Tag: introduction to polymers and its classification

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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.

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

A polymer which is used as a suture, i.e., for stiching of wounds after operations is 

  1. PHBV

  2. nylon-2-Nylon-6

  3. dextran

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

Dextran is a complex branched glucan used as a plasma volume expander and in some surgical applications, but biodegradable polymers like PHBV or polyglycolic acid are more common for sutures. However, in the context of standard chemistry curricula, Dextran is often cited for its biocompatibility.

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

Which of the following is used in conveyor belt?

  1. PVC

  2. Polythene

  3. Neoprene

  4. none of these
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation

In order to move the belt and the material to transport one or both the pulleys should be power-driven. These belts are generally made of rubber, PVC, Urethane, Neoprene, Nylon, Nitrile, Polyester, leather, polythene and others. The industrial conveyor belts are made up of multiple layers of material.


Hence, the correct options are $\text{A}, \text{B}$ and $\text{C}$

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

Which of the following is not true?

  1. Step growth polymerisation required a bifunctional monomer.
  2. Nylon $6$ is an example of step- growth polymerisation
  3. Nylon $6$ is an example of Chain growth polymerisation.

  4. Chain growth polymerisation involves homopolymerisation only.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nylon 6 is formed by the ring-opening polymerization of caprolactam, which is a type of chain-growth polymerization, not step-growth. Therefore, the statement that it is step-growth is false.