Which factor is most responsible for the increase in boiling points of noble gases from He to Xe?

Options

A. decrease in I.E.
B. monoatomic nature
C. decrease in polarisability
D. increase in polarisability

Answer

D

Explanation

As the size of the noble gas increases, the polarisability increases accordingly. With increase in polarisability, the magnitude of van der Waals' force of attracton increases and hence the boiong points increase from He to Xe.