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प्रश्न
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?
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उत्तर
The spreading of fragrance of incense stick from a corner to the whole room indicates that particles of matter keep moving from higher to lower concentration.
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संबंधित प्रश्न
Name the three states of matter and define them.
Gases
- cannot be compressed easily,
- occupy the entire space of the container.
- have definite shapes.
- cannot flow.
Give reason:
A drop of ink added to water in a glass turns whole water blue.
Give reason Liquids can flow easily
Fill in the blank
The molecules are at a greater distance in ______ compared to liquids.
What is the general name of :
- rigid form of matter ?
- fluid forms of matter ?
Differentiate the general properties of solids, liquids and gases in the form of a table — with reference to free surfaces.
A crystal of iodine is placed in a closed flat bottom flask and heated. State how you would conclude from the observations seen, that interparticle space is minimum in solids and maximum in gases.
State the term which refers to the conversion of a substance on heating from.
- solid-state to liquid state
- liquid state to vapour state
- vapour state to liquid state
- liquid state to solid-state.
Air is not compressible.
