Question

Substance A is made up two components O and P. A small sample of substance A was dotted onto chromatography paper, and a chromatogram was developed using an appropriate solvent. The result is shown below. Component O is adsorbed :

• A. more strongly onto the stationary phase and has a smaller $R_f$ value than component P
• B. less strongly onto the stationary phase and has a larger $R_f$ value than component P
• C. more strongly onto the stationary phase and has a larger $R_f$ value than component P
• D. less strongly onto the stationary phase and has a smaller $R_f$ value than component P

Answer 1

Answer: (A)

more strongly onto the stationary phase and has a smaller $R_f$ value than component P

Component O is adsorbed more strongly onto the stationary phase and has a smaller Rf value than component P. This is because the distance traveled by the component O on chromatography paper is smaller than the distance traveled by the component P.