Why can acid rain be harmful for organisms in lakes?
Answer and explanation
Correct answer: It can lower water pH
The governing concept is the effect of acids on pH and aquatic life. Acid rain carries acidic substances into lakes, where they can lower the water’s pH. Many aquatic organisms require a limited pH range for enzyme activity, growth, reproduction, and shell formation. Consequently, excessive acidity can disturb the ecosystem, making option A correct. It does not make water sweet or always basic, and its effect is not merely a colour change.
Frequently asked questions
What is the correct answer to this question?
It can lower water pH
Why is this the correct answer?
The governing concept is the effect of acids on pH and aquatic life. Acid rain carries acidic substances into lakes, where they can lower the water’s pH. Many aquatic organisms require a limited pH range for enzyme activity, growth, reproduction, and shell formation. Consequently, excessive acidity can disturb the ecosystem, making option A correct. It does not make water sweet or always basic, and its effect is not merely a colour change.
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.
