Question

Which of the following exhibits the weakest intermolecular forces?

• A. $He$
• B. $HCl$
• C. $NH_3$
• D. $H_2O$

Answer 1

Answer: (A)

$He$

Answer 2

$He$ is a noble gas. Weak van der waal's forces operate between the gaseous molecules of Helium. In $NH _{3}, H _{2} O$ and $HCl$, there is strong Hydrogen bonding between the molecules.