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Question) Students of grade VII while doing a project on river Yamuna, found that the water of Yamuna is acidic beyond limits as the factory wastes are dumped into the river. They wrote to the Municipal Corporation of the state suggesting ways to reduce this kind of pollution.

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Question) Students of grade VII while doing a project on river Yamuna, found that the water of Yamuna is acidic beyond limits as the factory wastes are dumped into the river. They wrote to the Municipal Corporation of the state suggesting ways to reduce this kind of pollution.

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 Question) Why do you think it is important to treat the factory wastes before they are dumped into the rivers?

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 Question) Why do you think it is important to treat the factory wastes before they are dumped into the rivers?

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Ans)Factory wastes contain acids which if untreated and discharged into water bodies will cause harm to fish and other aquatic organisms living in water bodies.

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 Question) How does neutralisation reaction play an important role in our daily life. Explain by giving any three examples

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 Question) How does neutralisation reaction play an important role in our daily life. Explain by giving any three examples

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Ans)1-Vinegar is used to cure wasp stings because vinegar can neutralise the stings
2-Our stomach produces hydrochloric acid which helps us in the digestion process.
3-Anti-acids are medicines containing bases such as aluminium hydroxide,  and magnesium hydroxide, to neutralise the excess acid in the stomach.

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Question) If you are one of them, suggest two ways to reduce the acidity of river Yamuna.

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Question) If you are one of them, suggest two ways to reduce the acidity of river Yamuna.

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Ans) construction waste should not be thrown in the river.
public awareness should be spread regarding effects of water pollution and how to prevent it.