Synthetic Fibres And Plastics Test

Result

Synthetic Fibres And Plastics Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following statements are true?

I. Plastics are generally good conductors of electricity.
II. Ropes made of bakelite are used in cranes and elevators.
III. Teflon is a special plastic to which oil and water do not stick.
IV. Plastic is non-biodegradable and hence, not environment friendly.

A
I and II

B
III and IV

C
I and III

D
II and IV

Solution

Option (2) is correct as:
(III) Teflon is a special plastic to which oil and water do not stick and is used to make non-stick cookware.
(IV) Plastic is non-biodegradable and hence, not environment friendly.

Whereas statements I and II are incorrect as:
(I) Plastic are poor electrical conductors, and are called insulators.
(II) Ropes made of nylon used in cranes and elevators.
Question 2
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Nimit prepared a flowchart to show classification of fibres and plastics. He left a few columns blank. Fill in the blanks by choosing the option with correct words.

A

P Q R S

Plant fibres Animal fibres Thermoplastics Thermosetting

B

P Q R S

Animal fibres Plant fibres Thermosetting Thermoplastics

C

P Q R S

Rayon Animal fibres Biodegradable Non-biodegradable

D

P Q R S

Animal fibres Plant fibres Non-biodegradable Biodegradable

Solution
Question 3
1 / -0

Which of the following is not a thermosetting plastic?

A
Polyurethane

B
Polyvinyl chloride

C
Bakelite

D
Melamine

Solution

Polyvinyl chloride is not a thermosetting plastic, but a thermoplastic.
Question 4
1 / -0

Nisha has four dresses, made up of four different fabrics:
'A' is made of cotton, 'B' is of silk, C is of rayon and `D` is of polyester.

Which dress should she wear during a journey so that it does not get wrinkled easily?

A
Dress 'A'

B
Dress 'B'

C
Dress 'C'

D
Dress 'D'

Solution

Fabric made from polyester does not wrinkle easily. It remains crisp and easy to wash. So, it is quite suitable to wear it, during the journey.
Question 5
1 / -0

In the following table, match the synthetic materials in the first column with their properties in the second column:

1. Bakelite (i) Fire-resistant

2. Melamine (ii) Deformable

3. Teflon (iii) Poor conductor of electricity

4. PVC (iv) Non-stick

A
1 - (i), 2 - (ii), 3 - (iii), 4 - (iv)

B
1 - (iii), 2 - (i), 3 - (iv), 4 - (ii)

C
1 - (ii), 2 - (i), 3 - (iii), 4 - (iv)

D
1 - (iv), 2 - (ii), 3 - (i), 4 - (iii)

Solution

1. Bakelite (iii) Poor conductor of electricity

2. Melamine (i) Fire-resistant

3. Teflon (iv) Non-stick

4. PVC (ii) Deformable
Question 6
1 / -0

Read the statements and choose the appropriate answer.

Statement 1: Fabric made of pure synthetic fibre is not preferred for summer clothing.
Statement 2: Synthetic fibres have low moisture absorbency.

A
Both statement 1 and 2 are true and statement 2 is the correct explanation of statement 1.

B
Both statement 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

C
Statement 1 is true and statement 2 is false.

D
Both statements 1 and 2 are false.

Solution

Synthetic fibre is not preferred for summer clothing as it has low moisture absorbency and does not absorb sweat.
Therefore, the option (1) is correct.
Question 7
1 / -0

Which of the following pairs is not correctly matched?

A
Polyester - Does not wrinkle easily

B
Teflon - Used for making non-stick cookware

C
Rayon - First fully synthetic fibre

D
Nylon - Used for making parachutes and stockings

Solution

Rayon is prepared using cellulose as raw material. So, it is not a fully synthetic fibre.
Hence, the option (3) is incorrectly matched.

