Tag: classification of polymers

Quizzes (1) Questions (40)

Questions Related to classification of polymers

Multiple choice classification of polymers introduction to polymers and its classification polymer polymers chemistry

Which of the following is thermally stable?

  1. Silicone polymers

  2. Rayon

  3. Bakelite

  4. Perlon - L
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Silicones are polymers that include silicon together with carbon, hydrogen and oxygen.They have an alternating $  -Si-O-Si-  $ type structure. Silicones are water repellent, very resistant to chemical attack and are thermally stable since they do not decompose at high temperature.

Multiple choice classification of polymers introduction to polymers and its classification polymer polymers chemistry

Suppose A and B are two monomers.
Match the following types of Copolymers with their correct arrangements.


List - I                                                List - II
(i) Random Copolymer                       1) (A-A-A-A)-(B-B-B-B)-(A-A-A)

(ii) Block Copolymer                          2) -A-B-A-B-A.

(iii) Graft Copolymer                          3) -A-B-A-A-A-B-B-A-B-A-A-

                                                                                      B-B-B-B-
                                                                                      $|$
(iv) Alternating Copolymer                4)-A-A-A-A-A-A-A-A-A-
                                                                     $|$
                                                                    B-B-B-B-

  1. (i)-1, (ii)-2, (iii)-3, (iv)-4

  2. (i)-2, (ii)-4, (iii)-3, (iv)-1

  3. (i)-3, (ii)-1, (iii)-4, (iv)-2

  4. (i)-4, (ii)-3, (iii)-1, (iv)-2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A) Random copolymer is that in which there is no specific arrangement of monomers, but it is formed by two or more than two monomers.
B) Block copolymer is (A-A-A-A)-(B-B-B-B)-(A-A-A-A)-, as the polymer is divided in subunits (blocks) of a single type of monomer.
C) Graft means branched copolymer.
D) Alternating copolymer is formed by only two monomeric units arranged alternatively.

Multiple choice classification of polymers introduction to polymers and its classification polymer polymers chemistry

$Si(Cl) _2(CH _3) _2 \xrightarrow {Hydrolysis} A \xrightarrow {Polymerisation} B (Polymer)$ 


What is/are the use(s) of $B$?

  1. As elastomer, surface coatings.

  2. Life saving substance as blood plasma.

  3. For preparing cooking ware.

  4. Tyre cards production.
Reveal answer Fill a bubble to check yourself
B,C,D Correct answer
Explanation

${ (C{ H } _{ 3 } }) _{ 2 }Si{ Cl } _{ 2 }+{ H } _{ 2 }O\longrightarrow { (C{ H } _{ 3 } }) _{ 2 }SiO+2HCl$


$n[{ (C{ H } _{ 3 } }) _{ 2 }SiO]\xrightarrow { polymerisation } { [{ (C{ H } _{ 3 } }) _{ 2 }SiO] } _{ n }$

The polymer ${ [{ (C{ H } _{ 3 } }) _{ 2 }SiO] } _{ n }$ is used as life saving substance as blood plasma, for preparing cooking ware and tyre production.

Multiple choice classification of polymers introduction to polymers and its classification polymer polymers chemistry

'Koroseal' is a long, chain polymer. When mixed with plasticizers, it forms an excellent plastic. Which one of the following is not the use of it?

  1. For water-proofing

  2. Lining material for tanks

  3. In wire and cable insulation

  4. For sun-shading
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Koreseal is a long chain polymer of vinyl chloride $(CH _2CHCl)$.

Vinyl polymers are heat, electricity and corrosion resistant and are unaffected by exposure to light or by long storage.
When it is mixed with plasticizers, it is used as wall covering paints for water proofing property; lining material for tanks; also used in wire and cable insulation.

Multiple choice classification of polymers introduction to polymers and its classification polymer polymers chemistry

Arrange the following types of polymer in order of decreasing force of attraction.


   Fibres        Elastomer                Thermoplastic
      (I)                 (II)                               (III)

  1. I > II > III

  2. I > III > II

  3. II > I > III

  4. III > II > I
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fiber have strong intermolecular forces of attraction take H-bonding.


Elastomers have weak fores of attraction which thermoplastic have weakest 
forces like london or dispersion forces / vanderwaal forces.

So order is $(I)>(III)>(II)$