Polymers Test

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Polymers Test - 37

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is a monomer of teflon?

A
Difluoroethane

B
Trifluoroethane

C
Tetrafluoroethane

D
None of these

Solution

Teflon is an addition polymer of tetrafluoroethylene.

$$\underset {\text{tetrafluoroethylene}}{ n{ F }_{ 2 }C=C{ F }_{ 2 } } \xrightarrow [ \text{Pressure}]{ \text{Heat}} \underset { \text{teflon} }{ -{ ({ F }_{ 2 }C-C{ F }_{ 2 })- }_{ n } } $$

It is used to make non-sticky utensils.
Question 2
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In the reaction sequence, (X) is:

A
cyclohexanone

B
caprolactum

C
$$HO(CH_2)_6NH_2$$

D
hexamethylene disocyanate

Solution

Caprolactum is a monomer of nylon-6.
Question 3
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Natural rubber is not used in making footwear for polar regions because:

A
natural rubber becomes soft at temperature lower than $${ 10 }^{ o }C$$

B
natural rubber becomes brittle at temperature lower than $${ 10 }^{ o }C$$

C
natural rubber melts at temperature lower than $${ 10 }^{ o }C$$

D
natural rubber becomes stronger at temperature lower than $${ 10 }^{ o }C$$

Solution

Natural rubber is a thermoplastic. It becomes soft and sticky when heated at high temperature (lower than $${ 62 }^{ o }C$$) and brittle at low temperature $$\left( { 10 }^{ o }C \right) $$. So that's why natural rubber is not used in making footwear for the polar region.
Question 4
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Which of the following is/are true statement(s) for the preparation of Teflon?

A
It is produced by condensation polymerization

B
Water acts as catalyst

C
The monomer used is tetrafluoroethane

D
The monomer is obtained from carbon tetrachloride

Solution

It is produced by addition polymerization. Water acts as a catalyst. The monomer used is tetrafluoroethylene. It is obtained from chloroform.

The option (B) represents a true statement for the preparation of Teflon.
Question 5
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Which of the following statements is not true about low density polythene?

A
Tough

B
Highly branched structure

C
Poor conductor of electricity

D
Hard
Question 6
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Which type of polymer is natural rubber?

A
Condensation polymer

B
Addition polymer

C
Coordination polymer

D
None of the above

Solution

Natural rubber is an addition polymer that is obtained as a milky white fluid known as latex from a tropical rubber tree.

Natural rubber is the polymer of isoprene (2-methyl-1,3-butadiene).

Hence, option B is correct.
Question 7
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Perlon is:

A
terelene

B
nylon-6

C
rubber

D
polyester

Solution

Another name of Perlon is Nylon $$-6$$.
Monomer is $$\longrightarrow$$ Caprolactam.
Question 8
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Bakelite is obtained from phenol by reacting with:

A
$$(CH_2OH)_2$$

B
$$CH_3CHO$$

C
$$CH_3COCH_3$$

D
$$HCHO$$

Solution

Bakelite was the first plastic made from synthetic components. It is a thermosetting phenol formaldehyde resin, formed from a condensation reaction of phenol$$(C_6H_5OH)$$ with formaldehyde$$(HCHO)$$.

Hence, option D is correct.
Question 9
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Which polymer is used in controlled drugs capsules?

A
$$SBR$$

B
$$PTFE$$

C
$$PHBV$$

D
$$PAN$$

Solution

PHBV helps in controlled release of drugs, medical implants and repairs, speciality packaging orthopaedic devices and manufacturing bottles.
Question 10
1 / -0

Dacron (a polymer) is obtained by the condensation polymerization of:

A
Phenol and formaldehyde

B
Phenol and phthalic acid

C
Terepthalic acid and formaldehyde

D
Dimethyl terephthalate and ethylene glycol

Solution

The polymer of ethylene glycol and terephthalic acid is known as terylene or dacron.