Assertion (A) : Gases do not liquefy above their critical temperature even on applying high pressure. Reason (R ) : Above critical temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed.A. Both A and R are true and R is the correct explanation of A.B. Both A and R are true R is not the correct explanation of A.C. A is true but R is false.D. A is false but R is true.

Assertion (A) : Gases do not liquefy above their critical temperature

1.	Assertion (A) : Gases do not liquefy above their critical temperature even on applying high pressure. Reason (R ) : Above critical temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed.A. Both A and R are true and R is the correct explanation of A.B. Both A and R are true R is not the correct explanation of A.C. A is true but R is false.D. A is false but R is true.
Answer» Correct Answer - A

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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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