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Chemistry Question on Chromatography and Its Principles

On a thin layer chromatographic plate, an organic compound moved by 3.5 cm, while the solvent moved by 5 cm. The retardation factor of the organic compound is \\_\\_\\_\\_ \times 10^{-1}.

Answer

The retardation factor (Rf) is given by:
Rf=Distance travelled by sample/organic compoundDistance travelled by solventRf =\frac{Distance\ travelled\ by\ sample/organic\ compound}{Distance\ travelled \ by \ solvent}
Rf=3.55=7×10−1Rf=\frac{3.5}{5}=7 \times 10^{-1}