Fill in the blanks.

(i) A polymer is a chain of many small units joined together which are called .

(ii) The synthetic fibres are also known as fibres.

(iii) The first fully synthetic fibre was .

(iv) A fibre similar to wool is .

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Solution

(i) monomers - It is a organic molecule which reacts with other organic molecule to form a large molecule. For example - ethylene molecules makes up polyethylene
(ii) man-made - Synthetic fibres are made by chemical agents in laboratory.
(iii) nylon - It is a synthetic polymer which is composed of polyamides.
(iv) acrylic - It is a substitute for wool and is cheaper than natural wool

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Fill in the blanks.

(i) A polymer is a chain of many small units joined together which are called

(ii) The synthetic fibres are also known as fibres.

(iii) The first fully synthetic fibre was .

(iv) A fibre similar to wool is .

(v) A plastic used for making crockery is .

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(a) Synthetic fibres are also called _______ __or _______ __fibres.

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Fill in the blanks. (i) A polymer is a chain of many small units joined together which are called ____. (ii) The synthetic fibres are also known as ____ fibres. (iii) The first fully synthetic fibre was ____. (iv) A fibre similar to wool is ____.

Fill in the blanks.

(i) A polymer is a chain of many small units joined together which are called .

(ii) The synthetic fibres are also known as fibres.

(iii) The first fully synthetic fibre was .

(iv) A fibre similar to wool is .