Tag: some commercially important polymers

Questions Related to some commercially important polymers

Which of the following are addition polymers?

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Nylon

  2. Melamine formaldehyde resin

  3. Orlon

  4. All of the above

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Correct Option: C
Explanation:

Orlon is an addition polymers as its molecular mass is integral multiple of molecular mass of its monomer.

Which of the following is a monomer of teflon?

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Difluoroethane

  2. Trifluoroethane

  3. Tetrafluoroethane

  4. None of these

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Correct Option: C
Explanation:

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.

Which of the following polymer form net like structure ?

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Butyl rubber

  2. Polythene

  3. Polystyrene

  4. Melamine

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Correct Option: D
Explanation:

Thermosetting polymers have a net-like structure because of the presence of cross-links between different polymeric chains. Among the given only melanin polymer is a thermosetting polymer, so it has a net-like structure. 


Note: Butyl rubber is a Westerner whereas polythene and polystyrene we thermoplastics.

Which of the following is/are true statement(s) for the preparation of Teflon?

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. It is produced by condensation polymerization

  2. Water acts as catalyst

  3. The monomer used is tetrafluoroethane

  4. The monomer is obtained from carbon tetrachloride

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Correct Option: B
Explanation:

 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.

Which names are associated with PMMA?

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Melmac

  2. Acrilan

  3. Saran

  4. Acrylite

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Correct Option: D
Explanation:

The name acrylite is associated with PMMA.
PMMA is polymethyl methaacrylate. It is an addition homopolymer of methyl methacrylate ($\displaystyle CH _2 =C(CH _3)COOCH _3 $). It is known as plexiglass.

Nylon threads are made of ________.

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. polyethylene polyemer

  2. polyvinyl polymer

  3. polyester polymer

  4. polyamide polymer

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Correct Option: D
Explanation:

Nylon threads are polymer of polyamides obtained by condensing amides and /or carboxylic acids 
Examples are nylon - $6$, nylon - $6,: 6$.

STATEMENT-1 : PMMA (Polymethyl methacrylate) is used for making lenses and light covers.
STATEMENT-2 : It has excellent light transmission properties.

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. STATEMENT-1 is True, STATEMENT-2 is True, STATEMENT-2 is a correct explanation for STATEMENT-1

  2. STATEMENT-1 is True, STATEMENT-2 is True, STATEMENT-2 is NOT a correct explanation for STATEMENT-1

  3. STATEMENT-1 is True, STATEMENT-2 is False

  4. STATEMENT-1 is False, STATEMENT-2 is True

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Correct Option: A
Explanation:

PMMA (polymethyl methacrylate) is a widely commercially used bio-degradable polymer. It has excellent light transmission properties, due to which it is used for making lenses and light covers. 

List-l                         List-ll                                    
A)Rayon                   1)$CH _{2}O+C _{6}H _{5}OH$


B)Silicone polymers  2) $F _{2}C= CF _{2}$
 
                                             R
                                              |
C) Bakelite              3)  HO-Si-OH
                                              |
                                              R
D) Teflon                     4)Cellulose

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. A-4 B-3 C-1 D-2

  2. A- 1 B-3 C-2 D-4

  3. A-4 B-2 C-3 D-1

  4. A-2 B-4 C-3 D-1

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Correct Option: A
Explanation:

(A) Rayon:- Cellulose, organic polymer


(B) Silicone polymers consist of Si atom. Thus option 2.

(C) Bakelite:- condensation polymer formed by phenol and formaldehyde network structure


(D) Teflon:- Tetrafluoro ethene get polymerize forming teflon

A-4, B-3, C-1, D-2

A: Polymethyl methacrylate is also known as plexi glass.
R: PMMA is used in decorative articles.

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Both A and R are correct and R is the correct explanation of the A

  2. Both A and R are correct but R is not the correct explanation of the A

  3. A is correct but R is in correct

  4. A is incorrect but R is correct

Show answer
Correct Option: B
Explanation:

Polymethyl methacrylate is also known as plexi glass.
PMMA is polymethyl methaacrylate. It is an addition hopolymer of methyl methacrylate ($\displaystyle CH _2 =C(CH _3)COOCH _3 $).
PMMA is used in decorative articles, lenses, sign borads and aircraft windows.

Which of the following fibres are made up of polyamides?

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Wool

  2. natural silk

  3. Artifical silk

  4. Nylon

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Correct Option: A,B,D