Tag: introduction to polymers and its classification

Questions Related to introduction to polymers and its classification

Which of the following polymers does not soften on heating?

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

  1. Bakelite

  2. Polythene

  3. Polystyrene

  4. PVC

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Correct Option: A
Explanation:

Bakelite is a thermosetting polymer having high crosslinkings and hence once hardened cannot be softened.

The weakest interparticle forces are present in:

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

  1. Thermosetting polymers

  2. Thermoplastic polymers

  3. Fibers

  4. Elastomers

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Correct Option: D
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.

Artificial silk is a ___

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

  1. polypeptide

  2. polysaccharide

  3. polythene

  4. polyvinyl chloride

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Correct Option: B
Explanation:

Artificial silk is a synthetic manufactured from cellulose fibre. Cellulose is a common example of polysaccharides. Thus, artificial silk is a polysaccharide.

The products of addition polymerisation reaction is:

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

  1. PVC

  2. nylon

  3. terylene

  4. polyamide

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Correct Option: A

Rayon is chemically known as:

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

  1. cellulose nitrate

  2. cellulose

  3. cellulose acetate

  4. resins

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Correct Option: C
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.

Glyptal or alkyd is polymer of :

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

  1. Ethylene glycol and phthalic acid

  2. Ethylene and phthalic acid

  3. Phthalic acid and acetylene

  4. None of the acid

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Correct Option: A

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

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

  1. PHBV

  2. nylon-2-Nylon-6

  3. dextran

  4. dacron

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Correct Option: C

Which of the following is used in conveyor belt?

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

  1. PVC

  2. Polythene

  3. Neoprene

  4. none of these

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Correct Option: A,B,C
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 $\text{C}$

If a polythene sample contains two monodisperse fractions in the ratio $2:3$ with degree of polymerization $100$ and $200$, respectively, then its weight average molecular weight will be:

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

  1. $4480$

  2. $4600$

  3. $4300$

  4. $5200$

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Correct Option: A

Which of the following is not true?

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

  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.

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Correct Option: B