Using the provided information in the following paper chromatogram:\ The calculated $R_{f}$ value o

Question

Using the provided information in the following paper chromatogram:\ The calculated $R_{f}$ value of $A$ is $\qquad$ $	imes 10^{-1}$.\

Professor PC Thomas Classes · Answer

(4) : $R_{f}=\frac{	ext { Distance travelled by compound }}{	ext { Distance travelled by solvent }}$ From chromatogram, distance travelled by compound $A=2 \mathrm{~cm}$ and distance travelled by solvent $=5 \mathrm{~cm}$\ $	herefore \quad R_{f}=\frac{2}{5}=4 	imes 10^{-1}$\