Question 29
Complete the crossword given below with the help of clues.
Across
1.Substance used as synthetic wool (7)
2.A plastic used for making containers and carry bags (9)
3.Substance made up of large number of smaller molecules (7)
4.Another name for this compound is artificial silk (5)

Down
5.A type of fibre obtained naturally from cocoon (4)
6.A synthetic fibre classified as polyester (8)
7.A polymer used for making rope (5)

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Q. Complete the crossword given below with the help of clues
Across
1. Substance used as synthetic wool (7 letters)
2. A plastic used for making containers and carry bags (9 letters)
3. Substance made up of a large number of smaller molecules (7 letters)
4. Another name for this compound is artificial silk (5 letters)
Down
5. A type of fibre obtained naturally from the cocoon (4 letters)
6. A synthetic fibre classified as a polyester (8 letters)
7. A polymer used for making rope (5 letters)

Q. Are these statements true or false? Rewrite the false ones correctly.
(a) Polymers are small molecules made by stringing together several monomers.
(b) Blended fabrics contain only synthetic fibres.
(c) Dusters made of nylon or other synthetic materials are good for use in the kitchen.
(d) Polyester fibres are obtained from petroleum products.
(e) Terylene, a synthetic fibre, can be used instead of wool.
(f) Rayon, which is obtained from cellulose, is a natural fibre.

Q. The polymeric fibres used as a substitute for wool in making synthetic blankets, sweaters, etc is _______.

Q. __________ is a synthetic fibre used for making artificial woollen clothes.

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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