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प्रश्न
What is meant by 'diffusion'? Give one example of diffusion in gases.
उत्तर
Diffusion: In Latin, the word “diffusion” means to “spread out”. Diffusion is the mixing of a substance with another substance due to the motion of its particles. It is one of the several transport phenomena that occur in nature. The spreading of the smell of perfume in the whole room is an example of diffusion.
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संबंधित प्रश्न
Define the following terms.
Atom
Fill in the blank:
Any matter which has a definite.................... but no definite shape is called a...............
A solid is a state of matter that has
- no definite shape.
- large intermolecuiar space.
- high intermolecuiar force of attraction.
- no definite volume.
How will you prove by an experiment that solids occupy space ?
Write true or false for each statement. Rewrite the false statement correctly.
If the intermolecular space is more than the intermolecular force will be weaker.
Give reasons for the following:
Water on freezing turns into ice.
Name the three states of matter.
Differentiate the general properties of solids, liquids and gases in the form of a table — with reference to mass
Match the characteristics of the three states of matter in List I with their correct answer from List II.
| List I | List II |
| 1. Have no definite shape, volume or free surface | A: Solids only |
| 2. Are highly compressible and least rigid | B: Liquids only |
| 3. Have a definite volume, no definite shape and are slightly diffusable | C: Gases only |
| 4. Are not compressible and have no diffusability | D: Liquids and gases only |
| 5. Have mass and occupy space | E: Solids and gases only |
| F: Solids, liquids and gases |
In which of the three states of matter – solids, liquids, or gases is the movement of atoms about their own position. Give a reason for the same.
