(B) Direct dyes adhere to the fibre through hydrogen bonding.They belong to the class of azo dyes.They are used to dye the fabric directly by placing

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(B) Direct dyes adhere to the fibre through hydrogen bonding.They belong to the class of azo dyes.They are used to dye the fabric directly by placing it in a hot aqueous solution of the dye.For example: Martius yellow,Congo red,etc.

Class 12 Chemistry Chemistry in Everyday Life Dyes and Pigment

Medium

Which of the following is a direct dye?

A
Phenolphthalein
B
Congo red
C
Alizarin
D
Indigo

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Dyes and Pigment

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Which of the following is a direct dye?

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Molybdenum compounds are used in

Which one is a disperse dye?

Indigo is a .......

Diazo-coupling is useful to prepare some

What type of substance is produced when resorcinol and phthalic anhydride are reacted in the presence of concentrated $H_2SO_4$?

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