In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.
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.
(i) Both A and R are true and R is the correct explanation of A.
(ii) Both A and R are true but R is not the correct explanation of A.
(iii) A is true but R is false.
(iv)A is false but R is true.
We know that gases do not liquefy above their critical temperature, even on applying high pressure.
This is because as the temperature reaches above the critical temperature, the speed of the molecule becomes very high due to which the intermolecular attractions is not enough to hold the molecules together and hence they escape because of their high speed.
Now discussing the reason, we observed that the reason is true and is correct explanation of the assertion.
Hence, (i) option is correct.
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