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प्रश्न
Why does a gas exert pressure?
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उत्तर
When gas is stored in a container, the fast moving particles of the gas collide with each other and with the walls of the container; thus, exerting pressure on the walls of container.
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संबंधित प्रश्न
Write the full forms of the following
- LPG
- CNG
State two characteristic properties of a gas.
Explain why, diffusion occurs more quickly in a gas than in a liquid.
Why do gases diffuse very fast?
Look at the diagram on the right side. Jar A contains a red-brown gas whereas jar B contains a colourless gas. The two gas jars are separated by a galas plate placed between them
- What will happen when the glass plate between the two jars is pulled away?
- What name is given to the phenomenon which takes place?
- Name the brown gas which could be in jar A.
- Which is the colourless gas most likely to be present in jar B?
- Name one coloured solid and one colourless liquid which can show the same phenomenon.
The substance X normally exists in a physical state which can flow easily but does not fill its vessel completely. It also turns anhydrous copper sulphate blue. When substance X is cooled excessively, it changes into a substance Y which has a fixed shape as well as a fixed volume. If, however, the substance X is heated strongly, it changes into a substance Z which has neither a fixed shape nor a fixed volume.
- Name the substances (i) X (ii) Y and (iii) Z.
- What is the process of conversion of X into Y known as ?
- At which temperature X gets converted into Y ?
- What is the process of conversion of X into Z known as ?
- At which temperature X gets converted into Z ?
______ is not affected by gravity.
Comment upon the following:-
rigidity
Which of the following is false for gases?
A gaseous mixture of He and O2 is found to have a density of 0.518 gL-1 at 25° C and 720 torr. The mass percent of helium in this mixture is ______.
