Q. 47

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.

Answer :

(i)

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.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Laws of states of matterLaws of states of matterLaws of states of matter44 mins
Measurement of Pressure & Dalton's Law.Measurement of Pressure & Dalton's Law.Measurement of Pressure & Dalton's Law.64 mins
Interactive quiz on liquefactionInteractive quiz on liquefactionInteractive quiz on liquefaction44 mins
Liquefaction of gasesLiquefaction of gasesLiquefaction of gases53 mins
Gaseous state- interactive quizGaseous state- interactive quizGaseous state- interactive quiz56 mins
Interactive quiz on Kinetic Theory and Real Gas equationInteractive quiz on Kinetic Theory and Real Gas equationInteractive quiz on Kinetic Theory and Real Gas equation52 mins
Interactive quiz on Measurement of Pressure & Dalton's Law.Interactive quiz on Measurement of Pressure & Dalton's Law.Interactive quiz on Measurement of Pressure & Dalton's Law.49 mins
Interactive quiz on gas lawsInteractive quiz on gas lawsInteractive quiz on gas laws53 mins
Kinetic Theory and Real Gas equationKinetic Theory and Real Gas equationKinetic Theory and Real Gas equation60 mins
Gas laws | Everything you need to knowGas laws | Everything you need to knowGas laws | Everything you need to know60 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses