Question

Which of the following dyes is used for colouring Paper and typewriters?

A Nitro Dyes Correct Answer Incorrect Answer
B Triphenyl methane Dyes Correct Answer Incorrect Answer
C Azo Dyes Correct Answer Incorrect Answer
D Mordant Dyes Correct Answer Incorrect Answer

Solution

Triphenyl Dyes contains the paraquinoid moiety as a chromophore and -OH, -NH₂ as auxochrome. These dyes are not fast to light and washing and hence used for colouring Papers or typewriters.

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