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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
Arrange the following substances in increasing order of forces of attraction between particles -
water, sugar, oxygen
Name the physical state of matter which can be easily compressed.
State whether the following statement is true or false :
Red-brown bromine vapour diffuse into air in a gas jar but the colourless air molecules do not diffuse into bromine vapour.
Fill in the following blank with suitable words :
At room temperature, the forces of attraction between the particles of solid substances are ....................... then those which exist in the gaseous state.
Why do gases have neither a fixed shape nor a fixed volume?
Give two reasons to justify that Water is a liquid at room temperature.
Give reason for the following observation :
The smell of hot sizzling food reaches us even from a considerable distance but to get the smell from cold food, we have to go close to it.
How does the substance of gaseous particles change to a liquid state?
Comment upon the following:-
compressibility
A gaseous mixture of He and O2 is found to have a density of 0.518 gL-1 at 25° C and 720 torr. The mass percent of helium in this mixture is ______.
