Which one is an acidic dye?

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Question

(D) The correct answer is $(D)$. Acid dyes are characterized by the presence of acidic functional groups such as $-COOH$,$-SO_3H$,or phenolic groups.

Vedclass · Accepted Answer

All of these

Vedclass · Answer

(D) The correct answer is $(D)$. Acid dyes are characterized by the presence of acidic functional groups such as $-COOH$,$-SO_3H$,or phenolic groups. These dyes are typically applied in an acidic medium and show affinity for protein fibers like wool,silk,and nylon. Methyl orange,Methyl red,and Phenolphthalein all possess acidic functional groups that allow them to act as acid-base indicators and function as acidic dyes in specific applications.

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