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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.

Related tags

Acid RainAquatic LifePhAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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