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प्रश्न
A bottle of perfume was opened in a room. The smell of its vapours spread in the entire room. Name the property of gases which is responsible for this behaviour of perfume vapours.
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उत्तर
When a bottle of perfume in opened, fragrance of perfume spreads in the whole room. This behaviour is due to larger spaces in between the tiny particles of gas and their random movements which leads to the process of diffusion.
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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 exerts pressure on the walls of the container.
Give one example of diffusion of gases in a liquid.
Explain why, when a bottle of perfume is opened in a room, we can smell it even from a considerable distance.
Why do gases diffuse very fast?
The space between ______ particles is the greatest one.
______ is not affected by gravity.
How does the substance of gaseous particles change to a liquid state?
Comment upon the following:-
shape
A gaseous mixture of He and O2 is found to have a density of 0.518 gL-1 at 25° C and 720 torr. The mass percent of helium in this mixture is ______.
