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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.
- Explain why the fish were dying.
- If the factory waste is acidic in nature, how can it be neutralised?
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Solution
- Since the factory waste is being disposed off in the river, it can kill the fish because factory waste may contain acids or bases or other toxic materials.
- If the factory waste is acidic in nature, it can be neutralised by adding basic substances like lime before disposing off in the river.
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