A) \[N{{H}_{3}}\]
B) \[{{H}_{2}}\]
C) \[{{N}_{2}}\]
D) \[{{O}_{2}}\]
Correct Answer: A
Solution :
The gases, which are easily liquifiable such as \[N{{H}_{3}},\,C{{O}_{2}},HCl\] etc. are adsorbed to greater extent than permanent gases like \[{{O}_{2}},{{H}_{2}},\]\[{{N}_{2}},He\] etc.
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