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प्रश्न
Explain why, when a bottle of perfume is opened in a room, we can smell it even from a considerable distance.
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उत्तर
When a bottle of perfume is opened in a room, the particles of perfume, start diffusing into the air surrounding the bottle. These particles of perfume keep moving towards a region of lower concentration by the virtue of their kinetic energy. Thus, when a bottle of perfume is opened, we can smell perfume even from a distance.
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संबंधित प्रश्न
The mass per unit volume of a substance is called density.
(density = mass/volume).
Arrange the following in order of increasing density-
air, exhaust from chimneys, honey, water, chalk, cotton and iron.
Give reasons:
A gas fills completely the vessel in which it is kept.
A girl is cooking some food in the kitchen. The smell of food being cooked soon reaches her brother's room. Explain how the smell could have reached her brother's room.
Name two gases of air which dissolve in water by diffusion. What is the importance of this process in nature?
Why does a gas fill a vessel completely?
The space between ______ particles is the greatest one.
Comment upon the following:-
rigidity
Comment upon the following:-
kinetic energy
Which of the following is false for gases?
Explain why?
- A gas fills a vessel completely?
- Camphor disappears without leaving any residue.
