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प्रश्न
Use your brain power!
How should roads and footpaths be built to make rainwater seep into the ground?
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उत्तर
If the entire road and footpaths are made of concrete. there would be a problem for rainwater to seep into the soil. Therefore, some adjoining parts of the road and footpath should be kept without concretization so that rainwater could seep inside. Similarly, if a little gap is maintained between the two adjacent tiles on the footpath, rainwater can percolate inside.
संबंधित प्रश्न
What is done to make drinking water clean and safe?
What works are undertaken to make water available even after the rainy season?
Explain the traditional ways of purifying water to make it fit for drinking.
Which of the following is a part of inorganic impurities of the sewage?
The process of adding chlorine in adequate amounts to water is called ______.
______ from the air and sunlight destroy the germs present in water.
Washing soda is used to remove permanent hardness of water.
Temporary and permanent hardness can be removed by the method of boiling.
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| 4. | Negative carbon electrode | d. | Hydrogen |
Name the chemical which converts chlorides and sulphates into insoluble carbonates.
