Synthetic Fibres and Plastics Test

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Synthetic Fibres and Plastics Test - 27

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Question 1
1 / -0

The substance which undergoes decomposition by the microbial action is called a:

A
Biodegradable substance

B
Non-biodegradable substance

C
Recyclable substance

D
None of the above

Solution

Biodegradable substances are those materials or products that are able to naturally break down or decompose without causing any harm to the environment. Biodegradable substances are generally things that are organic in nature. This means they are substances that are made from things that were living at some point. Examples of biodegradable substances include paper which is made from trees, meat products which come from animals and leather products.
Question 2
1 / -0

Which of the following statement about plastics is incorrect?

A
They are usually light

B
They are derived from petroleum

C
They are man-made ploymers

D
They are good conductor of electricity in molten state

Solution

A plastic is any material that can be shaped or molded into any form$$-$$ some are naturally occurring, but most are man-made. They are light in weight. Plastics are made from petroleum oil. Oil is a carbon-rich raw material, and plastics are large carbon-containing compounds. They're large polymers with various types of monomers in many different arrangements to make an almost infinite variety of plastics with different chemical properties.
Most plastic is chemically inert and will not react chemically with other substances. They insulate from the flow of electricity as the molecules in plastics don't have any electrons that are free to flow to different plastic molecules to act as good insulators.
Question 3
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_________ is stronger than steel wire.

A
Cotton fibre

B
Silk thread

C
Plastic thread

D
Nylon fibre

Solution

Nylon is strong, elastic, and lightweight synthetic fiber. It was the first fully synthetic fiber. It is used in many ways like making parachutes, ropes of climbing, socks, etc.
It is stronger than steel wire.
Option $$D$$ is correct.
Question 4
1 / -0

Which of the following is/are the reasons for using plastics?
1. They are light, strong, and durable.
2. They are cheap.
3. They can be moulded into different shapes.

A
1

B
2

C
3

D
All of the above

Solution

Since plastic is very light, strong, durable, and 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.
Therefore, the correct option is $$D$$.
Question 5
1 / -0

The world's first fully synthetic plastic was:

A
Polystyrene

B
Nylon

C
Bakelite

D
Teflon

Solution

The world's first fully synthetic plastic was bakelite, invented in New York in 1907 by Leo Baekeland who coined the term plastics. Bakelite is made from carbolic acid (phenol) and formaldehyde and is referred to as a phenolic resin. Bakelite was the first thermosetting plastic.
Hence, the correct option is $$C$$.
Question 6
1 / -0

Plastic is bad for environment because :

A
They are non-biodegradable

B
They harm aquatic life

C
They are toxin carrier

D
All of these

Solution

Plastic poses several environmental risks, including leaching chemicals and toxins into surrounding ecosystems, threatening the health of local animal populations, and releasing greenhouse gases into the air. plastic is non-biodegradable. The negative effects of plastic vary depending on the type of plastic in the environment, quantity, and length of exposure time. Plastics contain compounds, such as PVC and BPA, elements deemed a health risk to humans and animals while the leaching of these compounds into air and waterways poses a health and safety risk for nearby organisms.
Question 7
1 / -0

Nylon is obtained by:

A
treating wood pulp

B
solidifying water

C
mixing coal, air and water

D
mixing chemicals

Solution

Nylon was the first commercially synthesized fiber. The production of nylon was started almost simultaneously in New York and London, thus it got its name (NY for New York and Lon for London) as nylon. Nylon is synthesized from coal, water, and air. The fiber of nylon is very strong and it also resembles silk.
Question 8
1 / -0

Which is NOT the general characteristics of plastics?

A
Good electrical insulators

B
Acceptable acoustic insulation

C
Resistant to corrosion and many chemical factors

D
Have a high production cost

Solution

The properties and characteristics of most plastics (though not always fulfilled in certain special plastics) are these:
Easy to work and shape,
Have a low production cost,
Possess low density,
Tend to be waterproof,
Good electrical insulators,
Acceptable acoustic insulation,
Good thermal insulation, but most can not withstand very high temperatures,
Resistant to corrosion and many chemical factors;
Question 9
1 / -0

______ is a popular polyester.

A
Plastic

B
Polythene

C
Rayon

D
Terylene

Solution

Terylene is a popular trademark of synthetic polyester fiber. The fabric is based on terephthalic acid, characterized by lightness and crease resistance, and used for clothing, sheets, ropes, sails, etc.
option $$D$$ is correct.
Question 10
1 / -0

Which of the followings prove that plastics do not make food and medicine toxic?

A
Milk pouches

B
Edible oil container

C
Ice-cream packs

D
All of these

Solution

Plastics are not toxic when coming in contact with food and medicines if they are synthesized according to permissible standards. Plastics are used world-over because they are safe for the packaging of foods and medicine. A few examples are - milk pouches, edible oil containers, ice-cream packs, packs for tablets, and capsules. The I.V. fluids and blood are also collected and stored in plastic bags.

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Synthetic Fibres and Plastics Test - 27

Result

Synthetic Fibres and Plastics Test - 27

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SHARING IS CARING

Question 1

Biodegradable substance

Non-biodegradable substance

Recyclable substance

None of the above

Solution

Question 2

They are usually light

They are derived from petroleum

They are man-made ploymers

They are good conductor of electricity in molten state

Solution

Question 3

Cotton fibre

Silk thread

Plastic thread

Nylon fibre

Solution

Question 4

1

2

3

All of the above

Solution

Question 5

Polystyrene

Nylon

Bakelite

Teflon

Solution

Question 6

They are non-biodegradable

They harm aquatic life

They are toxin carrier

All of these

Solution

Question 7

treating wood pulp

solidifying water

mixing coal, air and water

mixing chemicals

Solution

Question 8

Good electrical insulators

Acceptable acoustic insulation

Resistant to corrosion and many chemical factors

Have a high production cost

Solution

Question 9

Plastic

Polythene

Rayon

Terylene

Solution

Question 10

Milk pouches

Edible oil container

Ice-cream packs

All of these

Solution

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