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AP EAMCET2004Chemistryp Block Elements (Group 15, 16, 17 & 18)

In the Dewar's method of separation of noble gases, the mixture of noble gases is kept in contact with coconut charcoal at 173 ~K which one of the following gaseous mixtures is not adsorbed on to the charcoal?

Options

  1. AAr , Kr
  2. BXe , Ar
  3. CHe , Ne
  4. DXe , Kr

Correct answer

C. He , Ne

Step-by-step solution

Only He and Ne are remained unadsorbed on the coconut charcoal at -100^ C (173 ~K ) as their boiling points are less than -100^ C .( He =4 ~K , Ne =27 ~K )

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