Polymers Test

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Polymers Test - 30

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Weekly Quiz Competition

Question 1
1 / -0

Match column I with column II.
Column I Column II
P. Non-stick coating (i). Melamine
Q. Flame resistant (ii). Polystyrene
R. First fully synthetic fibre (iii). Teflon
S. Thermoplastic (iv). Nylon
Choose the correctly matched option.

A
(P) - (ii), (Q) - (i), (R) - (iii), (S) - (iv)

B
(P) - (iii), (Q) - (i), (R) - (iv), (S) - (ii)

C
(P) - (ii), (Q) - (iii), (R) - (iv), (S) - (i)

D
(P) - (iii), (Q) - (iv), (R) - (ii), (S) - (i)

Solution

P. Teflon is polytetrafluoroethylene. It is non reactive, hydrophobic and highly strong carbon-flourine bond.

Q. Melamine is mixed with resins and has fire retardant properties due to its release of nitrogen gas when burned or charred.

R. Nylon is a synthetic fabric made from petroleum products. It is very light, strong and durable.

S. Polystyrene is a synthetic aromatic polymer made from monomer styrene. As a thermoplastic it is in a solid state at room temperature but flows if heated above $$100^0C$$.

Hence, option B os correct.
Question 2
1 / -0

Identify the fibres, $$P,\,Q$$ and $$R$$ using the given hints.
$$P.\;\;$$ It does not get wrinkled easily, remains crisp and is easy to wash.
$$Q.\;\;$$ It was the first fully synthetic fibre.
$$R.\;\;$$ Although it is obtained from a natural source, yet it is a man-made fibre.

A
P - Rayon, Q - Polythene, R - Terylene

B
P - Polyester, Q - Nylon, R - Rayon

C
P - Nylon, Q - Polythene, R - Bakelite

D
P - Melamine, Q - Nylon, R - Polyester

Solution

Polyester is a category of polymers that contain the ester functional group in their main chain. It does not get wrinkled easily, remains crisp and is easy to wash.

Nylon is a generic designation for a family of synthetic polymers, based on aliphatic or semi-aromatic polyamides. Nylon is a thermoplastic silky material that can be melt-processed into fibres, films, or shapes. It is made of repeating units linked by amide links similar to the peptide bonds in proteins. It was the first fully synthetic fibre.

Rayon is a regenerated cellulose fibre that is made from natural sources of cellulose, such as wood and related agricultural products. It has the same molecular structure as cellulose. Although it is obtained from a natural source, yet it is a man-made fibre.

Question 3

1 / -0

Match the terms of column A correctly with the phrases given in column B.

Column-A	Column-B
(i) Polyester	(a) Prepared by using wood pulp
(ii) Teflon	(b) Used for making parachutes and stockings
(iii) Rayon	(c) Electrical switches
(iv) Nylon	(d) Fabrics do not wrinkle easily
(v) Bakelite	(e) Fire resistant clothes
(vi) Melamine	(f) Used to make non-stick cookwares

(i)-(d), (ii)-(f), (iii)-(a), (iv)-(b), (v)-(c), (vi)-(e)

(i)-(f), (ii)-(d), (iii)-(a), (iv)-(b), (v)-(c), (vi) -e)

(i)-(d), (ii)-(f), (iii)-(b), (iv)-(a), (v)-(c), (vi)-(e)

(i)-(a), (ii)-(f), (iii)-(d), (iv)-(b), (v)-(c), (vi)-(e)

Solution

Polyester is a category of polymers that contain the ester functional group in their main chain. As a specific material, it most commonly refers to a type called polyethylene terephthalate (PET). Polyester fabrics can provide specific advantages over natural fabrics, such as improved wrinkle resistance, durability and high color retention.

Polytetrafluoroethylene or Teflon or PTFE is used as a non-stick coating for pans and other cookware. It is very non-reactive, partly because of the strength of carbon–fluorine bonds and so it is often used in containers and pipework for reactive and corrosive chemicals. Where used as a lubricant, PTFE reduces friction, wear and energy consumption of machinery.

Rayon is a man-made redeveloped cellulose fiber. Rayon is produced from naturally occurring polymers like wood pulp

Nylon : It is used for making parachutes and stockings

Bakelite : It is used for making Electrical switches

Melamine : It is used for making fire-resistant clothes

Option A is ocrrect.

