What is difference, if any, between the staining characteristic of cotton and po

Question

What is difference, if any, between the staining characteristic of cotton and polyester? a) both stained equally well. b) the cotton stained a much darker. c) the polyester stained a much darker. Specific non - covalent force are represent between the molecules of Indigo Blue and the molecules of the fabric in one type of fabric are nearly absent in the other one. These forces make easier are for one type one type of fabric to pick up more molecules of Indigo Blue and to appear darker when dyed. (See the structures for cotton and polyester below.) These non - covalent interactions in the darker fabric most dyed fabric are most likely to be: a) Hydrogen bonds b) van der Waals forces c) ion ion interactions d) C - O bonds e) C - O bonds Indigo staining of cotton is often described as being a very deep blue or intensely blue depending upon the fabric. Describe your dyed fabric as a "deep blue" or as a "light blue." A well known and respected Archaeologist claims to have uncovered hieroglyphs in the tomb of King Tut that revealed an intense debate among the Egyptian scholars of the period as to whether the Enol isomer of Indoxyl is really converted into the Keto isomer. Do you believe this Archaeologist is telling the truth? Give a possible reason for your answer. a) Yes, the ancient Egyptians were first class scientists for their times. present. b) Yes, enol isomers were much more stable in the past than they are at present. c) No, enol isomers did not exist during the times of the ancient had the ancient Egyptians. d) No, the lifetime for an enol isomer would be so short that the Egyptians would not have had the tools to discover them. Write the structure of the dye that would be formed if acetone reacted with 4 - methyl - 2 - following reaction route that parallels that for the formation of Indigo.

Explanation / Answer

Ans 6. b . Cotton satined a much darker.

Cotton is a natural fibre derives from cellulose , whereas polyester is a synthetic fabric.

The fibre reactive dyes form permanent chemical covalent bonds with cotton hence stain darker , however they do not react with the synthetic fibre polyester , and hence stain them lighter.

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