In a paper chromatography experiment, a sample of a pigment is separated into two components, X and Y, as shown in the figure above. The surface of the paper is moderately polar. What can be concluded about X and Y based on the experimental results?

The solvent, hexane, is nonpolar. Molecules that are nonpolar will be attracted to hexane more so than the polar filter paper. Conversely, molecules that are polar will not move up the filter paper since they are more attracted to the filter paper than the moving solvent.