Answer: The phase transition can take place from gaseous to liquid or from gaseous to solid.
Explanation: From the given data in the question, we are increasing the pressure on the gaseous sample at constant temperature.
As we increase the pressure, the particles of the sample come closer to each other which means that it can convert into either solids or liquids.
Hence, two phase transitions are possible for this condition:
1) From gaseous phase to liquid phase
2) From gaseous phase to Solid phase.
