Question

In chromotography ,the ingredients of a mixture rise up to a limited height when water rises up to the upper end of the paper

Answer 1

**with the separation of the ingredients the mixture rises up to certain level.

**In paper chromatography, substances are distributed between a stationary phase and a mobile phase. The stationary phase is the water trapped between the cellulose fibers of the paper. The mobile phase is a developing solution that travels up the stationary phase, carrying the samples with it.

**You are making the assumption that if you have two spots in the final chromatogram which are the same color and have travelled the same distance up the paper, they are most likely the same compound.

**It is often used when the dissolved substances are coloured, such as inks, food colourings and plant dyes. It works because some of the coloured substances dissolve in the solvent used better than others, so they travel further up the paper. A pencil line is drawn, and spots of ink or plant dye are placed on it.