Periodic Classification and Periodic Properties - Result Question 12
####9. Which one has the highest boiling point?
(a) $He$
(b) $Ne$
(c) $Kr$
(d) $Xe$
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Answer:
Correct Answer: 9. (d)
Solution:
- As we move down the group of noble gases, molecular mass increases by which dipole produced for a moment and hence London forces increases from $He$ to $Xe$.
Therefore, more amount of energy is required to break these forces, thus boiling point also increases from $He$ and $Xe$.
