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Question

Indigo dye is an example of :

A
Azo dye
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B
Vat dye
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C
Dispersed dye
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D
Basic dye
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Solution

The correct option is B Vat dye
Indigo dye is an example of Vat dye, These dyes can be used only on cotton it is a long continuous process which is carried out in a large vessel known as Vat. These dyes are applied directly on the fibre and are generally insoluble in water.

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