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प्रश्न
Which of the following diffuses fastest and which the slowest?
Solid, Liquid, Gas Give reasons for your answer.
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उत्तर
Gases diffuse fastest and solids diffuse slowest when we compare solids, liquids and gases.
Explanation: Gases diffuse fast because the force of attraction between their particles is very low or negligible and there are vast spaces between the particles. The force of attraction between the particles of solids is very strong and there is no space between the particles due to their compact arrangement. As a result, rate of diffusion in solids is slowest.
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संबंधित प्रश्न
Arrange the following substances in increasing order of forces of attraction between particles -
water, sugar, oxygen
Which of the two diffuses faster : a liquid or a gas?
Name the three states of matter. Give one example of each.
Why do gases have neither a fixed shape nor a fixed volume?
Why does a gas exert pressure?
Why does a gas fill a vessel completely?
A student placed a gas jar containing air in the upside down position over a gas jar full of red-brown bromine vapours. He observed that the red-brown colour spread upwards into the jar containing air. Based on this observation, the student concluded that it is only the bromine vapour which moves up and diffuses into air in the upper jar, the air from the upper jar does not move down by diffusion into the lower jar containing bromine vapours. Do you agree with this conclusion of the student? Give reason for your answer.
How does the substance of gaseous particles change to a liquid state?
Comment upon the following:-
compressibility
Two gases A and B having molecular weights 60 and 45 respectively are enclosed in a vessel. The wt. of A is 0.50 g and that of B is 0.2 g. The total pressure of the mixture is 750 mm. The partial pressure of the gases B is ______ mm Hg.
