Synthetic Fibres And Plastics Test

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Synthetic Fibres And Plastics Test - 5

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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
1 / -0

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

Bamboo is an important requirement in sericulture. How is bamboo useful for sericulture?

(i) Making trays for feeding the larvae.
(ii) Making montages for the production of cocoons.
(iii) Making chambers for storing the eggs.
(iv) Making tools for unwinding the threads.

A
Only (i) and (iii)

B
Only (i) and (ii)

C
Only (ii) and (iii)

D
Only (ii) and (iv)

Solution

Bamboo trays are used for feeding the larvae.
Also, montages are formed in the bamboo trays to which cocoons get attached.
Question 5
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 6

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

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

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

Question 7
1 / -0

You have some raw cotton in your hand. Pinch some cotton between the thumb and finger of the other hand. Now, start pulling out the cotton while continuously twisting the fibres. What do you get by doing this?

A
Formation of fibre

B
Formation of fabric

C
Formation of yarn

D
Formation of loop

Solution

Fibres from cotton are drawn out and twisted. This brings the fibres together to form the yarn.
Question 8
1 / -0

Smita was wearing a nylon dress while cooking on a gas stove. Her father told her to change her dress and wear a cotton dress for working near the gas stove. Why do you think the nylon dress was not suitable while working in the kitchen?

A
Nylon dress would get dirty and the stains would be difficult to remove.

B
It does not retain its shape when it gets heated near the gas stove.

C
It catches fire easily, melts on heating and sticks to the body.

D
It gets wet due to the heat near the gas stove.

Solution

Nylon is a synthetic fibre which melts easily on exposure to heat and sticks to the body.
Question 9
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 10
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 11
1 / -0

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 12
1 / -0

Shekhar wants to make a plastic container that be recycled. Which of the following materials would you suggest him to make such a container?

A
Bakelite

B
Melamine

C
Teflon

D
PVC

Solution

Thermoplastics are a group of plastics that can be recycled because they are a straight chain of polymers and melt on heating.
Polythene and PVC are some of the examples of thermoplastics.

On the other hand, bakelite, melamine and teflon are thermosetting plastics that cannot be recycled because they are resistant to heat.
This is because the polymer chains are cross linked.
Question 13
1 / -0

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 14
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 15
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.

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Re-Attempt Weekly Quiz Competition

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

Synthetic Fibres And Plastics Test - 5

Result

Synthetic Fibres And Plastics Test - 5

Score

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Rank

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SHARING IS CARING

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

Only (i) and (iii)

Only (i) and (ii)

Only (ii) and (iii)

Only (ii) and (iv)

Solution

Question 5

Dress 'A'

Dress 'B'

Dress 'C'

Dress 'D'

Solution

Question 6

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 7

Formation of fibre

Formation of fabric

Formation of yarn

Formation of loop

Solution

Question 8

Nylon dress would get dirty and the stains would be difficult to remove.

It does not retain its shape when it gets heated near the gas stove.

It catches fire easily, melts on heating and sticks to the body.

It gets wet due to the heat near the gas stove.

Solution

Question 9

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 10

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 11

man-made, petrochemicals, polymers

natural, petrochemicals, monomers

natural, cellulose, polymers

man-made, cellulose, monomers

Solution

Question 12

Bakelite

Melamine

Teflon

PVC

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