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प्रश्न
State the causes of ‘eutrophication’.
What is the reason of eutrophication?
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उत्तर
Eutrophication is caused by a sudden influx of phosphorus into water bodies. This is caused by agricultural runoff or industrial effluents with high phosphate content.
संबंधित प्रश्न
Name the gas produced when steam is passed over hot coke.
Name the gas produced when fossil fuel is burnt.
What are its causes and how can water pollution be controlled ?
Give balanced chemical equations to show the reaction between Coke and steam.
State what is potable water. Give its qualities or characteristics which make it fit for human consumption.
Give the importance of dissolved air – in water.
Give a balanced equation for the following conversion:
Calcium sulphate in permanent hard water to calcium carbonate using sodium carbonate.
State whether the following statement is True or False. If false, give the correct statement.
51% of the earth’s surface is covered with water
Match the items of Column I with the items of Column II with reference to sewage.
| Column I | Column II | ||
| (a) | Inorganic impurities | (i) | phosphorus and nitrogen |
| (b) | Organic impurities | (ii) | nitrates and phosphates |
| (c) | Nutrients | (iii) | cholera and typhoid |
| (d) | Bacteria | (iv) | pesticides and herbicides |
Why is there a need for conserving water? Give two reasons.
