Nivedita Bose and Madhur Gupta Solutions for Chapter: Fibre to Fabric - Animal Fibres, Exercise 2: Worksheet FA

Read the passage and answer the following questions.
Acrylic is the synthetic or man-made alternative to wool. It is made from the combination of coal, air, water, oil and limestone. It was first made in Germany by DuPont in $1944$ and began commercial production in $1950. 75\%$ of acrylic fibres are used in apparel, $20\%$ in home furnishing and $5\%$ in industrial end-uses. Acrylic fibres are used in waistcoats, cardigans, jackets, socks, knee-high stockings, training and jogging suits. It is used either in pure form or blended with cotton or wool. It resembles wool in many properties such as fluffiness, warmth and softness. However, it does not absorb water. It brings the moisture to the surface of the fabric where it evaporates. It has very good shape retention, durability and quick dry qualities. It is especially suited for sportswear due to its low water absorption, quicker water transport and light and weather resistance.

Where is the maximum use of acrylic?

Is all the fleece obtained from sheep is pure wool?

Does silk need to be detangled like wool?

After shearing, sheep are given an antiseptic bath. What could be the reason behind it?

Why are the silk pupa killed? What would happen to silk thread, if they were allowed to come out as moths?

Should the caterpillars be touched with bare hand? Why?

Why do you think silk is very expensive?

Since silk clothes are expensive, do you think silk farmers are rich? Justify your answer.