How do I determine if something is dipole-dipole or not through the lewis struct

Question

How do I determine if something is dipole-dipole or not through the lewis structure?

Choose the selection which correctly identifies the forces which must be overcome to convert PFs from a liquid to a gas. a) Only London dispersion forces must be overcome. b) Only dipole-dipole forces must be overcome c) Only London dispersion and dipole-dipole forces must be overcome. d) Only London dispersion and hydrogen-bonding forces must be overcome. e) London dispersion, dipole-dipole, and hydrogen-bonding forces must be overcome

Explanation / Answer

option a) is correct

PF5 molecules remains covalent in nature. and its dipole moment is 0 D. always its in gaseous state. and its boiling point is -84.60C.

only london dipole forces must be overcome to covert liquid to gaseous state.

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