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प्रश्न
Paheli was feeling thirsty but there was only a pot of water at home which was muddy and unfit for drinking. How do you think Paheli would have made this water fit for drinking if the following materials were available to her.
| Alum | tub | muslin cloth | gas stove | thread | pan and lid |
उत्तर
With the following materials available to Paheli – alum, tub, muslin cloth, gas stove, thread, pan and lid, she could undertake the following steps to purify water.
- Filter the muddy water with the help of muslin cloth.
- Tie the piece of alum with thread and sink in water for some time and then leave water undisturbed.
- After some time, the impurities will settle down and the water from the top can be decanted.
- Boil the decanted water for about 10 minutes in a covered pan. Cool and filter the water.
- The filtered water is fit for drinking.
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संबंधित प्रश्न
Discuss the importance of water as a solvent for plants.
What is the importance of dissolved salts in water?
Explain the terms:
Solvent
State the term: (Do not give examples)
A solution where solvent is a liquid other than water.
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Why does the hardness of water render it unfit for use in a boiler.
Give a reason why water is called a ‘universal solvent’ but, an alkali is not.
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Give a reason for the following.
Water is a universal solvent.
State whether the following statement is true or false.
Water can be separated from salt by evaporation.
