The correct order of solubility in water for He, Ne, Ar, Kr, Xe is

(c) Solubility increases from He to Rn

The correct option is (b) Xe > Kr > Ar > Ne > He.

Explanation:

As the size of the noble gas atoms increases down the group, the polarisation of the electron cloud becomes easier. So, heavier noble gas atoms are easily polarised in polar water. Thus, solubility increases down the group.

Correct option: (b) Xe > Kr > Ar > Ne > He

Explanation:

As the molecular weight of noble gas atoms increases down the group its polarity increases due to which van-der-waal’s force between them increases. Due to increased polarity of heavier inert gas, its solubility in water also increases. So, most soluble gas will be Xe and least soluble will be He. So correct order is Xe > Kr > Ar > Ne > He