1. For which pair of molecules does dipole-dipole interaction occur?
QUESTION:
For which pair of molecules does dipole-dipole interaction occur?
A. H2O and CO B. H2O and HF
C. CO2 and CO D. CH4 and CO2
Dipole-dipole interaction occurs only between two molecules that are polar.
For which pair of molecules does dipole-dipole interaction occur?
A. A water molecule and a carbon dioxide molecule....
B. A water molecule and a hydrogen fluoride molecule...
C. Two carbon dioxide molecules...
D. A methane molecule and a carbon dioxide molecule...
PAUSE CLICK Dipole-dipole interaction occurs only between two molecules that are polar.
So, we just need to identify the pair where both molecules are polar
By now, you should be able to figure out if a molecule is polar or not.
The polar molecules here are H2O and HF only.
HIGHLIGHT H2O and HF
Therefore, dipole-dipole interaction only occurs between this pair.
The corerct answer is choice B.
CLICK PAUSE END RECORDING

2. Video ID: © 2008, Project VALUE (Video Assessment Library for Undergraduate Education), Department of Physical Sciences Nicholls State University Author: Glenn V. Lo Narrator: Funded by Louisiana Board of Regents Contract No. LA-DL-SELECT-13-07/08