Question

name the separation technique by which we can obtain coloured component from ink give two more application of the technique used

Answer 1

Chromatography is the technique which is used to separate coloured component of the ink.
Chromatography is a technique used to separate mixtures into its components.It is used -

to check the purity of an organic compound,

to detect pesticide or insecticide residues in food,

in forensics to analyze the dye composition of fibers,