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प्रश्न
Give reasons
The odour of scent spreads in a room.
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उत्तर
Scent fumes (molecules) being gases fill the spaces between air molecules and the molecules of air fill the spaces between scent molecules due to diffusion, fumes spread into a room
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संबंधित प्रश्न
How do solids, liquids and gases differ in shape and volume?
Compare the properties of solids, liquids and gases in tabular form.
Name the smallest particle from which matter is made up.
Classify the following into solids, liquids and gases.
Oxygen, milk, common salt, wax, stone, L.P.G, carbon- dioxide, sugar, mercury, coal, blood, butter, copper, coconut oil, kerosene.
Give reasons
Liquids and gases flow but solids do not?
Write whether the following statements are true or false:
Only water can exist in three different states
Describe simple experiments to prove that gases have mass.
Strainer is a kind of sieve which is used to separate a liquid from solid.
Complete the given analogy.
Solid: Definite shape:: ______: Shape of the vessel.
A strong current of trivalent gaseous boron passed through a silicon crystal decreases the density of the crystal due to part replacement of silicon by boron and due to interstitial vacancies created by missing Si atoms. In one such experiment, one gram of silicon is taken and the boron atoms are found to be 1000 ppm by weight, when the density of the Si crystal decreases by 12%. The percentage of missing vacancies due to silicon, which are filled up by boron atoms will be ____ g. [Given · Atomic wt. Si= 30, B = 11]
