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प्रश्न
Comment upon the following:-
shape
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उत्तर
The shape defines a definite boundary.
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संबंधित प्रश्न
Give reasons:
A gas exerts pressure on the walls of the container.
Arrange the following substances in increasing order of forces of attraction between particles -
water, sugar, oxygen
Write the full forms of the following
- LPG
- CNG
State whether the following statement is true or false :
Red-brown bromine vapour diffuse into air in a gas jar but the colourless air molecules do not diffuse into bromine vapour.
Which of the following diffuses fastest and which the slowest?
Solid, Liquid, Gas Give reasons for your answer.
Explain why, diffusion occurs more quickly in a gas than in a liquid.
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.
______ is not affected by gravity.
Comment upon the following:-
filling a gas container
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.
