Question

Paheli observed that most of the fish in the pond of her village were gradually dying. She also observed that the waste of a factory in their village is flowing into the pond which probably caused the fish to die.

(a.) Explain why the fish were dying.

(b.) If the factory waste is acidic in nature, how can it be neutralized?

Answer 1

Eutrophication:

1. Process in which a water body becomes enriched with nutrients and minerals.
2. Gradual increase in the concentration of phosphorus, nitrogen, and other nutrients.
3. Results of eutrophication-Harmful algal blooms and fish kills.

When the waste of a factory in the village is flowing into the pond, it probably caused the fish to die because:

(a.) Factory waste may contain a high concentration of basic or acidic chemicals. These chemicals make aquatic life difficult.

For neutralizing the acidic nature of factory waste:

(b.) By adding the base (limestone) into the water we can neutralize the factory waste.