2-dimensional paper chromatography is a technique in which a chromatogram is first developed using a particular solvent (either by ascending or descending paper chromatography), and then the paper is rotated 90 degrees for a second run with a different solvent.
2-dimensional paper chromatography allows components that are not separated by the first solvent (due to their insolubility in that solvent) to be separated by the second solvent, thereby producing a chromatogram with better resolution than a 1-dimensional paper chromatogram.
Question
With reference to the above diagram, what is the minimum number of chemical components in mixture X?
Answer
5