Why can acid rain water be harmful for aquatic organisms?
Answer and explanation
Correct answer: It lowers the pH of water
Acid rain contains acidic substances formed when pollutants such as sulfur and nitrogen oxides react in the atmosphere. When this rain enters lakes, rivers, or ponds, it can lower their pH. Many aquatic organisms and their eggs require a limited pH range, so excessive acidity can disturb survival, reproduction, and mineral balance. Thus option A gives the correct general reason; the other claims are absolute or chemically incorrect.
Frequently asked questions
What is the correct answer to this question?
It lowers the pH of water
Why is this the correct answer?
Acid rain contains acidic substances formed when pollutants such as sulfur and nitrogen oxides react in the atmosphere. When this rain enters lakes, rivers, or ponds, it can lower their pH. Many aquatic organisms and their eggs require a limited pH range, so excessive acidity can disturb survival, reproduction, and mineral balance. Thus option A gives the correct general reason; the other claims are absolute or chemically incorrect.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
