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प्रश्न
Give a reason for the following observation.
We can get the smell of perfume sitting several metres away.
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उत्तर
Perfume is also a volatile liquid. It immediately turns into vapour and diffuses into the air, which is why we can smell it even if we are sitting far away. This phenomenon occurs as a result of diffusion.
संबंधित प्रश्न
Write the full forms of the following
- LPG
- CNG
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Red-brown bromine vapour diffuse into air in a gas jar but the colourless air molecules do not diffuse into bromine vapour.
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Fill in the following blank with suitable words :
At room temperature, the forces of attraction between the particles of solid substances are ....................... then those which exist in the gaseous state.
Explain why, when a bottle of perfume is opened in a room, we can smell it even from a considerable distance.
Why does a gas exert pressure?
A substance has neither a fixed shape nor a fixed volume. State whether it is a solid, a liquid or a gas.
Which of the following is false for gases?
Explain why?
- A gas fills a vessel completely?
- Camphor disappears without leaving any residue.
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 ______.
