Advertisements
Advertisements
प्रश्न
A rubber ball changes its shape on pressing. Can it be called a solid?
उत्तर
Yes. A solid has a certain shape and size. The shape of a rubber ball changes only if we squeeze it.
APPEARS IN
संबंधित प्रश्न
Give two reasons to justify that An iron almirah is a solid.
Give two reasons for saying that wood is a solid.
Classify the following into solids, liquids and gases.
Oxygen, milk, common salt, wax, stone, L.P.G, carbon- dioxide, sugar, mercury, coal, blood, butter, copper, coconut oil, kerosene.
Give reasons
When a teaspoon of sugar is added to half a glass of water and stirred, the water level in the glass remains unchanged.
State the main physical properties of matter.
Describe simple experiments to prove that solids have mass
See the given pictures and write down the state of each object. (Solid, Liquid, Gas)
 |
 |
 |
 |
 |
| _____ | ______ | ______ | ______ | ______ |
 |
 |
 |
 |
 |
| ______ | _______ | ______ | ______ | ______ |
Discuss briefly on three states of matter.
What is the physical state of water at 0°C.
A strong current of trivalent gaseous boron passed through a silicon crystal decreases the density of the crystal due to part replacement of silicon by boron and due to interstitial vacancies created by missing Si atoms. In one such experiment, one gram of silicon is taken and the boron atoms are found to be 1000 ppm by weight, when the density of the Si crystal decreases by 12%. The percentage of missing vacancies due to silicon, which are filled up by boron atoms will be ____ g. [Given · Atomic wt. Si= 30, B = 11]
