Synthetic Fibres And Plastics Test

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Synthetic Fibres And Plastics Test - 1

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Weekly Quiz Competition

Question 1
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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

(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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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 3
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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 4
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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 5
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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.
Question 6
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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 7
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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 8
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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.

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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

Synthetic Fibres And Plastics Test - 1

Result

Synthetic Fibres And Plastics Test - 1

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

Polyurethane

Polyvinyl chloride

Bakelite

Melamine

Solution

Question 3

Dress 'A'

Dress 'B'

Dress 'C'

Dress 'D'

Solution

Question 4

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 5

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 6

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 7

man-made, petrochemicals, polymers

natural, petrochemicals, monomers

natural, cellulose, polymers

man-made, cellulose, monomers

Solution

Question 8

(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

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