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प्रश्न
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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उत्तर
- 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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संबंधित प्रश्न
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Which of the following is acidic in nature?
Match the substances in Column I with those in Column II.
| Column 1 | Column II | ||
| (a) | Tartaric acid | (i) | soap |
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| (c) | Formic acid | (iii) | unripe mangoes |
| (d) | Sodium hydroxide | (iv) | ant’s sting |
| (e) | Lactic acid | (v) | lime water |
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