Answer :

1. In paper chromatography, chromatography paper is used. This paper contains water trapped in it, which acts as the stationary phase.

2. On the base of this chromatography paper, the solution of the mixture is spotted.

3. The paper strip is then suspended in a suitable solvent, which acts as the mobile phase. This solvent rises up the chromatography paper by capillary action and in the procedure, it flows over the spot.

4. The components are selectively retained on the paper (according to their differing position in these two phases). The spots of different components travel with the mobile phase to different heights.

5. The paper so obtained is known as a chromatogram.

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