Question

In which of the following choices are the noble gases arranged correctly in order of increasing boiling point?

• A. $Xe,Kr,Ar,Ne$
• B. $Ne,Ar,Kr,Xe$
• C. $Kr,Xe,Ne,Ar$
• D. $Ar,Ne,Kr,Xe$

Answer 1

The correct option is B $Ne,Ar,Kr,Xe$

The boiling point of noble gases increases with increase in atomic size. Only weak London dispersion forces and weak van der Waals forces exist between the atoms of noble gases. The magnitude of these forces increases with an increase in the size of the atom. Thus, as the forces increase, more heat energy will be required to overcome these forces. Higher the atomic size, higher will be the boiling point.