Polyester is a synthetic fibre which does not wrinkle easily.
Teflon is a strong synthetic polymer which can be used to make non-stick cookware.
Nylon is stronger than steel wire.
Therefore, it is used to make parachutes.
Question 8
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Directions: Select the option which correctly fill the blanks (A) - (C).

(a) Synthetic fibres are also called ______A ____ fibres.
(b) Synthetic fibres are synthesised from raw materials called ____B____.
(c) Like synthetic fibres, plastic is also a _____C_____.

A
man-made, petrochemicals, polymers

B
natural, petrochemicals, monomers

C
natural, cellulose, polymers

D
man-made, cellulose, monomers

Solution

(a) Synthetic fibres are also called artificial or man-made fibres.
(b) Synthetic fibres are synthesised from raw materials called petrochemicals.
(c) Like synthetic fibres, plastic is also a polymer.
Question 9
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Directions: Read the given passage and fill in the blanks by choosing an appropriate option.

Cellulose is a natural occurring fibre. The walls of a ____(i)_____ are made of cellulose.
It is used in making the synthetic fibre ______(ii)_______ which is resemble the most expensive natural fibre _______(iii)_______ in appearance.

A
(i) animal cell, (ii) cotton, (iii) animal fibre

B
(i) animal cell, (ii) silk, (iii) synthetic wool

C
(i) animal cell, (ii) acrylic, (iii) artificial wool

D
(i) plant cell, (ii) rayon, (iii) silk

Solution

Plant cell wall is made up of cellulose.
Rayon was the first semi-synthetic fibre made by the chemical treatment of wood cellulose.
It resembles the most expensive natural fibre, silk.
Question 10
1 / -0

Directions: Identify A, B, C and D in the following chart.

A
(A) - Rayon
(B) - Acrylic
(C) - Nylon
(D) - Wool

B
(A) - Acrylic
(B) - Rayon
(C) - Nylon
(D) - Wool

C
(A) - Wool
(B) - Acrylic
(C) - Nylon
(D) - Rayon

D
(A) - Wool
(B) - Nylon
(C) - Acrylic
(D) - Rayon

Solution

A. Rayon burns with a smell of paper.
B. Acrylic burns with an acrid odour.
C. Nylon shrinks from the flame and gives the smell of burning plastic.
D. Wool burns with a smell of burning hair.
Question 11
1 / -0

A few polymers grouped together on the basis of some common property as follow:

Group I: Nylon, Hemp, cotton, jute
Group II: Bakelite Melamine, PVC
Group III: Polycot, terry wool, acrylic.

Choose odd one out in the group I, II and III

A
Group I - Nylon
Group II - PVC
Group III - Acrylic

B
Group I - Cotton
Group II - Melamine
Group III - Acrylic

C
Group I - Jute
Group II - Melamine
Group III - Terry wool

D
Group I - Hemp
Group II - Melamine
Group III - Acrylic

Solution

Group I - Nylon is a synthetic fibre, but all others are natural.
Group II - PVC is a thermoplastic where as all others are thermosetting plastics.
Group III - Acrylic is not a blended fibre.
Question 12
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________ is a natural protein fibre, some forms of which can be woven into textiles.

A
Spandex

B
Silk

C
Kente cloth

D
Linen

Solution

Silk is a protein fibre made up of fibroin protein secreted by the silkworm to make its cocoon.
Linen is a cellulose fibre, whereas spandex is a synthetic fibre.
Kente cloth is the name given to fabric woven in a particular style.

Question 13

1 / -0

Select the option that correctly fills the blanks in the given statements.

I. __(i)__ fibres are produced by plants, animals and geological processes. They are __(ii)__ over time.
II. __(iii)__ fibre is used for making paper.
III. __(iv)__ is a naturally occurring mineral fibre.
IV. __(v)__ and __(vi)__ are examples of cellulose fibres.

