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JEE Main & Advanced Chemistry Chemistry in Everyday Life / दैनिक जीवन में रसायन Question Bank Dyes and Pigment

  • question_answer
    Which of the following is a vat dye and often used in dyeing jeans

    A)                 Indigo  

    B)                 Alizarin

    C)                 Picric acid            

    D)                 Crystal violet

    Correct Answer: A

    Solution :

                    Vat dyes are insoluble compounds which up on reduction give soluble (lencoform) product. The product may be either coloured or colourless and have affinity for specific fabrics e.g. Indigo.


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