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Q.

Which statement about noble gases is not correct?

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a

‘Xe’ forms XeF6 under suitable conditions

b

'He’ has the highest boiling point among all the noble gases.

c

‘Ar’ is used in electric bulbs

d

The number of lone pair of electrons present on Xe in XeF2 is 3

answer is D.

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Detailed Solution

  • The strength of the Van der Waals forces, which rely on the separation between  atoms or molecules. 
  • These interactions occur when uncharged atoms and molecules  come into contact.  
  • Van der Waals force is directly proportional to boiling  point.  He electronic configuration is  1s2. It consists of only one orbit which is close to the nucleus. Among the noble gases, Helium has weak Vander waal’s force and hence it has low boiling point  
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Which statement about noble gases is not correct?