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प्रश्न
Give a reason why –
Solids have a definite volume & a definite shape.
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उत्तर
Any matter that is solid has a definite shape and a definite volume. The molecules in a solid are in fixed positions and are dose together. Although the molecules can still vibrate, they cannot move from one part of the solid to another part. As a result, a solid does not easily change its shape or its volume.
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संबंधित प्रश्न
Fill in the blank:
Water is a matter because it has mas and occupies....................
Name the phenomenon which cause the following change:
Conversion of water into steam.
The process by which a solid changes into a liquid is called
- freezing
- melting
- condensation
- evaporation
Gases
- cannot be compressed easily,
- occupy the entire space of the container.
- have definite shapes.
- cannot flow.
When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room quickly. Which characteristic of the particles of matter is illustrated by this observation?
Fill in the following blank with suitable words :
The smell of perfume gradually spreads across a room due to .....................
Which one of the following statements is not true?
- the molecules in a solid vibrate about a fixed position
- the molecules in a liquid are arranged in a regular pattern
- the molecules in a gas exert negligibly small forces on each other, except during collisions
- the molecules of a gas occupy all the space available
State in which of the three states of matter:
The space between the particles is minimum.
Complete the statement by filling the blank with the correct word given below.
In naphthalene, the inter-particle attraction is _______.
Match the following.
| Property | Example |
| Breaks easily (Brittle) | Metal pan |
| Bends readily | Rubber band |
| Can be stretched easily | Cotton wool |
| Gets compressed easily | Mud pot |
| Gets heated readily | Plastic wire |
