Cases are compressible because the intermolecular space is very large in gases, whereas liquids are not compressible because in liquids, the intermolecular space is less.

Cases are compressible because the intermolecular space is very large in gases, whereas liquids are not compressible because in liquids, the intermolecular space is less.
Substance | Melting point(°C) | Boiling point(°C) |
X | -219 | -183 |
Y | 119 | 445 |
Z | -15 | 78 |