The formula of determining the [tex] R_f [/tex] value is:
[tex] R_f = \frac{distance travelled by the solute}{distance travelled by the solvent} [/tex]
where both the distance are measured from the common origin.
10 % ethyl acetate/ hexane means it has 10 % ethyl acetate and 90 % hexane which are non-polar in nature. Hence, the non-polar compound will travel farther in the TLC plate along with the eluent and the polar compound will travel less as they remain attracted to the polar adsorbent [tex] SiO_2 [/tex].
Among 3-decanone and 3-decanol, 3-decanone will have high [tex] R_f [/tex] as it is non-polar.
Among toluene and benzoic acid, toluene will have high [tex] R_f [/tex] as it is non-polar.
Among cyclooctane and cyclooctanone, cyclooctane will have high [tex] R_f [/tex] as it is non-polar.
