Question

A method of separation involving colour bandsA method of separation involving colour bands

Answer 1

Answer:

chromatography is the method involving colour band

Answer 2

Answer:

Blue or black dye can be separated from ink by the process of evaporation. Ink is a colloidal solution and a heterogeneous mixture of dye and water. Heating leads to evaporation of water. This leaves behind dye in watch-glass.