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प्रश्न
Give a reason for the following observation.
We can get the smell of perfume sitting several metres away.
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उत्तर
Perfume is also a volatile liquid. It immediately turns into vapour and diffuses into the air, which is why we can smell it even if we are sitting far away. This phenomenon occurs as a result of diffusion.
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.
Tabulate the differences in the characteristics of states of matter.
Give reasons:
A gas fills completely the vessel in which it is kept.
Write the full forms of the following
- LPG
- CNG
Give reason for the following observation :
The smell of hot sizzling food reaches us even from a considerable distance but to get the smell from cold food, we have to go close to it.
Why does a gas fill a vessel completely?
Why do gases not have fixed shape?
Comment upon the following:-
compressibility
Comment upon the following:-
filling a gas container
Which of the following is false for gases?
