Two different gases 'A' and 'B' are filled in separate containers of equal capacity under the same conditions of temperature and pressure. On increasing the pressure slightly, the gas 'A' liquifies but gas 'B' does not liquefy even on applying high pressure until it is cooled.
Explain this phenomenon.

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Solution

The behaviour of two gases at increasing pressure is different means they have different critical temperature.
"A" gas has low critical temperature that's why on applying pressure it is liquified.
"B" gas has high critical temperature so "B" needs to cool even on application of pressure.

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