First slide

Group-18 or Inert or Noble gases

Question

$Xe > Kr > Ar > Ne >$ He. This order represents

Easy

A

ease of vapourisation
B

enthalpy of vapourisation
C

ionisation enthalpy
D

solubility in water

Solution

I.E. decreases down the group due to increase in size and screening effect of the inner electrons
$I.E.: He > Ne > Ar > Kr > Xe > Rn$

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