Advertisements
Advertisements
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 |
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Discuss the importance of water as a solvent for our body .
What do you mean by solubility of a solute in a solvent ?
State the term: (Do not give examples)
A solution where solvent is a liquid other than water.
Explain why:
The solute cannot be separated from a solution by filtration.
In which of the following substances will there be
Increase in mass
In which of the following substances will there be
Decrease in mass
Name the gas that:
Does not affect acidified K2Cr2O7 paper but turns lime water milky.
Give a reason why boiled water tastes flat.
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.
