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प्रश्न
Comment upon the following:
rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density.
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उत्तर
- Rigidity: It is the property which helps a substance retain its shape when force is applied to it. Solids are rigid while gases and liquids are not.
- Compressibility: Compressibility is the property that allows particles of matter to be compressed or reduced in volume by applying force or pressure. Gases are very compressible.
- Fluidity: It is the tendency of a substance to flow. Liquids and gases possess fluidity while solids are rigid.
- Filling a gas container: Because of the minimal interparticle force of attraction, gas molecules can move in all directions and fill the container.
- Shape: Solids have a distinct shape, whereas liquids take on the shape of the container in which they are stored, and gases have no shape.
- Kinetic energy: Kinetic energy refers to the energy that particles contain as a result of their motion. Gas particles have the most kinetic energy because they can move freely in all directions. Solids have the lowest kinetic energy because their particles move the least.
- Density: Density refers to the mass of a substance per unit volume. Solids have the highest density because their molecules are tightly packed.
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संबंधित प्रश्न
The mass per unit volume of a substance is called density.
(density = mass/volume).
Arrange the following in order of increasing density-
air, exhaust from chimneys, honey, water, chalk, cotton and iron.
Give a reason for the following observation.
We can get the smell of perfume sitting several metres away.
State two characteristic properties of a gas.
What does the diffusion of gases tell us about their particles?
Why do gases diffuse very fast?
Name two gases of air which dissolve in water by diffusion. What is the importance of this process in nature?
Comment upon the following:-
rigidity
Comment upon the following:-
filling a gas container
Comment upon the following:-
density
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| Fig. I | Fig. II |
In figure-I, an air column of length ℓ1 is entrapped by a column of Hg of length 8 cm. In figure-II length of same air column at the same temperature is ℓ2. The `ℓ_1/ℓ_2` is:
(1 atm = 76 cm of Hg)
