The dye in black ink can be separated by the method of:

by

The dye in black ink can be separated by the method of:

evaporation
fractional distillation
dialysis
chromatography
This question was previously asked in
UPSC Geoscientist – 2020
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The dye in black ink can be separated by the method of chromatography.
Black ink is typically a mixture of several different coloured dyes. Chromatography is a technique used to separate components of a mixture based on their differential partitioning between a stationary phase and a mobile phase. Different dyes in the ink travel at different rates through the stationary phase (like paper), causing them to separate.
Evaporation is used to separate a soluble solid from a liquid. Fractional distillation separates liquids with different boiling points. Dialysis separates particles based on size using a semipermeable membrane. Chromatography is the standard method for separating different coloured dyes in ink.

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