BCECE Engineering BCECE Engineering Solved Paper-2003

  • question_answer
    Which of the following is an engrain dye?

    A) Congo-red         

    B) Aniline black      

    C)        Alizarin                

    D)        Indigo

    Correct Answer: B

    Solution :

    (i) Congo red is direct dye. (ii) Alizarin is anthraquinone dye. (iii) Aniline black is an uigrain dye. The last process of dyeing is done on fabric for such dyes-            


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