How can we obtain coloured component from blue/black ink?

Distillation

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Filtration

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Evaporation

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None of these

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Solution

The correct option is B Evaporation
Ink is a mixture of dye and water. Thus we can separate the volatile component(solvent) from its non-volatile solute by evaporation.
When the ink is heated on the watch glass for the separation of colored components from it, water gets evaporated from it leaving behind coloured components.

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