Question

Reactive dyes utilize a _________ attached to a substituent that is capable of directly reacting with the fibre substrate.

• A. chromophore
• B. auxochrome
• C. chlorophyll
• D. none of the above

Answer 1

The correct option is A chromophore

Reactive dyes utilize a chromophore attached to a substituent that is capable of directly reacting with the fiber substrate. The covalent bonds that attach the reactive dye to natural fibers make them among the most permanent of dyes. 'Cold' reactive dyes, such as Procion MX, Cibacron F, and Drimarene K, are very easy to use because the dye can be applied at room temperature. Reactive dyes are by far the best choice for dyeing cotton and other cellulose fibers at home or in the art studio.

Hence option $A$ is correct.