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प्रश्न
Explain briefly, how gases can be liquefied.
उत्तर
Gases can be liquefied by applying high pressure and lowering the temperature. Lowering the temperature decreases the kinetic energy of molecules of gas, and increasing the pressure, decreases the space between these particles. Both these effects, cause the molecules to come closer and lead to increase in the intermolecular force of attraction between these molecules. As a result, gas converts into liquid.
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संबंधित प्रश्न
Convert the following temperature to Celsius scale:
300 K
Mention a change which is always desirable.
Give an example of desirable change which can also be undesirable.
Explain why, a small volume of water in a kettle can fill a kitchen with steam.
The boiling point of alcohol is 78° C. What is this temperature on Kelvin scale ?
Fill in the following blank with suitable words :
Gases can be liquefied by applying ....................... and lowering .....................
Fill in the following blank with suitable words :
Temp on Kelvin scale = Temp on Celsius scale + ........................
Which of the following factors are responsible for the change in state of solid carbon dioxide when kept exposed to air ?
- increase in pressure
- ncrease in temperature
- decrease in pressure
- decrease in temperature
When water is cooled to a temperature x, it gets converted into ice at temperature x by a process called P. And when ice at temperature x is warmed, it gets reconverted into water at the same temperature x in a process called Q.
- What is the value of temperature x in Kelvin ?
- What is the process P known as ?
- What is the name of energy released during process P ?
- What is the process Q known as ?
- What is the name of energy absorbed during process Q ?
Fill in the blank with the correct word Given below.
Intermingling of molecules is called ____
