Question

the diagram above shows thin - layer chromatograms of the same mixture of two compounds. based on the chromatograms, which solvent would be most effective at separating the two compounds if the same stationary phase is used for column chromatography?
a solvent a
b solvent b
c solvent c
d solvent d

Explanation:

Step1: Recall chromatography principle

In chromatography, better separation is indicated by a larger distance between the spots of different compounds.

Step2: Analyze chromatograms

By observing the thin - layer chromatograms, Solvent D shows the largest vertical separation between the two spots of the two compounds.

Answer:

D. Solvent D