Q. In which of the following molecules the van der Waals’ forces is likely to be the most important in determining the melting and boiling point?
A) CO
B) $H_{2}S$
C) $Br_{2}$
D) $HCl$
Explanation
(c)
$Br_{2}$is a non-polar molecule and hence, its melting point and boiling point depend only upon van der Waals’ forces of attraction while all the remaining molecules have dipole moments and hence, their melting points and boiling points depend upon dipole-dipole interactions
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.