What is the value of the critical temperature of water (in $K$)?

What will be the phase of $CO_2$ at critical pressure $P_C$ and temperatures of $13.1^{\circ}C$,$31.5^{\circ}C$,$50^{\circ}C$,and $30.98^{\circ}C$?

Identify the incorrect statement regarding the properties of liquids and vapors.

The critical temperatures for carbon dioxide $(CO_2)$ and methane $(CH_4)$ are $31.1 \, ^\circ C$ and $-81.9 \, ^\circ C$ respectively. Which of the following statements is correct regarding their liquefaction?

Which of the following gases has the highest critical temperature?

What is the temperature below which a gas cannot exist as a gas (i.e.,it liquefies) called?