A gas is liquefiedA. above critical temperature and below critical pressureB. below critical temperature and above critical pressureC. below critical temperature and pressureD. above critical temperature and pressure

A gas is liquefiedA. above critical temperature and below critical pre

1.	A gas is liquefiedA. above critical temperature and below critical pressureB. below critical temperature and above critical pressureC. below critical temperature and pressureD. above critical temperature and pressure
Answer» Correct Answer - B Every substance has a critical temperature `(T_(c ))` above which its gas form cannot be made to liquefy , no matter how great at which a substance can exist as a liquid. The minimum pressure that must be applied to bring about liqueficiation at the critical temperature is called the critical pressure `(p_(c))`.

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The gases obey the different gas laws only theoretically. Practically all of them show some deviation from these laws. These are called real gases. The deviation are maximum under high pressyre and at low temperature. These are comparatively small when the conditions are reversed. It has been found that the easily liquefiable gases show more deviations from the ideal gas beheviour as compared to the gases which are liqufied with diffculty. Gas deviates from ideal gas beheviour because moleculesA. are coloulessB. attract each otherC. contain covalent bondD. show Brownian Movement.
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A gas is liquefiedA. above critical temperature and below critical pressureB. below critical temperature and above critical pressureC. below critical temperature and pressureD. above critical temperature and pressure

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