Tag: polymers

Questions Related to polymers

Which is found as both straight-chained and branched polymers?

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

  1. Nucleic acids

  2. Carbohydrates

  3. Proteins

  4. Electrolytes

  5. Lipids

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Correct Option: B
Explanation:

Carbohydrates are found as both straight-chained and branched polymers.


For example, cellulose is unbranched polymer and glycogen is branched polymer.

Hence option B is correct.

Important constituent of cell wall is:

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

  1. lipid

  2. cellulose

  3. protein

  4. vitamin

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Correct Option: B
Explanation:

Cellulose (-a long chain un-branched polymer) is an important constituent of cell wall. It is principle component of plant structure. It supports the weight of the plant.

Identify the heteropolymer from the list given below.

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

  1. Polythene

  2. Nylon-6

  3. Teflon

  4. Nylon-6, 6

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Correct Option: D
Explanation:
A hetero-polymer derived from two or more different (but often similar) types of monomer. Nylon 66 is made of two monomers each containing 6 carbon atoms, hexamethylenediamine and adipic acid, which give nylon 66 its name
Polythene, nylon-6 and teflon are homo polymers.

Three dimensional polymers with cross links formed in case of:

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

  1. Thermoplastic

  2. Thermosetting plastic

  3. Both a) and b)

  4. None of these

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Correct Option: B
Explanation:

Thermosetting plastic have three dimensional network with cross linkage.When thermosetting plastics are heated they became hard.

Which polymers occur naturally?

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

  1. Starch and nylon

  2. Cellulose and nylon

  3. Starch and cellulose

  4. Protiens and PVC

Show answer
Correct Option: C
Explanation:

 Starch and cellulose are natural polymers. Nylon, rubber etc. are synthetic polymers.

so correct answer is C.

Which of the following is thermally stable?

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

  1. Silicone polymers

  2. Rayon

  3. Bakelite

  4. Perlon - L

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Correct Option: A
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.

Which of the following is an organic polymer?

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

  1. Glass

  2. Rayon

  3. Silicone rubbers

  4. All

Show answer
Correct Option: B
Explanation:

Rayon is a manufactured regenerated cellulose fibre. Therefore, it is an organic polymer but glass and silicon rubber are examples of non-organic polymer made up of silicone - silicone bond structure.

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-

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

  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

Show answer
Correct Option: C
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.

Which of the following are highly crossed linked polymers?

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

  1. Alkyd resin

  2. Melamine

  3. Bakelite

  4. Urea - formaldehyde

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Correct Option: A,B,C,D

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


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

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

  1. As elastomer, surface coatings.

  2. Life saving substance as blood plasma.

  3. For preparing cooking ware.

  4. Tyre cards production.

Show answer
Correct Option: B,C,D
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.