A) Xe
B) He
C) Ar
D) Kr
Correct Answer: B
Solution :
[b] He The natural gas is compressed to about 100 atm and cooled to 73k. Under these conditions, helium does not liquefy while all other gases get liquefied. About 99% pure He is prepare by this method. Ne, Ar, Kr, Xe are obtained by fractionation of liquid air. Radon is obtained as decay product of radiumYou need to login to perform this action.
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