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Write notes of science ch. 3 …

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Write notes of science ch. 3 synthetic fibres and plastics.
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Meghna Thapar 5 years, 10 months ago

A synthetic fibre is a polymer made up of a chain of small molecules joined together. These small molecules which join together to form a polymer are called monomers.  Polymers are of two types – natural polymer and synthetic polymer. Cotton is made up of a natural polymer called cellulose in which glucose molecules are joined together one after the other.

 

 

A plastic is synthetic material which can be moulded into desired shape when soft and then hardened to produce a durable article.

Plastics are polymers. A number of articles made up of plastics are used in our daily life like water pipes, pens, combs, toothbrushes, toys, shoes, etc.

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