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प्रश्न
What is done to make drinking water clean and safe?
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उत्तर
Methods of settling and filtering will make the water clean. For making it safe, it is boiled for some time.
संबंधित प्रश्न
Use your brain power!
How should roads and footpaths be built to make rainwater seep into the ground?
What works are undertaken to make water available even after the rainy season?
Find out the wrong statement and write it in its correct form.
Chlorination is a commonly used chemical method for killing germs in water.
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?
______ 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.
Match the following:
| 1. | The density of pure water | a. | Inflammable air |
| 2. | Henry Cavendish | b. | Cathode |
| 3. | Hydrogen | c. | 1 g/cm3 |
| 4. | Negative carbon electrode | d. | Hydrogen |
Name the chemical which converts chlorides and sulphates into insoluble carbonates.
