3.What is the chromatography paper called when the coloured compounds have been separated?

The chromatography paper where the colored compounds have been separated is referred to as a "chromatogram."

A chromatogram is a visual record produced during the process of chromatography, which helps in analyzing the mixture's components. During chromatography, different compounds in a mixture migrate at different rates when a solvent moves through the stationary phase (the chromatography paper). As the components separate, they leave distinct spots or bands on the paper, each representing a different compound. The distance each compound travels can be used to identify substances based on their retention factor (Rf value), which is the ratio of the distance traveled by the compound to the distance traveled by the solvent front. Thus, a chromatogram serves as a valuable tool in chemistry, biology, and other fields for analyzing complex mixtures.