Question

Give examples of:
1. Two natural fibers obtained from animals:
2. Two natural fibers obtained from plants:
3. Two synthetic fibers:
4. A natural polymer:
5. Country where silk fiber was discovered:
6. Artificial silk:
7.
The first fully synthetic fiber:​

Answer 1

✬ ANSWER ✬

1.) Wool , Silk

2.) Jute , Cotton

3.) Nylon , Polyster

4.) Silk , Wool (anyone)

5.) China

6.) Rayon

7.) Nylon

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• Wool is commonly obtained from the hair of Sheep , Yak , Rabbits etc.

• Wool fibre is highly porous.

• Silk is soft , light in weight and strong. It is obtained from cocoons of silkworm.

• Silk was developed in China about 5000 years ago.

• The technique of silk making came in Indian about 1700 years ago.

Answer 2

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Give examples of:

1. Two natural fibers obtained from animals:

• Silk and wool.

2. Two natural fibers obtained from plants:

• Cotton and Jute

3. Two synthetic fibers:

• Nylon and Rayon

4. A natural polymer:

• Cellulose and Silk

5. Country where silk fiber was discovered:

• China

6. Artificial silk:

• Rayon

7. The first fully synthetic fiber:

• Nylon

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Additional Information -

• All fibres which are made from plants and animals are known as natural fibres.

• The fibres which are made by using chemical in laboratories/factories are called synthetic fibres.

• A long chain of molecule consisting of simple small molecules(monomers) joined to each other by chemical bonds is called polymer.

• Natural polymers are those polymers which occur in nature. Ex- cellulose, silk, wool, protiens etc.

• Synthetic polymers are those polymers which are made in laboratories from small molecules.Ex -nylon, polythene,teflon etc.

• Silk fibre was firstly discovered in China.

• Nylon was the first commercially successful synthetic fibre and polymer prepared for first time in 1931.

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