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Published on: 29/10/2025
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Questions + Answers key
Take MCQ Science Test
1.
Bakelite is.......... plastic
2.
The first fully synthetic fibre was..........
3.
The synthetic fibres are also known as ................fibres.
4.
A polymer is a chain of many small units joined together which are called......
5.
Like synthetic fibres, plastic is also a..........
6.
Synthetic fibres are synthesised from raw materials called.........
7.
Why should we not wear synthetic clothes while working in kitchen?
8.
When we add hot water in a plastic bottle, it gets deformed. What kind of plastic is it? Give two more examples.
9.
What are petrochemicals?
10.
Name five articles made from nylon.
11.
Why, rayon is different from synthetic fibres?
12.
Write any three positive characteristics of plastic.
13.
What are the properties of nylon?
14.
The strongest fibre is called:
rayon
nylon
acrylic
none of these
15.
PET is a
polyester
nylon
polyamide
thermosetting polymer
16.
The material which is commonly used for making kitchen containers is
PVC
acrylic
teflon
PET
17.
Which of the following is non-biodegradable?
Paper
Cotton cloth
Plastic
Wood
18.
Which of the following is not a common property of plastics?
Non-reactive
Light in weight
Durable
Good conductor of electricity
19.
The material similar to silk in appearance is
nylon
rayon
polyester
terylene
20.
Which is a thermosetting plastic?
Melamine
Polythene
PVC
Nylon
21.
Polycot is obtained by mixing
nylon and wool
polyester and wool
nylon and cotton
polyester and cotton
22.
Most of the plastics are biodegradable
23.
Synthetic fibre do not melt on heating
24.
Electric switches, plugs, sockets and handles of cooking utensils are made up of thermoplastics.
25.
We get natural fibres from plants and animals
26.
It is not advised to store food items in plastic containers as it reacts with the material of the container
27.
Acrylic is an artificial wool.
1.
( )
thermosetting
2.
( )
nylon
3.
( )
man-made
4.
( )
monomers
5.
( )
polymer
6.
( )
petrochemicals
7.
Synthetic fibres melt very soon and easily catch fire. If the clothes catch fire, it can be disastrous.
The fabrics melt and stick to the body of the person wearing them. So, we should avoid wearing them, while working in kitchen.
8.
It is thermoplastic. Two examples are polythene, PVC.
9.
All synthetic fibres are prepared by a number of processes using raw materials of petroleum origin, called petrochemicals.
10.
Articles made from nylon are socks, ropes, tents, toothbrushes, car seat belts, sleeping bags etc.
11.
Rayon is different from synthetic fibres because it is obtained from natural source
12.
Plastic is very strong, light and durable. It can be moulded into different shapes and sizes. It is used for various purposes. Plastics are generally cheaper than metals. They are widely used in industry and for household articles.
13.
Properties of nylon are:
(i) Nylon is a synthetic fibrous material that is known for its high tensile strength, abrasion resistance and chemical stability.
(ii) It is a very resilient fibre that is often used to make cords and ropes that need to support a lot of weight and withstand in wet, hot or dirty condition.
(iii) When used in clothing, nylon is both light weight and warm.
14.
(b)
nylon
15.
(a)
polyester
16.
(d)
PET
17.
(c)
Plastic
18.
(d)
Good conductor of electricity
19.
(b)
rayon
20.
(a)
Melamine
21.
(d)
polyester and cotton
22.
(b)
23.
(b)
24.
(b)
25.
(a)
26.
(b)
27.
(a)
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