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      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, -NHâ‚‚ as auxochrome. these dyes are not fast to light and washing and hence used for colouring Papers or typewriters.

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