Advertisements
Advertisements
प्रश्न
Comment upon the following:
rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density.
Advertisements
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.
APPEARS IN
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.
Tabulate the differences in the characteristics of states of matter.
Give reasons:
We can easily move our hand in air, but to do the same through a solid block of wood, we need a karate expert.
Give a reason for the following observation.
We can get the smell of perfume sitting several metres away.
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.
When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance quickly spreads in the entire room. Name the process involved in this.
A girl is cooking some food in the kitchen. The smell of food being cooked soon reaches her brother's room. Explain how the smell could have reached her brother's room.
A student placed a gas jar containing air in the upside down position over a gas jar full of red-brown bromine vapours. He observed that the red-brown colour spread upwards into the jar containing air. Based on this observation, the student concluded that it is only the bromine vapour which moves up and diffuses into air in the upper jar, the air from the upper jar does not move down by diffusion into the lower jar containing bromine vapours. Do you agree with this conclusion of the student? Give reason for your answer.
The space between ______ particles is the greatest one.
Comment upon the following:-
fluidity
