Question

The separation of two coloured substances was done by paper chromatography. The distances travelled by solvent front, substance A and substance B from the baseline are 3.25 cm, 2.08 cm and 1.05 cm respectively. The ratio of R_f values of A to B is ______.

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Answer 1

The separation of two coloured substances was done by paper chromatography. The distances travelled by solvent front, substance A and substance B from the baseline are 3.25 cm, 2.08 cm and 1.05 cm respectively. The ratio of R_f values of A to B is 2.

Explanation:

R_f = `"distance travelled by the component"/"distance travelled by the Solvent"`

`(R_(F_A))/(R_(F_B)) = (2.08/3.25)/(1.05/3.25) = 2.08/1.05` = 2