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प्रश्न
What's the solution?
We need to rub salt on a corncob, but only salt crystals are available.
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उत्तर
We can pound salt crystals. Either we can use mortar pestle or we can also crush the crystals of salt in a grinder. Such powdered salt can be easily applied on the corncob.
संबंधित प्रश्न
Match the following
| Column A | Column B | ||
| (a) | Molecules | (i) | Water boils |
| (b) | 100° C | (ii) | Evaporation |
| (c) | 0° C | (iii) | Changes from solid to gas |
| (d) | At all temperatures | (iv) | Matter |
| (e) | Camphor | (v) | Water freezes |
Classify the following into elements, compounds and mixtures:
- Sodium
- Soil
- Sugar solution
- Silver
- Calcium carbonate
- Tin
- Silicon
- Coal
- Air
- Soap
- Methane
- Carbon dioxide
- Blood
On the basis of composition of matter, milk is considered to be :
Name the process by which common salt is purified.
Fill in the following blanks with suitable words :
A heterogeneous mixture of liquid and solid is conveniently separated by...............
Fill in the following blanks with suitable words :
If a mixture contains iron filings as one of the constituents, it can be separated by using a .......................
How will you separate a mixture containing sand and sugar ?
How is scrap iron separated from a heap of waste materials in factories?
Which one of the following scrap metal cannot be separated by magnetic separation ?
Celsius scale is a scale of temperature in which zero represents the melting point of ice and 100 represents the boiling point of water.
