Polymers Test

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Polymers Test - 12

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Question 1
1 / -0

Natural rubber is a ___.

A
trans isomer

B
cis isomer

C
racemic mixture

D
equal amount of cis and trans

Solution

Natural rubber (as shown in the figure) is formed by polymerization of monomer isoprene.
$$CH_{2}$$
$$\mid$$
$$H_{2}C=C-CH=CH_{2}$$ (Isoprene)
Question 2
1 / -0

A high molecular weight molecule built from a large number of small molecules is called a ____.

A
monomer

B
isomer

C
polymer

D
tautomer

Solution

A polymer is a large molecule composed of many repeated subunits, known as monomers. Because of their broad range of properties, both synthetic and natural polymers play an essential and ubiquitous role in everyday life. Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as DNA and proteins, that are fundamental to biological structure and function.

Polymers, both natural and synthetic, are created via polymerisation of many monomers. Their large molecular mass relative to small molecular compounds produces unique physical properties, including toughness, viscoelasticity and a tendency to form glasses and semicrystalline structures rather than crystals.

Hence, the correct option is $$C$$
Question 3
1 / -0

Teflon is an example of polymer which is a/an

A
polyamide

B
addition Ploymer

C
polyster

D
formaldehyderesin

Solution

TEFLON - It is an addition polymer prepared by heating tetrafluoroetane with a free radical.
$$n CF_{2} = CF_{2} \xrightarrow[High pressure]{Catalyst} -[CF_{2}-CF_{2}-]_{n}$$
Tetrafluoroetane Teflon
POLYAMIDE - These are polymers possessing amide linkage and Teflon doesn't contain any amide linkage.
POLYSTER - These are polycondensation products of dicarboxylic acids and diols.
FORMALDEHYDE RESIN - It can refer to many formaldehyde polymers such as melamine formaldehyde, urea formaldehyde, phenol formaldehyde.
Question 4
1 / -0

The monomer of natural rubber is:

A
butadiene

B
chloroprene

C
isoprene

D
styrene

Solution

The structure of isoprene is given below:
$$H_{2}C=C(CH_3)-CH=CH_{2}$$
Natural rubber is a linear polymer of isoprene. The structure is shown in the figure.
Question 5
1 / -0

Which of the following contains isoprene units?

A
Natural rubber

B
Nylon - $$6,\:6$$

C
Polyethylene

D
Dacron

Solution

NATURAL RUBBER - It contains isoprene units.

NYLON - 6,6 - It is formed by hexamethylenediamine and adipic acid.

POLYTHENE - Polythene is formed by monomers of ethene. It is an addition polymer.

DACRON - Dacron is formed by the interaction of ethylene glycol and terephthalic acid. It is a condensation polymer.
Question 6
1 / -0

Which among the following is a chain growth polymer?

A
Nylon

B
Bakelite

C
Terylene

D
Teflon

Solution

Teflon is a chain-growth polymer manufactured by heating tetrafluoromethane with a free radical or persulphate catalyst at high pressures.

$$n CF_{2} = CF_{2} \xrightarrow [High\ pressure]{catalyst} -[CF_{2}-CF_{2}-] _{n}$$

Tetrafluoroethane Teflon

Whereas, nylon, bakelite and terylene are condensation polymers.
Question 7
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Trans-form of rubber is called ___.

A
Isoprene

B
Neoprene

C
Gutta percha

D
Glyptal

Solution

Gutta percha is called trans-form of rubber, as it is a polymer of isoprene, the basic sub unit in natural rubber.
Question 8
1 / -0

Polymer obtained by condensation polymerization is :

A
polythene

B
teflon

C
PVC

D
bakelite

Solution

Bakelite (as shown in the figure) is formed by condensation reaction of phenol with formaldehyde.
Polythene is an addition polymer formed by addition of ethene monomer.
Teflon is an addition polymer formed by carbon tetraflouride.
Polyvinyl chloride (PVC) is formed by addition of vinyl chloride molecules. It is an addition polymer.
Question 9
1 / -0

Neoprene is:

A
Polyster

B
Polyamide

C
Polysaccharide

D
Polyhalodiene

Solution

Neoprene or polychloroprene is formed by the free radical polymerisation of chloroprene. As the Neoprene structure contains halogen atoms & double bonds, it is also known as polyhalodiene.
Question 10
1 / -0

Polymer used in making capsules is:

A
poly glycolic acid

B
poly lactic acid

C
Nylon - $$2$$ - Nylon - $$6$$

D
PHBV

Solution

PHBV is Poly $$\beta$$ hydroxy butyrate - co -$$\beta$$-hydroxy valerate.
PHBV is used in speciality packaging, orthropaedic devices and in controlled release of drugs. PHBV undergoes bacterial degradation in the environment.

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Polymers Test - 12

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Polymers Test - 12

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Question 1

trans isomer

cis isomer

racemic mixture

equal amount of cis and trans

Solution

Question 2

monomer

isomer

polymer

tautomer

Solution

Question 3

polyamide

addition Ploymer

polyster

formaldehyderesin

Solution

Question 4

butadiene

chloroprene

isoprene

styrene

Solution

Question 5

Natural rubber

Nylon - $$6,\:6$$

Polyethylene

Dacron

Solution

Question 6

Nylon

Bakelite

Terylene

Teflon

Solution

Question 7

Isoprene

Neoprene

Gutta percha

Glyptal

Solution

Question 8

polythene

teflon

PVC

bakelite

Solution

Question 9

Polyster

Polyamide

Polysaccharide

Polyhalodiene

Solution

Question 10

poly glycolic acid

poly lactic acid

Nylon - $$2$$ - Nylon - $$6$$

PHBV

Solution

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