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प्रश्न
Fill in the following blank with suitable words :
The smell of perfume gradually spreads across a room due to .....................
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उत्तर
The smell of perfume gradually spreads across a room due to diffusion.
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संबंधित प्रश्न
Which of the following are matter?
Chair, air, love, smell, hate, almonds, thought, cold, lemon water, smell of perfume.
Give reasons for the following observation:
The smell of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close.
For the following statement, say whether it describe a solid, a liquid or a gas.
Particles are quite close together.
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 drop of ink added to water in a glass turns whole water blue.
Write whether the following statement are true or false.
Intermolecular force of attraction is greater in gases than in liquids.
State two characteristics of matter demonstrated by diffusion.
Differentiate the general properties of solids, liquids and gases in the form of a table — with reference to shape.
‘Inter-particle attraction between atoms of gases is very weak’. State five properties of gases which correlate as a consequence of the weak inter-particle attraction between particles of gases.
With reference to the liquid state of matter – answer the following
State why the inter-particles attraction decreases to negligible.
