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प्रश्न
Why do gases not have fixed shape?
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उत्तर
- Gases possess more intermolecular space and less forces of attraction.
- They can move freely at any direction.
- They have the property of filling the entire part of a container by taking the shape of the container.
So, gases do not have fixed shape.
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संबंधित प्रश्न
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.
When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance quickly spreads in the entire room. Name the process involved in this.
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.
When a gas jar full of air is placed upside down on a gas jar full of bromine vapours, the red-brown vapours of bromine from the lower jar go upward into the jar containing air. In this experiment :
Look at the diagram on the right side. Jar A contains a red-brown gas whereas jar B contains a colourless gas. The two gas jars are separated by a galas plate placed between them
- What will happen when the glass plate between the two jars is pulled away?
- What name is given to the phenomenon which takes place?
- Name the brown gas which could be in jar A.
- Which is the colourless gas most likely to be present in jar B?
- Name one coloured solid and one colourless liquid which can show the same phenomenon.
Comment upon the following:-
filling a gas container
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| Fig. I | Fig. II |
In figure-I, an air column of length ℓ1 is entrapped by a column of Hg of length 8 cm. In figure-II length of same air column at the same temperature is ℓ2. The `ℓ_1/ℓ_2` is:
(1 atm = 76 cm of Hg)
2 litre He gas at 2 atm and 300 K is inserted into a 4 litre rigid container containing N2 at 600 K and 4 atm. Finally mixture is maintained at 600 K temperature. The final pressure of gaseous mixture would be ______ torr.
