Question

Why does survival of aquatic life becomes difficult because of acid rain?

• A. When acid rain falls into the river, it lowers the pH of the river water.
• B. When acid rain falls into the river, it increases the pH of the river water.
• C. Acid rain does not cause any change in the river water.
• D. None of the above

Answer 1

The correct option is A When acid rain falls into the river, it lowers the pH of the river water.

The pH range of acid rain usually lies between 4.4 - 4.2

When acid rain falls in the river, it lowers the pH of the river water. Living organisms can only survive in a narrow range of pH. This lowering of pH makes the survival of living organisms in aquatic habitats difficult.

Hence, the correct answer is an option (A).