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प्रश्न
Use of excessive .................... by farmers causes water pollution.
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उत्तर
Use of excessive fertilizers by farmers causes water pollution.
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संबंधित प्रश्न
Give the molecular formula of water ?
What are the main causes of water pollution ? How can it be controlled ?
Explain why:
Table salts become sticky on exposure to humid air during the rainy season.
What is the importance of dissolved impurities in water?
Give a reason why alcohol and water form a miscible mixture while oil & water do not.
Explain any two environmental impacts of an ‘oil spill’.
Give the influence of pressure.
Name or state the following:
A deliquescent salt of a trivalent metal.
Among the given options, which one is not correct for the use of large amounts of fertilisers and pesticides?
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 |
