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Evolution of Clothing

Polyester can...

Question

Polyester can be blended with natural fibres to obtain different fabrics.

A

False

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B

True

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Solution

The correct option is B True

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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.

Rayon is different from truly synthetic fibres because :

(a) it has a silk-like appearance.

(b) it is obtained from wood pulp.

(c) its fibres can be woven like those of natural fibres.

(d) it can be dyed in wide variety of colours.

Q. Fill in the blanks with the correct words.
1. Fibres that are made by human beings are called .................... (natural/synthetic) fibres.
2. .................... (Polyester/Rayon) absorbs sweat.
3. .................... (Nylon/Rayon) are used for making toothbrush bristles.
4. .................... (Spandex/Nylon) has excellent elasticity.
5. Most synthetic fibres .................... (can/cannot) handle heavy loads without breaking.

Statement 1: Polyester can be blended with cotton to obtain polycot.

Statement 2: Cotton wrinkles but the blended fabric polycot, does not wrinkle.

Q. Polycot, a blended fibre is made from
(a) polyester and nylon.
(b) polyester and wool.
(c) polyester and acrylic.
(d) polyester and cotton.

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