What is the main harm when acidic waste is released directly into water bodies?
Answer and explanation
Correct answer: The pH of water may decrease and harm aquatic life
The governing environmental concept is pH and its effect on aquatic ecosystems. Direct discharge of acidic waste increases the hydrogen-ion concentration of water, so its pH decreases. If the change is large, fish, aquatic plants and microorganisms may be harmed because their biological processes require a suitable pH range. The other options describe impossible or unrelated changes. Treatment and neutralisation of waste before discharge can reduce this danger, so A is correct.
Frequently asked questions
What is the correct answer to this question?
The pH of water may decrease and harm aquatic life
Why is this the correct answer?
The governing environmental concept is pH and its effect on aquatic ecosystems. Direct discharge of acidic waste increases the hydrogen-ion concentration of water, so its pH decreases. If the change is large, fish, aquatic plants and microorganisms may be harmed because their biological processes require a suitable pH range. The other options describe impossible or unrelated changes. Treatment and neutralisation of waste before discharge can reduce this danger, so A is correct.
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.
