Q. Which of the following is correct for critical temperature?
A) It is the lowest temperature at which liquid and vapour can coexist
B) Beyond the critical temperature, there is no distinction between the two phases and a gas cannot be liquefied by compression
C) At critical temperature, the surface tension of the system is not zero
D) At critical temperature, the gas and the liquid phases have different critical densities
Explanation
The correct answer is Option B: Beyond the critical temperature, there is no distinction between the two phases and a gas cannot be liquefied by compression.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.