Acid rain lowers the pH of a lake. Why can this seriously affect aquatic organisms?
Answer and explanation
Correct answer: Low pH can disturb life processes of many organisms
The governing concept is that pH measures the acidic or basic condition of water and strongly influences biological and chemical processes. Acid rain introduces acidic substances, lowering lake pH. Excess acidity can interfere with enzyme activity, reproduction, respiration, and the survival of sensitive aquatic organisms; it may also affect dissolved minerals. Thus option A is correct, while the other statements contradict the meaning of low pH.
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What is the correct answer to this question?
Low pH can disturb life processes of many organisms
Why is this the correct answer?
The governing concept is that pH measures the acidic or basic condition of water and strongly influences biological and chemical processes. Acid rain introduces acidic substances, lowering lake pH. Excess acidity can interfere with enzyme activity, reproduction, respiration, and the survival of sensitive aquatic organisms; it may also affect dissolved minerals. Thus option A is correct, while the other statements contradict the meaning of low pH.
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.
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