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प्रश्न
Explain the following :
When an incense stick is lighted in the corner of a room, its fragrance spreads quickly in the entire room.
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उत्तर
The fragrance of lit incense stick spreads quickly in the room because the particles of matter are continuously moving in all directions. Both air and fragrance of incense stick have large intermolecular spaces. Due to this, the particles of one can easily occupy the inter-molecular spaces of the other.
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संबंधित प्रश्न
Write your observation and conclusion for the following:
When one of the balloons suspended to the metre scale is punctured while other remains inflated ?
Write whether the following statement is true or false.
Intermolecular force of attraction is greater in gases than in liquids.
For the following statement, say whether it describes a solid, a liquid or a gas.
Particles are far apart and move in all directions.
Match the columns.
| (1) iron and gold | (a) molecules are very far apart |
| (2) melting | (b) pure substance |
| (3) intermolecular space | (c) non - metals |
| (4) compound | (d) the space between the molecules |
| (5) gases | (e) change from solid to liquid |
| (f) metals |
Give reason
A red ink drop added to small amount of water in a glass turns water red in some time.
Write whether the following statement are true or false.
Solids have the largest inter-molecular space.
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
Define the Solid and give two examples.
State in which of the three states of matter:
Are the atoms or particles far apart
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.
