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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
Name the source from which litmus solution is obtained. What is the use of this solution?
Name the gas evolved when dilute HCl reacts with sodium hydrogencarbonate. How is it recognised?
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The indicator which produces a pink colour in an alkaline solution is:
(a) methyl orange
(b) turmeric paper
(c) phenolphthalein
(d) litmus paper
What happens to the H+ ions, of the solution, when an acid is neutralised?
What effect does the concentration of H+ (aq) ions have on the nature of a solution?
Give four examples of preparation of acids by synthesis.
In acidic solutions blue litmus changes into ______ colour.
State whether the following statement is true or false. Correct the false statement.
A compound if acidic will turn all indicators red.
Complete the following equation.
ZnO + 2HCl → ______ + ______.
