Question

Class : 8th
Chapter : Synthetic fibre and plastics.

Question 1.
Example the types of fibre.

Question 2.
Explain the kinds of Plastics.

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Answer 1

Answer:

Textile fibers are generally classified as natural textile fibers and man-made fibers. As man advanced in textile technology he has discovered a variety of man-made as well as natural fibers which have been a boon to designers looking for different characteristics in the textiles they use to design their creations with.

Answer 2

$\tt \bf \underline {Question \: 1 : }$

⇒ Example the types of fibre.

$\tt \bf \underline {Answer :}$

There are two types of fibre. And they are :

Synthetic fibre -

• Synthetic fibre is the type of fibre that is made by human beings.
• The other name for synthetic fibre is man-made fibre.
• Examples of Synthetic fibre are :: Rayon, Nylon, Polyester and Acrylic etc.

Natural fibre -

• Natural fibres is the type of fibre that is made by natural sources.
• It is obtained from animals and plants.
• Examples of Natural fibres are :: Silk, Cotton, Jute.

$\tt \bf \underline {Question \: 2 : }$

⇒ Explain the kinds of Plastics.

$\tt \bf \underline {Answer :}$

There are two types of Plastics. And they are :

Thermoplastic -

• Those types of plastics which can be bent or twisted easily after heating is known as Thermoplastic.
• Examples : Some examples of thermoplastic are Polythene and PVC.

Thermosetting plastic -

• Those types of plastics which cannot be bent or twisted easily after heating and cannot be molded after it is molded after the first time are known as Thermosetting plastic.
• Examples : Some examples of Thermosetting plastic are Melamine and Bakelite.