Question 4
1 / -0

Fomaldehyde is the starting material for the manufacture of :

A
Bakelite

B
Caprolactam

C
D.D.T

D
Rayon
Question 5
1 / -0

Sulphur is used in:

A
welding

B
electroplating

C
vulcanising rubber

D
the manufacture of paints

Solution

Vulcanization is addition of sulphur in natural rubber by chemical process to improve its durability.
Question 6
1 / -0

The process by which smaller molecules combine to give a molecule with a higher molecular weight is known as :

A
condensation

B
polymerisation

C
catenation

D
isomerisation

Solution

Polymerisation is the joining together of two or more simple molecules called Monomers to form a new compound of the same empirical formula called a polymer which has higher molecular weight.
Question 7
1 / -0

The cross-linked polymers possess the property of:

A
being soluble in common organic solvents

B
not undergoing change while being heated

C
forming a hard mass which can be remoulded

D
high resistance to heat and mechanical deformation

Solution

The cross-linked polymers possess the property of high resistance of heat and mechanical deformation. Cross-links are the characteristic property of thermosetting plastic materials.
Question 8
1 / -0

Nylon-66 is a _____.

A
natural polymer

B
synthetic polymer

C
mixed polymer

D
polyester

Solution

Nylon-66 is a synthetic polymer. It is a polyamide. The monomers are hexamethylenediamine and adipic acid.
Question 9
1 / -0

What is Modacrylic?

A
Modified acrylic

B
Natural fibre acrylic

C
Acrylic and polyester

D
None of above

Solution

The above structure is modacrylic or modified acrylic. Modacrylic is a modified acrylic fiber that contains at least 35% and at most 85% acrylonitrile monomer. The co-monomers vinyl chloride, vinylidene chloride or vinyl bromide (as shown in the above figure) used in modacrylic give the fiber flame retardant properties. End-uses of modacrylic include faux fur, wigs, hair extensions and protective clothing.
Option A is correct.
Question 10
1 / -0

Which of the following is a blended fibre?

A
Polycot

B
Polyester

C
Terylene

D
Elastane

Solution

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Re-Attempt Weekly Quiz Competition

Column I	Column II
P. Non-stick coating	(i). Melamine
Q. Flame resistant	(ii). Polystyrene
R. First fully synthetic fibre	(iii). Teflon
S. Thermoplastic	(iv). Nylon

Polymers Test - 30

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Polymers Test - 30

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Question 1

(P) - (ii), (Q) - (i), (R) - (iii), (S) - (iv)

(P) - (iii), (Q) - (i), (R) - (iv), (S) - (ii)

(P) - (ii), (Q) - (iii), (R) - (iv), (S) - (i)

(P) - (iii), (Q) - (iv), (R) - (ii), (S) - (i)

Solution

Question 2

P - Rayon, Q - Polythene, R - Terylene

P - Polyester, Q - Nylon, R - Rayon

P - Nylon, Q - Polythene, R - Bakelite

P - Melamine, Q - Nylon, R - Polyester

Solution

Question 3

(i)-(d), (ii)-(f), (iii)-(a), (iv)-(b), (v)-(c), (vi)-(e)

(i)-(f), (ii)-(d), (iii)-(a), (iv)-(b), (v)-(c), (vi) -e)

(i)-(d), (ii)-(f), (iii)-(b), (iv)-(a), (v)-(c), (vi)-(e)

(i)-(a), (ii)-(f), (iii)-(d), (iv)-(b), (v)-(c), (vi)-(e)

Solution

Question 4

Bakelite

Caprolactam

D.D.T

Rayon

Question 5

welding

electroplating

vulcanising rubber

the manufacture of paints

Solution

Question 6

condensation

polymerisation

catenation

isomerisation

Solution

Question 7

being soluble in common organic solvents

not undergoing change while being heated

forming a hard mass which can be remoulded

high resistance to heat and mechanical deformation

Solution

Question 8

natural polymer

synthetic polymer

mixed polymer

polyester

Solution

Question 9

Modified acrylic

Natural fibre acrylic

Acrylic and polyester

None of above

Solution

Question 10

Polycot

Polyester

Terylene

Elastane

Solution

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