Why can acid rain be harmful to aquatic organisms?
Answer and explanation
Correct answer: It can lower the pH of water
The governing concept is pH and the effect of acidity on living organisms. Acid rain introduces acidic substances into lakes, ponds and rivers, so the water’s pH may fall below its normal range. Many aquatic organisms, eggs and plants are sensitive to such changes, which can disturb biological processes. Therefore option A is correct; sweetness, permanent alkalinity and colour alone do not explain the harm.
Frequently asked questions
What is the correct answer to this question?
It can lower the pH of water
Why is this the correct answer?
The governing concept is pH and the effect of acidity on living organisms. Acid rain introduces acidic substances into lakes, ponds and rivers, so the water’s pH may fall below its normal range. Many aquatic organisms, eggs and plants are sensitive to such changes, which can disturb biological processes. Therefore option A is correct; sweetness, permanent alkalinity and colour alone do not explain the harm.
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.
