Which of the following is correct for critical temperature ?

Options

A. It is the highest temperature at which liquid and vapour can coexist
B. Beyond this temperature, the gas and the liquid phase have different critical densities
C. At this temperature, the gas and the liquid phase have different critical densities
D. All are correct

Answer

A, B

Explanation

The critical temperature is the highest temperature at which a gas can be liquefied. At this temperature the gas and liquid have same critical density.