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Dye: Quiz


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Question 1: Their main use is to dye ________ but they can also be used to dye nylon, cellulose triacetate, and acrylic fibres.

Question 2: Many are azoic dyes, although anthraquinone and triphenylmethane compounds are used for colors such as green and ________.
Orange (colour)IndigoBlueViolet (color)

Question 3: The ________ bonds that attach reactive dye to natural fibers make them among the most permanent of dyes.
Metallic bondChemical bondCovalent bondAromaticity

Question 4: The dyes were obtained from ________, vegetable or mineral origin, with no or very little processing.

Question 5: Subsequent ________ reforms the original insoluble dye.

Question 6: Reactive dyes are by far the best choice for dyeing cotton and other ________ fibers at home or in the art studio.

Question 7: Basic dyes are water-soluble ________ dyes that are mainly applied to acrylic fibers, but find some use for wool and silk.
ElectrolyteLithium-ion batteryHalf cellIon

Question 8: By far the greatest source of dyes has been from the plant kingdom, notably roots, berries, ________, leaves and wood, but only a few have ever been used on a commercial scale.
BarkPlant stemTreeCoppicing

Question 9: Because food dyes are classed as ________, they are manufactured to a higher standard than some industrial dyes.
Food additiveMilkFood chemistryE number

Question 10: Mordant dyes require a mordant, which improves the fastness of the dye against water, ________ and perspiration.

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