Synthetic Fibres

Q.

What is a philosophers wool?

Q.

The first man-made fibre is:

1. Nylon

2. Rayon

3. Polyester

4. Silk

Q.

Give five examples of rayon fibers

Q.

Synthetic fibres are usually cheaper than natural fibres.

1. True

2. False

Q.

What are Synthetic Fibers?

Q.

Synthetic fibers do not melt on heating. (True or False).

1. True
2. False

Q.
Twisting of two sets of yarns to make a fabric is known as

1. Ginning
2. Spinning
3. Weaving
4. Twisting

Q. Burning wool smells like a burning .

1. paper
2. plastic
3. hair

Q. Synthetic fibres are more durable than natural fibres.

1. True
2. False

Q.

Which following fibre is an example of synthetic fibre?

1. Wool

2. Linen

3. Cotton

4. Acrylic

Q. Write down the uses of cotton and jute fibres.

Q. Polyester is a natural fibre.

1. False
2. True

Q. Linen fibre is obtained from flax plant.

1. False
2. True

Q. All of these are artificial fibres except:

1. Nylon
2. Terylene
3. Rayon
4. Silk

Q. Synthetic fibres are more durable than natural fibres.

1. False
2. True

Q. All of these are artificial fibres except:

1. Nylon
2. Terylene
3. Rayon
4. Silk

Q.

Question 10

What are the differences between natural and synthetic fibres?

Q.

If you are given two sample pieces of cloth made of synthetic silk and natural silk which look the same; which among the following tests would you employ to find which silk is natural and which one is synthetic?

1. Put the cloth in water

2. Feel the texture of cloth

3. Burn and smell the fumes

4. It is impossible to find out

Q. Synthetic fibres are more durable than natural fibres.

1. False
2. True

Q.

Why do woollen fibre and silk fibre smell the same when burnt?

Q.

Synthetic fibres are made from chemicals in industries.

1. True

2. False

Q. Nylon is a synthetic fibre.

1. False
2. True

Q. All of these are artificial fibres except:

1. Rayon
2. Nylon
3. Silk
4. Terylene

Q. Which amongst the following synthetic fibres is a good absorbent of water?

1. Polyester
2. Nylon
3. Rayon
4. Acrylic

Q. Assertion: It is advised not to wear synthetic clothes while working in a laboratory.
Reason: The synthetic fibre melts on heating.

1. Both assertion and reason are true and the reason is the correct explanation of assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of assertion.
3. The assertion is true but the reason is false.
4. The assertion is false but the reason is true.

Q. Which of the following is a semi-synthetic fibre?

1. Nylon
2. Polyester
3. Cellulose acetate
4. Acrylic

Q. Identify me from the given options.
"I am not a natural fibre."

1. Wool
2. Silk
3. Jute
4. Nylon

Q. Which of the following groups contain only synthetic fibres?

1. Nylon, polyester, Wool
2. Jute, acrylic, nylon
3. Polyester, nylon, acrylic
4. Acrylic, Silk, Wool

Q. Burning wool smells like a burning .

1. paper
2. plastic
3. hair

Q.

Write two differences between silk and artificial silk.