List the points of differences between homogeneous and heterogeneous mixtures.
|
Homogeneous mixture |
Heterogeneous mixture |
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It is the mixture in which different constituents are mixed uniformly. |
It is the mixture in which different constitutes are not mixed uniformly |
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They cannot have physically distinct parts. |
They have physically distinct parts. |
|
The constituents cannot be easily seen. |
The constituents can be easily seen. |
|
The constituents cannot be easily separated. |
The constituents can be easily separated. |
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Example: sugar solution, soda water, soft drinks, vinegar, air etc. |
Example: sugar and sand mixture, milk, ink, paint, etc. |
Tabulate the differences in the characteristics of states of matter.
|
S.No |
Solid state |
Liquid state |
Gaseous state |
|
1 |
Definite shape and volume |
No definite shape. Liquids attain the shape of the vessel in which they kept. |
Gases have neither a definite shape nor a definite volume. |
|
2. |
There is little space between the particles of solid. |
These particles have a greater space between them. |
The space between gas particles is the greatest. |
|
3. |
Incompressible |
Compressible |
Highly compressible |
|
4. |
These particles attract each other very strongly |
The force of attraction between liquid particles is less than solid particles |
The force of attraction is least between gaseous particles.
|
|
5. |
Rigid |
These particles move freely |
Gaseous particles are in a continuous, random motion. |
|
|
|
|
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Give reasons:
A gas exerts pressure on the walls of the container.
Particles of gas move randomly in all directions at high speed. As a result, the particles hit each other and also hit the walls of the container with a force. Therefore, gas exerts pressure on the walls of the container.
Give reasons:
A gas fills completely the vessel in which it is kept.
This is because the gases have large inter-particle spaces and the inter-particle attraction force is very weak. The gaseous particle can move freely into the empty spaces of another gas as particles of gas have very high kinetic energy. This property of gases is called diffusion. A gas can mix with any other gas easily and move rapidly from one part of vessel to another part of vessel. Therefore, gas particles can spread easily and fill the whole vessel.
Give reasons:
A wooden table should be called a solid.
A wooden table has a definite shape and volume. It is very rigid and cannot be compressed i.e., it has the characteristics of a solid. Hence, a wooden table should be called a solid.
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.
Particles of air have large spaces between them. On the other hand, wood has little space between its particles. Also, it is rigid. For this reason, we can easily move our hands in air, but to do the same through a solid block of wood, we need a karate expert.
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