Tag: polymers

Questions Related to polymers

The basis on the mode of their formation, the polymers can be classified:

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

  1. As addition polymers only

  2. As condensation polymers only

  3. As copolymers

  4. Both as addition and condensation polymers

Show answer
Correct Option: D
Explanation:

On the basis of the mode of their formation, the polymers can be classified as addition polymers and condensation polymers.
Addition polymers are formed by chain growth polymerization and condensation polymers are formed by the combination of two monomers by the elimination of a small molecule like water or methyl alcohol.


Option D is correct.

Woolen clothes are mostly used in:

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

  1. summer days

  2. rainy days

  3. cold days

  4. cloudy days

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Correct Option: C
Explanation:

Woolen clothes are mostly used in Cold days. They trap our body heat and provide us warmth in the winters.

Removal of fleece of sheep with skin is

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

  1. Shaving

  2. Refining

  3. Shearing

  4. None of the above

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Correct Option: C
Explanation:

The fleece of the sheep along with a thin layer of skin is removed from its body. This process is called shearing. 

Polyethene is produced by :

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

  1. isomerization

  2. polymerisation

  3. hydrogenation

  4. all of the above

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Correct Option: B
Explanation:

Polymerization is the process of reacting monomer molecules together in a chemical reaction to form polymer chains or three dimensional networks.There are many forms of polymerization like step growth and chain growth.It occurs via variety of reaction mechanisms due to functional groups present and their steric effects.

The monomer units of neoprene are known as:

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

  1. isoprene

  2. chloroprene

  3. vinyl chloride

  4. ethylene glycol

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Correct Option: B

Which one of the following polymers is not properly matched to its monomer?

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

  1. orion - acrylonirtile

  2. synthetic rubber- 2 -chlorobuta - 1, 3 - diene

  3. nylon - adipic acid & hexamethylene diamine

  4. teflon - vinyl chloride

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Correct Option: D
Explanation:

The Monomer of Teflon is tetrafluoroethylene, where vinyl chloride is the monomer of PVC.


So, the correct option is $D$

Monomer of polythene is :

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

  1. propene

  2. isoprene

  3. chloroprene

  4. ethene

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Correct Option: D
Explanation:

Polyethylene is the most common plastic. The monomer is ethylene, a gaseous hydrocarbon with the formula ${ C } _{ 2 }{ H } _{ 4 }$ which can be viewed as a pair of methylene groups connected to each other. As it is highly reactive, the ethylene must be of high purity.

Which one of the following is a phenolic resin similar to Bakelite?

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

  1. Catalin

  2. Melamine

  3. Celluloid

  4. Crystalate

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Correct Option: A
Explanation:

Catalin is a brand name for a thermosetting polymer that was popular from the 1930s. It is another phenolic resin, similar to Bakelite, but with different mineral fillers that allowed the production of light colors. Like Bakelite, it gives off a distinctive phenolic odour when heated.

Which of the following plastic has only aliphatic carbon atoms in their backbone chains?

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

  1. Polyamide

  2. Polyacetal

  3. Polypropylene

  4. Teflon

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Correct Option: C

The necessary condition for a compound to form fibre is that

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

  1. its molecules must be linear

  2. its molecules must be spherical

  3. its molecules must be rectangular

  4. its molecules must be hexagonal

Show answer
Correct Option: A
Explanation:

All polymers cannot form fibres. The key requirement of a fibre forming polymer is that the molecule must be linear. This permits their side by side alignment.

Option A is correct.