Tag: polymers

Quizzes (12) Questions (105)

Questions Related to polymers

Multiple choice types of polymerisation reactions condensation polymerisation polymer polymers chemistry

Hair sprays generally contain resins in a volatile solvent. Upon drying, they leave a thin film that holds the hair in place. Which of the following is a resin used in hair spray?

  1. Polyester

  2. Polyvinyl alcohol

  3. Polyvinyl pyrrolidone (PVP)

  4. Polythene
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
$PVP$ (Polyvinyl pyrrolidone) is a versatile ingredient which is used in cosmetics and beauty industry as a bindes, film former, emulsion stabilizer, suspending agent and hair fixative used in products like mascara, eyeliner, hair conditioners, hair sprays and shampoos.
Multiple choice types of polymerisation reactions condensation polymerisation polymer polymers chemistry

Which of the following polymers can be made by condensation polymerisation reaction?

  1. Dacron
  2. Nylon - $6,\: 6$

  3. Bakelite

  4. Polyethylene
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation

Condensation polymers are formed by repeated condensation reactions between two different bi-functional or tri-functional monomeric units. In these polymerisation reactions, the elimination of small molecules such as water, alcohol, hydrogen chloride, etc. takes place. 

Dacron, Nylon-6.6 and Bakelite are produced by condensation polymerisation.

On the other hand, Polyethylene is formed by breakage of the double bond and there is no elimination of molecules.


Multiple choice types of polymerisation reactions condensation polymerisation polymer polymers chemistry

Which of the following is/are not a condensation copolymer?

  1. Nylon-$6$
  2. Nylon-$6,6$

  3. Dacron

  4. PVC
Reveal answer Fill a bubble to check yourself
A,D Correct answer
Explanation
The condensation polymers are formed by repeated condensation reaction between two different bi-functional or tri-functional monomeric units. 

In these polymerisation reactions, the elimination of small molecules such as water, alcohol, hydrogen chloride, etc. take place. The examples are terylene (dacron), nylon 6, 6, etc. For example, nylon 6, 6 is formed by the condensation of hexamethylenediamine with adipic acid.

When two different types of monomers are joined in the same polymer chain, the polymer is called a copolymer. 
Nylon 6 is a condensation polymer but it's not a co-polymer.
PVC is an addition polymer.

Hence, options A and D are correct.
Multiple choice types of polymerisation reactions condensation polymerisation polymer polymers chemistry

Nylon-$6$ is prepared by linear condensation homopolymerization reaction of: 

  1. caprolactum

  2. hexamethylene diamine and adipic acid
  3. $6$-aminohexanoic acid

  4. acrylonitrile
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Solution:- (A) Caprolactam

Nylon-$6$ is prepared by linear condensation homopolymerization reaction of caprolactam.
$n \left( \text{Caprolactum} \right) \xrightarrow[{N} _{2}]{533 \; K} \text{Nylon}-6$

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

The weakest interparticle forces are present in:

  1. Thermosetting polymers

  2. Thermoplastic polymers

  3. Fibers

  4. Elastomers
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 Elastomers: The polymer chains are held together by the weakest intermolecular forces. These weak binding forces permit the polymer to be stretched.


Fibres: Fibers have strong intermolecular forces like hydrogen bonding. These strong forces also lead to close packing of chains and thus impact crystalline nature.

Thermoplastic polymers: They possess intermolecular forces of attraction intermediate between elastomers and fibers.

Thermosetting polymers: They are cross-linked & heavily launched.

Hence, option D is correct.

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

The products of addition polymerisation reaction is:

  1. PVC

  2. nylon

  3. terylene

  4. polyamide
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Addition polymerization involves the repeated addition of monomers containing double or triple bonds without the loss of small molecules. PVC (polyvinyl chloride) is formed from vinyl chloride monomers via addition polymerization.

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

Rayon is chemically known as:

  1. cellulose nitrate

  2. cellulose

  3. cellulose acetate

  4. resins
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Rayon is chemically known as cellulose acetate, which is a semi-synthetic kind of polymer.

It is considered as semi-synthetic because it has natural component cellulose which combined with acetate gives cellulose acetate (rayon)

Option C is correct.