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Synthetic Fibres and Plastics (Danish)

Total questions: 54

Worksheet time: 46mins

Name
Class
Date
1.

Clothes can be made from natural fibers such as .....

a)

Cotton

b)

Silk

c)

Wool

d)

Rayon

2.

Are all clothes made of natural fibres?

a)

Yes

b)

No

3.

Synthetic Fibres are Obtained from Plant and Animal source.

a)

Yes

b)

No

4.

Synthetic fibres are made by the raw materials obtained form (a)  

5.

Synthetic fibres are used not only for fabrics but also in preparing many house hold (a)  

6.

Each smal unit in the chain is known as (a)   units.

7.

Many small, identical units (monomers) combine to form a large unit called (a)  

8.

Unlike natural fibres, synthetic fibres are made from petroleum based chemicals or (a)  

9.

Petrochemicals are subjected to various chemical processes to obtain __________

a)

Natural fibres

b)

Synthetic fibres

c)

Rayon

d)

Polyester

10.

Synthetic fibres are also called (a)  

11.

'Poly' means _______ and 'mer' means _________

(a)  

12.

Word (Polymer) is derived from (a)  

13.

Which fibre source is not exhaustible?

a)

Natural

b)

Synthetic

c)

Both

14.

How do you find whether a fabric is synthetic or not?

a)

pull out a thread

b)

unravel this thread

c)

visual inspection

d)

fibre burning test

15.

If it smells like burning hair, the yarn is _______ or ______silk

(a)  

16.

If it smells like burning paper, the yarn may be ______ or ______

a)

cotton

b)

rayon

c)

wool

d)

acrylic

17.

If the yarn melts in the flame, it is a synthetic fibre such as ______ and ________

a)

Nylon

b)

Acrylic

c)

silk

d)

rayon

18.

Nylon is prepared from _________

a)

coal

b)

water

c)

air

d)

wood

19.

It was the first fully processed synthetic fibre?

(a)  

20.

It became popular during the Second World War ?

(a)  

21.

Nylon is a polymer made of chemical units called (a)  

22.

Polyamides of Nylon are made with

a)

Monomers

b)

Hexamethylene diamine

c)

adipic acid

d)

wood pulp

23.

Solid chips of these polyamides (Nylon) are melted and forced through a heated ________ which has very very tiny _______

a)

Spinneret

b)

Holes

c)

Shapes

d)

Circles

24.

Nylon fibre is ________

a)

Strong

b)

Elastic

c)

Light in weight

d)

Colorful

25.

Clothes made of Nylon are _______ and _________

a)

Lustrous

b)

Easy to wash

c)

colorful

d)

Absorb Water

26.

Nylon does not absorb water.

a)

Yes

b)

No

27.

Static electricity is not easily created in Nylon fabrics.

a)

Yes

b)

No

28.

Nylon does not easily catches fire

a)

Yes

b)

No

29.

We can't wear Nylon clothes during cooking.

a)

Yes

b)

No

30.

Rock climbers use Nylon (a)   to climb Mountains

31.

Can we use cotton cloth and cotton ropes in preparing a parachute ?

a)

Yes

b)

No

32.

Traditionally fishermen used cotton nets. Now they are using nylon nets. Why ?

a)

Strong

b)

Elastic

c)

Light in weight

d)

Does not absorb water

33.

Natural silk is obtained from (a)  

34.

Fabrics made of silk are very ______

a)

Cheap

b)

Costly

c)

Accessible

d)

Easy maintenance

35.

Natural silk is accessible to all

a)

Yes

b)

No

36.

Production and maintenance of silk clothes is

a)

Very difficult

b)

Time taking process

c)

Very Easy

d)

Takes very less time

37.

For many years scientists attempted to make silk artificially and their efforts were successful towards the end of the (a)   century.

38.

The first commercial production of artificial silk was achieved in (a)   in 1911.

39.

Artificial silk was named as Rayon in (a)  

40.

The first (a)   factory in India was established in Kerala in 1946

41.

The source material for rayon is (a)  

42.

(a)   is the only synthetic fibre obtained from plant cellulose

43.

Rayon is obtained from plant cellulose and so it is called (a)  

44.

chemicals used for preparing Rayon are

a)

Sodium hydroxide

b)

Carbon Disulphide

c)

adipic acid

d)

Diamine

45.

Cellulose dissolves in chemicals, added to it and gives a syrup called (a)  

46.

Viscose (Rayon) is forced through a spinneret into a solution of (a)  

47.

Some kinds of rayons are made form the short cotton fibres left on (a)   seeds after ginning

48.

Rayon is ______ than silk

a)

cheaper

b)

time taking process

c)

not accessible

d)

difficult in maintenance

49.

Rayon is mixed with cotton to make (a)  

50.

Rayon is mixed with wool in making of (a)  

51.

Rayon is not a perfect fibre to prepare all fabrics because it is made up from plant cellulose, it (a)   easily.

52.

Absorbing water makes Rayon weak and causes the fibre to (a)   easily.

53.

What characteristics make rayon better than natural silk?

a)

Cheaper

b)

Woven like silk fibre

c)

Can be dyed in wide variety of colours

d)

Absorbs water

54.

If sanitary diapers and bandages are made of nylon, what will happen?

a)

It will not absorb liquid excretioins

b)

Harmful for eyes

c)

Absorbs water

d)

None of the above