Answer:

The intermolecular force that is most responsible for allowing xenon gas to liquefy is the instantaneous dipole-induced dipole force, also known as London dispersion force.

London Dispersion Force:
London dispersion force is a type of intermolecular force that exists between all molecules, regardless of their polarity. It is caused by temporary fluctuations in the electron distribution within a molecule, creating an instantaneous dipole. This instantaneous dipole can induce a dipole in a neighboring molecule, resulting in an attractive force between the two.

Xenon Gas:
Xenon gas (Xe) is a noble gas that exists as individual atoms rather than molecules. Noble gases have complete electron shells, making them highly stable and unreactive. Since xenon is a noble gas, it has no permanent dipole moment and does not form regular molecular bonds.

Liquefaction of Xenon Gas:
Despite being a noble gas, xenon can be liquefied at low temperatures and high pressures. This is due to the presence of London dispersion forces acting between the individual xenon atoms.

Explanation:
Although noble gases are generally nonpolar, they still experience London dispersion forces. The electron cloud around each xenon atom is not perfectly symmetrical, resulting in temporary fluctuations in electron distribution. These fluctuations create temporary dipoles, which induce dipoles in neighboring xenon atoms.

As the temperature decreases and pressure increases, the kinetic energy of the xenon atoms decreases, allowing the London dispersion forces to become more significant. At low temperatures and high pressures, the attractive forces between the xenon atoms become strong enough to overcome their kinetic energy, causing the gas to condense into a liquid.

Conclusion:
In conclusion, the instantaneous dipole-induced dipole force, or London dispersion force, is the intermolecular force most responsible for allowing xenon gas to liquefy. Despite xenon being a noble gas with no permanent dipole moment, temporary fluctuations in electron distribution give rise to temporary dipoles, inducing dipoles in neighboring xenon atoms. These induced dipoles create attractive forces that become significant at low temperatures and high pressures, leading to the liquefaction of xenon gas.