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प्रश्न
Give reasons
A red ink drop added to small amount of water in a glass turns the water red in some time.
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उत्तर
When we put a drop of red ink in a glass of water, its particles diffuse with particles of water slowly but continuously and the water turns red
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संबंधित प्रश्न
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.
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The physical state of a substance, which has neither fixed volume nor fixed shape is a ______.
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Only water can exist in three different states
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Chlorine gas has a – strong irritating odor.
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Sodium nitrate is soluble in water, but calcium carbonate is not.
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Strainer is a kind of sieve which is used to separate a liquid from solid.
Gases have neither a definite shape nor a definite volume.
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]
