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Q.

Which one of the following noble gases is least soluble in water ?

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a

Kr

b

Xe

c

Ne

d

He

answer is D.

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Detailed Solution

  • 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, least soluble will be He.
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