A) \[{{\operatorname{NH}}_{3}}\]
B) \[\operatorname{HCl}\]
C) \[\operatorname{He}\]
D) \[{{\operatorname{H}}_{2}}O\]
Correct Answer: C
Solution :
He Intermolecular forces: Forces of attraction existing among molecules of a substance polar molecules such as HC1 have greater intermolecular forces of attraction than non-polar molecules He: Further \[{{\operatorname{H}}_{2}}O\]can form hydrogen bond have higher B.P than their counterparts such as \[{{\operatorname{NH}}_{3}}\]which do not form hydrogen bond.
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