	(i)	(ii)	(iii)	(iv)	(v)	(vi)
(1)	Cotton	natural fibres	Wood	Hemp	Asbestos	natural fibres
(2)	Natural	biodegradable	Wood	Asbestos	Cotton	hemp
(3)	Hemp	wood	Asbestos	Natural fibre	Biodegradable	cotton
(4)	Natural	asbestos	Cotton	Wood	Hemp	asbestos

(1)

(2)

(3)

(4)

Solution

I. Natural fibres are produced by plants, animals and geological processes. They are biodegradable over time.
II. Wood fibre is used for making paper.
III. Asbestos is a naturally occurring mineral fibre.
IV. Cotton and hemp are examples of cellulose fibres.
Hence, option (2) is correct.

Question 14
1 / -0

Which element is used for the vulcanisation of rubber?

A
Magnesium

B
Sulphur

C
Copper

D
Phosphorus

Solution

Vulcanisation is a chemical process for converting natural rubber or related polymers into more durable materials by heating them with sulphur.
Question 15
1 / -0

_____________ is stronger than a steel wire.

A
Cotton fibre

B
Silk thread

C
Plastic thread

D
Nylon fibre

Solution

Nylon fibre has a lot of tensile strength and is stronger than a steel wire.
This property makes it a suitable material for making parachutes and ropes for mountain climbers.

Question 16

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Study the dichotomous key and identify W, X, Y and Z.

I. (i) A regenerated fibre
(ii) Purely synthetic fibre Go to II

II. (i) Resembles wool
(ii) Has a silk-like sheen Go to III

III. (i) Is a polyamide
(ii) Is a polyester

	W	X	Y	Z
(1)	Rayon	Acrylic	Nylon	Terylene
(2)	Terylene	Acrylic	Rayon	Nylon
(3)	Acrylic	Terylene	Nylon	Rayon
(4)	Rayon	Nylon	Terylene	Acrylic

(1)

(2)

(3)

(4)

Solution

Rayon is a semi-synthetic fibre, regenerated from wood cellulose by treatment with chemicals like NaOH.
Acrylic fibres resemble wool.
Both nylon and terylene have a lustre like silk, but nylon is a polyamide (chain of amide molecules) and terylene, also known as dacron, is a polyester (chain of ester molecules).

Question 17
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________ is a polyester used for making bottles, utensils, films.

A
Leather

B
Nylon

C
PET

D
Plastic

Solution

Polyethylene Terephthalate, known commonly as PET or PETE, is the clear plastic used for water and soda bottle containers.
It is an example of polyesters as it is formed by the linking together of ester molecules.
Question 18
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Polyester is formed by the repeating units of _______.

A
ether

B
beads

C
carbon

D
ester

Solution

The repeating units in polyesters are esters, which are organic compounds having a fruity odour.
Question 19
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Observe the following flow chart and select the correct statements about P, Q, R and S:

I. P is used to make blankets.
II. Q is said to be first commercially produced in New York and London.
III. R is also called spandex.
IV. S is a polyamide.

A
I and II only

B
I, II and III only

C
II, III and IV only

D
III and IV only

Solution

Statements I, II and III are correct.
Statement IV is incorrect because dacron is a polyester, not a polyamide.
Question 20
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Read the two statements given below and select the correct option.

Statement I: Synthetic fibres are used to make medicine capsules and to give internal stitches during surgeries.
Statement II: These fibres are biodegradable.

A
Both statements I and II are correct and statement II is the correct reason for statement I.

B
Both statements I and II are correct, but statement II is not the correct reason for statement I.

C
Statement I is correct, but statement II is incorrect.

D
Both statements I and II are incorrect.

Solution

Both statements I and II are correct and statement II is the correct reason for statement I.
Some biodegradable synthetic polymers have been designed which can be broken down by the enzymes in the bodies of living organisms and are used to make medicine capsules and to give internal stitches during surgeries.

