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

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

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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. Therefore, they should first be treated with basic substances to neutralise them and then discharged into water bodies.

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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. Therefore, they should first be treated with basic substances to neutralise them and then discharged into water bodies.

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

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

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reverse osmosis or granulated activated carbon system can be used

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reverse osmosis or granulated activated carbon system can be used

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This treatment method is used if water is acidic (low pH). Soda ash (sodium carbonate) and sodium hydroxide raise the pH of water to near neutral when injected into a water system. Unlike neutralizing filters, they do not cause hardness problems in treated water.

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This treatment method is used if water is acidic (low pH). Soda ash (sodium carbonate) and sodium hydroxide raise the pH of water to near neutral when injected into a water system. Unlike neutralizing filters, they do not cause hardness problems in treated water.

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

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

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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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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.