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प्रश्न
Explain the traditional ways of purifying water to make it fit for drinking.
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उत्तर
The various traditional ways of purifying water to make it fit for drinking are as follows:
- By filtering This is a physical method of removing impurities. A popular household water filter is a candle type water filter.
- By boiling When water is heated, it boils at a temperature of 100°C. At this high temperature, all the harmful microorganisms (or germs) present in water are killed and it becomes absolutely safe for drinking. Many households use boiling as a method for obtaining safe drinking water.
- Chlorination It is a commonly used chemical method for purifying water. It is done by adding chlorine tablets or bleaching powder to the water. Chlorine kills all the harmful microorganisms (or germs) present in water and makes it absolutely safe for drinking.
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संबंधित प्रश्न
What is done to make drinking water clean and safe?
Which of the following procedures will give you water free from all impurities?
Fill in the blanks with the help of words given in bracket after the sentence.
Water which looks clean still has disease carrying ______ and ______ impurities.
(insects, microorganisms, particles, dissolved, harmful)
Find out the wrong statement and write it in its correct form.
Chlorination is a commonly used chemical method for killing germs in water.
Find out the wrong statement and write it in its correct form.
Water that is suitable for drinking is called soft water.
The process of adding chlorine in adequate amounts to water is called ______.
______ from the air and sunlight destroy the germs present in 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.