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Re-Attempt Weekly Quiz Competition

1. Bakelite	(i) Fire-resistant
2. Melamine	(ii) Deformable
3. Teflon	(iii) Poor conductor of electricity
4. PVC	(iv) Non-stick

P	Q	R	S
Plant fibres	Animal fibres	Thermoplastics	Thermosetting

P	Q	R	S
Animal fibres	Plant fibres	Thermosetting	Thermoplastics

P	Q	R	S
Animal fibres	Plant fibres	Non-biodegradable	Biodegradable

Synthetic Fibres And Plastics Test - 4

Result

Synthetic Fibres And Plastics Test - 4

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Rank

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Question 1

I and II

III and IV

I and III

II and IV

Solution

Question 2

P Q R S Plant fibres Animal fibres Thermoplastics Thermosetting

P Q R S Animal fibres Plant fibres Thermosetting Thermoplastics

P Q R S Rayon Animal fibres Biodegradable Non-biodegradable

P Q R S Animal fibres Plant fibres Non-biodegradable Biodegradable

Solution

Question 3

Polyurethane

Polyvinyl chloride

Bakelite

Melamine

Solution

Question 4

Dress 'A'

Dress 'B'

Dress 'C'

Dress 'D'

Solution

Question 5

1 - (i), 2 - (ii), 3 - (iii), 4 - (iv)

1 - (iii), 2 - (i), 3 - (iv), 4 - (ii)

1 - (ii), 2 - (i), 3 - (iii), 4 - (iv)

1 - (iv), 2 - (ii), 3 - (i), 4 - (iii)

Solution

Question 6

Both statement 1 and 2 are true and statement 2 is the correct explanation of statement 1.

Both statement 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

Statement 1 is true and statement 2 is false.

Both statements 1 and 2 are false.

Solution

Question 7

Polyester - Does not wrinkle easily

Teflon - Used for making non-stick cookware

Rayon - First fully synthetic fibre

Nylon - Used for making parachutes and stockings

Solution

Question 8

man-made, petrochemicals, polymers

natural, petrochemicals, monomers

natural, cellulose, polymers

man-made, cellulose, monomers

Solution

Question 9

(i) animal cell, (ii) cotton, (iii) animal fibre

(i) animal cell, (ii) silk, (iii) synthetic wool

(i) animal cell, (ii) acrylic, (iii) artificial wool

(i) plant cell, (ii) rayon, (iii) silk

Solution

Question 10

(A) - Rayon (B) - Acrylic (C) - Nylon (D) - Wool

(A) - Acrylic (B) - Rayon (C) - Nylon (D) - Wool

(A) - Wool (B) - Acrylic (C) - Nylon (D) - Rayon

(A) - Wool (B) - Nylon (C) - Acrylic (D) - Rayon

Solution

Question 11

Group I - Nylon Group II - PVC Group III - Acrylic

Group I - Cotton Group II - Melamine Group III - Acrylic

Group I - Jute Group II - Melamine Group III - Terry wool

Group I - Hemp Group II - Melamine Group III - Acrylic

Solution

Question 12

Spandex

Silk

Kente cloth

Linen

Solution

P Q R S

Plant fibres Animal fibres Thermoplastics Thermosetting

P Q R S

Animal fibres Plant fibres Thermosetting Thermoplastics

P Q R S

Rayon Animal fibres Biodegradable Non-biodegradable

P Q R S

Animal fibres Plant fibres Non-biodegradable Biodegradable

(A) - Rayon
(B) - Acrylic
(C) - Nylon
(D) - Wool

(A) - Acrylic
(B) - Rayon
(C) - Nylon
(D) - Wool

(A) - Wool
(B) - Acrylic
(C) - Nylon
(D) - Rayon

(A) - Wool
(B) - Nylon
(C) - Acrylic
(D) - Rayon

Group I - Nylon
Group II - PVC
Group III - Acrylic

Group I - Cotton
Group II - Melamine
Group III - Acrylic

Group I - Jute
Group II - Melamine
Group III - Terry wool

Group I - Hemp
Group II - Melamine
Group III - Acrylic