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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.
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संबंधित प्रश्न
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.
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.
What does the diffusion of gases tell us about their particles?
Explain how, the smell of food being cooked in the kitchen reaches us even from a considerable distance.
Name two gases of air which dissolve in water by diffusion. What is the importance of this process in nature?
When a gas jar containing colourless air is kept upside down over a gas jar full of brown-coloured bromine vapour, then after some time, the brown colour of bromine vapour spreads into the upper gas jar making both the gas jars appear brown in colour. Which of the following conclusion obtained from these observations is incorrect?
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.
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.
