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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 works are undertaken to make water available even after the rainy season?
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Fill in the blanks with the help of words given in bracket after the sentence.
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(insects, microorganisms, particles, dissolved, harmful)
Find out the wrong statement and write it in its correct form.
Water that is suitable for drinking is called soft water.
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Which of the following is a part of inorganic impurities of the sewage?
Why are open drains a concern?
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Temporary and permanent hardness can be removed by the method of boiling.
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| 4. | Negative carbon electrode | d. | Hydrogen |
