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प्रश्न
State the property of the following substance.
The melting point of ice is 0°C.
पर्याय
Physical
Chemical
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उत्तर
Physical
संबंधित प्रश्न
Give one difference between atoms and molecules.
Give reasons
A gas fills up the space available to it.
Write whether the following statement is true or false:
If the container in which a gas is collected has an opening, the gas will flow out and spread itself indefinitely
To identify materials of common use
Procedure – Just move around in your house – in the drawing room, sitting room, bedroom, kitchen, bathroom etc. Identify the things and All in the blanks in the table given below
| No. | Place | Name of the thing | Material used for making the thing |
| 1 | Study room | ||
| 2 | Drawing room | ||
| 3 | Kitchen | ||
| 4 | bathroom | ||
| 5 | Any other place |
State the main physical properties of matter.
Describe simple experiments to prove that liquids have a definite volume
Particles in solids are free to move.
______ has definite shape and volume.
What is the physical state of water at 100ºC?
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]
