3. (a) What are raw silk and spun silk?
(b) On burning silk, it gives out the smell of burning hair. Give reason.
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3. (a) What are raw silk and spun silk?
(b) On burning silk, it gives out the smell of burning hair. Give reason.
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Explanation:
Answer:
a. Silk containing sericin is called raw silk. The gummy substance, affording protection during processing, is usually retained until the yarn or fabric stage and is removed by boiling the silk in soap and water, leaving it soft and lustrous, with weight reduced by as much as 30 percent. Spun silk…
b.Silk is formed of animal protein secretion of silkworms. Hence , when burnt it smells like hair , which is also composed of animal protein. Cotton is mostly cellulosre and when burnt smell like paper which is also made of plant cellulose.
Explanation:
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