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
How do the solubility of a solid and a gas affected by Increase in temperature.
Give two examples of Drying agent.
Give reason for Table salt becomes moist during rainy season.
'Water is the universal solvent'. Comment.
What are the observations and conclusions when tap water is boiled and evaporated in watch glass?
State the term: (Do not give examples)
A solution where solvent is a liquid other than water.
What is soap? For what is it used?
Give a reason why water is called a ‘universal solvent’ but, an alkali is not.
Select the correct answer of the following statement:
The medium of dissolution which allows the solute to dissolve in it.
Take two pots with similar plants. Water one of the plants with tap water and the other with seawater. Record your findings and note the difference observed.
