Question

Which of the statement is FALSE in relation to "Ground Water"?

• A. It is likely to be free from pathogenic agents.
• B. It is more subjected to contamination than surface water.
• C. It is superior to surface water, because the ground itself provides an effective filtering medium.
• D. The supply of Ground Water is likely to be certain even during dry season.

Hint:

Groundwater's key advantages are its natural filtration (making it purer) and large volume (making it a more reliable source). Its main disadvantage is that if it does get contaminated, it is very difficult to clean up.

Answer 1

The Correct Option is B

Step 1: Understand the properties of groundwater. Step 1: Groundwater is water found underground in the cracks and spaces in soil, sand, and rock. It is naturally filtered as it percolates through the earth.
Step 2: Evaluate each statement.
Step 2:

(A) True. The ground acts as a natural filter, removing many pathogens, so groundwater is often free from them.
(B) False. Surface water (from rivers, lakes) is directly exposed to runoff, pollution, and airborne contaminants. Groundwater is protected by layers of soil and rock, making it *less* subject to contamination.
(C) True. Because of the natural filtration process, groundwater is generally considered microbiologically purer and superior to surface water.
(D) True. Aquifers (groundwater reservoirs) are large and less affected by short-term dry spells compared to rivers and lakes, providing a more reliable supply during dry seasons.
Step 3: Identify the false statement.
Step 3: Statement (B) incorrectly claims groundwater is more subject to contamination than surface water, which is the opposite of the truth.