor called?
(A) Condensation
(B) Evaporation
(C) Freezing
(D) Sublimation

5. : What is the largest ocean on Earth?
(A) Atlantic Ocean
(B) Indian Ocean
(C) Arctic Ocean
(D) Pacific Ocean

6. : What is the main source of freshwater on Earth?
(A) Oceans
(B) Glaciers and Ice Caps
(C) Underground Water
(D) Lakes and Rivers

7. : What is the pH level of pure water?
(A) 5
(B) 6
(C) 7
(D) 8

8. : What percentage of the human body is made up of water?
(A) 30-40%
(B) 50-60%
(C) 70-80%
(D) 90-95%

9. : What is the name of the process by which plants release water vapor into the air?
(A) Condensation
(B) Transpiration
(C) Precipitation
(D) Filtration

10. : Which of the following is the purest form of natural water?
(A) River water
(B) Rainwater
(C) Well water
(D) Sea water