Explain the following: [2 MARKS]

a. Regenerated fibres

b. Reeling the silk

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Solution

Explanation: 1 Mark each

a) Regenerated fibres: These fibres are made from extremely small cotton fibres or any other fibre source such as wood pulp, milk protein, etc. Chemicals are used to dissolve these and the solution is then converted into solid fibres. Examples are rayon, casein fibre (from milk) and soya bean fibre.

b) While obtaining silk from cocoon, firstly cocoons are boiled and then silk fibres are separated out, using machines. Machine unwinds the silk thread from cocoons. This process by which silk fibre is obtained is called reeling of silk.

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Question 9

Reeling of silk is
(a) a process of making silk reels
(b) the spinning of silk fibres
(c) the weaving of silk cloth
(d) the process of taking silk threads from a cocoon

What are the types of natural fibres? Explain. Classify the following based on the different types of natural fibres: [3 MARKS]

S. No	Fibres
1	Cotton
2	Wool
3	Silk

Q. Read the following statement and mark the correct answer

I. Artificially prepared synthetic fibre which resembles silk is known as terylene.

II. Rayon is not considered a synthetic fibre as it is regenerated from cellulose.

III. Bottles and jars are made up of PET.

Q. Which of the following fibre is also known as regenerated fibre?

Match the words of Column I with those given in Column II:

	Column I		Column II
(i)	Scouring	(a)	Yields silk fibres
(ii)	Mulberry leaves	(b)	Wool yielding animal
(iii)	Yak	(c)	Food of silk worm
(iv)	Cocoon	(d)	Reeling
		(e)	Cleaning sheared skin

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Explain the following: [2 MARKS] a. Regenerated fibres b. Reeling the silk

Explain the following: [2 MARKS]

a. Regenerated fibres

b. Reeling the silk