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om thenecals Polyester is also a completely synthetic fibre, manufactured from chemials obtained from coal and petroleum (petrochemicals). Polyester (poly+ester) means polymer of ester. Polyester is made up of repeated units of a chemical called on ester. Esters have a property to repel water. • Polyester is blended with other fibres to make blended fibres which are better and easier to maintain as compared to natural fibres. Polyester fabrics are commercially sold as polycots, poly wools, terylene, terrycot and terywool. Polyester is blended with cotton to make polycot. • Polyester is blended with wool to make polywool. • Terylene is a popular polyester that can be drawn into fine fibres and woven like any other yarn. It is commonly blended with cotton to make terycot and it is blended with wool to make terywool. Danubiae falsetelei: 11

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Q1
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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Q2
Polyester can be blended with natural fibres to obtain different fabrics.​
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Q3

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

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


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Q4
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.
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Q5
Polyesters can be blended with cotton to form and with wool to form .
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