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प्रश्न
Give reasons
When an empty gas jar is inverted over a gas jar containing a coloured gas, the gas also spreads into the empty jar
उत्तर
This is because Gases can diffuse or flow in all directions.
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संबंधित प्रश्न
Give one example of the diffusion of a solid in another solid.
Explain why, the diffusion of a solid in another solid is a very slow process.
State two characteristic properties of a solid.
Give reasons
Liquids have definite volume but no definite shape
For the following statement, say whether it describes a solid, a liquid or a gas.
Particles are far apart and move in all directions
Describe simple experiments to prove that gases have mass.
Discuss briefly on three states of matter.
Particles in solids are free to move.
Which of the following are homogeneous in nature?
- ice
- wood
- soil
- Air
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]
