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प्रश्न
Use your brain power !
How should roads and footpaths be built to make rainwater seep into the ground?
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?
Which, of the following procedures will give you water free from all impurities?
Find out the wrong statement and write it in its correct form.
Chlorination is a commonly used chemical method for killing germs in water.
Which of the following is a part of the inorganic impurities of the sewage?
Why are open drains a concern?
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.
Name the chemical which converts chlorides and sulphates into insoluble carbonates.
