Synthetic Fibres and Plastics Test

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Synthetic Fibres and Plastics Test - 21

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Weekly Quiz Competition

Question 1

1 / -0

Match the column I with Column II and choose the correct option using the codes given below.

	column I		Column II
(a)	A fibre obtained by chemical treatment of wood pulp	(i)	Melamine
(b)	A fibre stronger than steel wire	(ii)	Acrylic
(c)	A fibre known as artificial wool	(iii)	Rayon
(d)	A fire-proof plastic	(iv)	Nylon

(a) - (i), (b) - (iv), (c) - (iii), (d) - (ii)

(a) - (iv), (b) - (i), (c) - (iii), (d) - (ii)

(a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)

(a) - (ii), (b) - (i), (c) - (iv), (d) - (iii)

Solution

A fire-proof plastic - Melamine.
Artificial wool is prepared from another type of synthetic fibre called acrylic. The wool obtained from natural sources is quite expensive.
a nylon thread is stronger than a steel wire, also nylon fibre is strong, elastic and light.
Such a fibre was obtained by chemical treatment of wood pulp. This fibre was called rayon or artificial silk.

Question 2
1 / -0

Which of the following are incorrectly matched ?

A
(i) and (ii)

B
(i), (ii) and (iii)

C
(i), (iii) and (iv)

D
All of these

Solution

A thermoplastic becomes soft when heated and hard when cooled. They can be recycled. Thermoplastic is obtained by the artificial method.

Jute is one of the most affordable natural fibers. Jute fibers are composed primarily of the plant materials cellulose and lignin.

Cellulose is found naturally. It is a long chain of linked sugar molecules that gives wood its remarkable strength. It is the main component of plant cell walls and the basic building block for many textiles and for paper.

Polyethylene is classified into several different categories based mostly on its density and branching. It is a synthetic (artificial) polymer

(i),(iii) & (iv) are incorrectly matched.
Option $$C$$ is the correct answer.
Question 3
1 / -0

Read the following statement and mark the correct answer.
I. Artificially prepared synthetic fibre which resembles silk is known as terylene.
II. Rayon is not considered a synthetic fibre as it is regenerated from cellulose.
III. Bottles and jars are made up of PET.

A
Statement I is false, II and III are true

B
Statement I is true, II and III are false

C
Statement I and II are false, III is true

D
Statement II is true, I and II are false

Solution

1. Terylene is a synthetic polyester fibre whereas rayon is artificial silk
Thus, the statement $$I$$ is false.

2. Rayon was the first manufactured fibre. It is made from wood pulp, a naturally occurring, cellulose-based raw material. But it requires chemical processing. So, rayon is neither considered a synthetic fibre nor a natural fibre. Instead, it is considered to be a semi-synthetic fibre. Thus, the statement $$II$$ is true.

3. PET is used to make bottles and jars. Thus, the statement $$III$$ is true.

Hence, the correct option is $$\text{A}$$.
Question 4
1 / -0

The fibre developed in Newyork & London simultaneously is known as:

A
rayon

B
silk

C
PVC

D
nylon

Solution

It was a polymer which apparently was developed together unknowingly in two cities - New York and London.
It is said that they both presented it in the international seminar or something and hence it got its name NY-New York and LON for London..
Question 5
1 / -0

Why is the waste created by plastics not friendly to the environment?

A
Plastics are non-biodegradable.

B
Plastics are biodegradable.

C
On burning, they cause pollution due to evolution of poisonous gases.

D
Both A and C

Solution

Plastic is non-biodegradable that is, it can not be broken down by natural organisms. Thus, it acts as a source of pollution. On burning, they release various gas that causes pollution like dioxins, furans, mercury, etc into the atmosphere that poses a threat to vegetation and human and animal health.
Hence, option $$D$$ is correct.
Question 6
1 / -0

Which of the following is used to make disposable cups?

A
Low density polyethylene

B
Polypropylene

C
Polystyrene

D
PVC

Solution

Disposable cups are made up of thermocol. It is a synthetic petroleum product which is made by restructuring of the chemical bonding of the polystyrene, to develop a stretch polystyrene. In this process, thermoplastic granules are expanded through the application of steam and air. The expanded granules become large and light in weight.
Question 7
1 / -0

The fibre obtained from cellulose is:

A
polyester

B
nylon

C
acrylic

D
rayon

Solution

The fibre obtained from cellulose is rayon.

Because of the reconversion of the soluble compound to cellulose, rayon is referred to as a regenerated cellulose fibre.

There are several types of rayon fibers in commercial use today, named according to the process by which the cellulose is converted to the soluble form and then regenerated.

Thus, option $$D$$ is correct.
Question 8
1 / -0

Which of the following material is responsible for the cause of animal death?

A
Paper

B
Plastic

C
Grass

D
None of the above

Solution

Plastics take several years to decompose, they are not environmental friendly and cause pollution. Each year many marine animals, sea birds, etc die by ingesting or getting entangled in plastic.
Paper and grass and environment friendly and therefore, do not cause harm.
So, option B is correct.
Question 9
1 / -0

Which among the following plastic does not belong to either thermoplastic or thermosetting?

A
PVC

B
Bakelite

C
Melamine

D
Teflon

Solution

Polythene and PVC are some of the examples of thermoplastics.

Examples of thermosetting are bakelite and melamine.

Teflon is neither thermoplastic nor thermosetting.

Hence option D is correct
Question 10
1 / -0

A non-biodegradable waste is:

A
metallic tins

B
plastic

C
polythene

D
All the above

Solution

Non-Biodegradable wastes cannot be broken down by natural organisms such as bacteria and act as a source of pollution.
Examples of non-biodegradable waste are glass, metal, plastic bags, plastic bottles, etc.
Hence, option D is correct.

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Synthetic Fibres and Plastics Test - 21

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Synthetic Fibres and Plastics Test - 21

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Question 1

(a) - (i), (b) - (iv), (c) - (iii), (d) - (ii)

(a) - (iv), (b) - (i), (c) - (iii), (d) - (ii)

(a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)

(a) - (ii), (b) - (i), (c) - (iv), (d) - (iii)

Solution

Question 2

(i) and (ii)

(i), (ii) and (iii)

(i), (iii) and (iv)

All of these

Solution

Question 3

Statement I is false, II and III are true

Statement I is true, II and III are false

Statement I and II are false, III is true

Statement II is true, I and II are false

Solution

Question 4

rayon

silk

PVC

nylon

Solution

Question 5

Plastics are non-biodegradable.

Plastics are biodegradable.

On burning, they cause pollution due to evolution of poisonous gases.

Both A and C

Solution

Question 6

Low density polyethylene

Polypropylene

Polystyrene

PVC

Solution

Question 7

polyester

nylon

acrylic

rayon

Solution

Question 8

Paper

Plastic

Grass

None of the above

Solution

Question 9

PVC

Bakelite

Melamine

Teflon

Solution

Question 10

metallic tins

plastic

polythene

All the above

Solution

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