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Question

An example of vat dye is:

A
indigo
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B
alizarin
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C
malachite green
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D
martius yellow
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Solution

The correct options are
A indigo
B alizarin
Vat dyes are most important dyes for dyeing and printing on cotton and cellulosic fibres. Indigo is an example of a vat dye. Anthraquinone derivatives such as alizarin are also vat dye.
Option (A) and (B) are correct.

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