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प्रश्न
Give reasons
A gas fills up the space available to it.
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उत्तर
The intermolecular force of attraction is least and intermolecular spaces are very large, hence gases can fill up the space available to them.
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संबंधित प्रश्न
Give one difference between atoms and molecules.
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
Liquids have definite volume but no definite shape
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.
Matter in any state is composed of particles. Compare the three states of matter i,e. solids, liquids, and gases with reference to:
(a) intermolecular space
(b) the intermolecular force of attraction
(c) movement of particles
Describe simple experiments to prove that liquids have a definite volume
Describe simple experiments to prove that liquids have no definite shape
Describe simple experiments to prove that gases have no definite volume or shape.
How the matter is grouped on the basis of physical states?
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]
