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प्रश्न
Give reasons:
A gas fills completely the vessel in which it is kept.
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उत्तर
- The kinetic energy in a gas is maximum due to the low force of attraction between the particles in which it is kept.
- The gas particles are constantly travelling in all directions at different speeds.
- As a result, they have no definite volume and, hence, completely fill the vessel in which they are kept.
संबंधित प्रश्न
Give a reason for the following observation.
We can get the smell of perfume sitting several metres away.
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.
A girl is cooking some food in the kitchen. The smell of food being cooked soon reaches her brother's room. Explain how the smell could have reached her brother's room.
Explain why, when a bottle of perfume is opened in a room, we can smell it even from a considerable distance.
Comment upon the following:-
fluidity
Comment upon the following:-
filling a gas container
Comment upon the following:-
kinetic energy
Comment upon the following:-
density
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 ______.
