All the noble gases are colourless and tasteless monoatomic gases. In general, noble gases are least reactive and their inertness to chemical reactivity is attributed to the following reasons. Reactive and their inertness to chemical reactivity is attributed to the following reasons. (i)Except helium, all have completely filled `ns^(2)np^(6)` electronic configuration in their valence shells. (ii)All have high ionisation enthalpy and more positive electron gain enthalpy. However, a number of xenon compounds mainly with most electronegative elements like fluorine and oxygen have been synthesized under different conditions and fluorides of xenon have been used as an oxidising agent and a fluorinating agent in many of the chemical reactions Noble gases have very low melting and boiling points because.A. they have high ionisation enthalpyB. they have more positive electron gain enthalpyC. the type of interatomic interaction is weak metallic bonds.D. the type of interaction is weak dispersion forces.