A bottle of perfume was opened in a room. The smell of its vapours spread in the entire room. Name the property of gases which is responsible for this behaviour of perfume vapours.

Academic Chemistry NCERT Class 9

A bottle of perfume was opened in a room. The smell of its vapours spread in the entire room. Diffusion is the property of gases that is responsible for this behavior of perfume.

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Updated on: 10-Oct-2022

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Explain why, when a bottle of perfume is opened in a room, we can smell it even from a considerable distance.
(a) 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.(b) 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 the following :When an incense stick is lighted in the corner of a room, its fragrance spreads quickly in the entire room.
Which of the following are matter?Chair, air, love, smell, hate, almonds, thought, cold, cold-drink, smell of perfume.
When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room quickly. Which characteristic of the particles of matter is illustrated by this observation?
The breadth of a room is twice its height, one half of its length and the volume of the room is $512$ cu. dm. Find its dimensions.
How can we smell perfume sitting several meters away from the source ?
Name the metal which is liquid at room temperature.
A neutral organic compound is warmed with some ethanoic acid and a little of conc. H2SO4. Vapours having sweet smell (fruity smell) are evolved. What type of functional group is present in this organic compound?
Fill in the following blanks with suitable words :(a) The best evidence that the particles of matter are constantly moving comes from the studies of ................. and ...................(b) The smell of perfume gradually spreads across a room due to .....................(c) Solid, liquid, and gas are the three ........................ of matter.(d) At room temperature, the forces of attraction between the particles of solid substances are ....................... then those which exist in the gaseous state.(e) The arrangement of particles is less ordered in the ...................... state. However, there is no order in the ..................... state.
Give a reason for the following observations.(a) Naphthalene balls disappear with time without leaving any solid.(b) We can get the smell of perfume sitting several meters away.
Choose the correct statement of the following(a) Conversion of solid into vapours without passing through the liquid state is called sublimation.(b) Conversion of vapours into solid without passing through the liquid state is called vaporisation.(c) Conversion of vapours into solid without passing through the liquid state is called freezing.(d) Conversion of solid into liquid is called sublimation.
The cost of carpeting a 15m long room with a 75 cm wide carpet at 9â‚¹ per metre is 2160â‚¹. find the breadth of the room .
The temperature at which liquids change into vapours is very high, for example, water vaporises at 100°C then how is it possible for water to evaporate at room temperature or at other temperature?
Name the property of earth which is responsible for extremely small acceleration being produced in it as a result of attraction by other small objects.

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