In which of the following molecules the van der Waals forces are likely to be the most important in determining the mpt. and b.pt.?

Options

A. CO
B. `H_(2)S`
C. `Br_(2)`
D. `HCl`

Answer

C

Explanation

`Br_(2)` is a non-polar moelcule and hence, its melting point and biling point depend only upon van der Walls's forceof attraction , while all the remaining molecules have dipole moments and hence, their melting points and boiling points depend upon dipole-dipole interactions.