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Polymers

Introduction to polymer chemistry including monomers, polymer types (addition and condensation), common synthetic polymers, and polymer properties and processes.

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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following is/are the monomer unit(s) of bakelite?

  1. Isoprene
  2. Styrene
  3. Melamine and formaldehyde
  4. Phenol and formaldehyde
  5. None of the above
Question 2 Multiple Choice (Single Answer)

What is the monomeric unit of neoprene?

  1. 2-chloro-1, 3-butadiene
  2. 1, 3-butadiene
  3. 2-methyl-1, 3-butadiene
  4. 3-methyl-1, 3-pentadiene
  5. None of the above
Question 3 Multiple Choice (Single Answer)

Which of the following polymers is used for making non-stick surface coated utensils?

  1. Bakelite
  2. Neoprene
  3. Polyacrylonitrile (PAN)
  4. Teflon
  5. None of the above
Question 4 Multiple Choice (Single Answer)

What is the name of the monomeric unit of nylon-6?

  1. Caprolactum
  2. Adipic acid and hexamethylenediammine
  3. Phenol and formaldehyde
  4. Styrene
  5. Ethene
Question 5 Multiple Choice (Single Answer)

Which of the following is a copolymer?

  1. Buna-S
  2. Terylene
  3. Polythene
  4. Novolac
  5. None of the above
Question 6 Multiple Choice (Single Answer)

Which of the following is true regarding a polymer?

  1. All polymers are macromolecules but all macromolecules are not polymers.
  2. All macromolecules are polymers but all polymers are not macromolecules.
  3. Polymers having low degree of polymerization are called high polymers.
  4. Starch and cellulose are the examples of synthetic polymers.
  5. All of the above
Question 7 Multiple Choice (Single Answer)

Polyvinylchloride belongs to which category of polymers?

  1. Manmade polymer
  2. Natural polymer
  3. Biodegradable polymer
  4. Semi-synthetic polymer
  5. None of the above
Question 8 Multiple Choice (Single Answer)

What is the linkage involved between monomers of isoprene for the formation of natural rubber?

  1. 2, 4-addition
  2. 1, 4-addition
  3. 1, 4-condensation
  4. 4, 4-addition
  5. 4, 4-condensation
Question 9 Multiple Choice (Single Answer)

Natural rubber is heated with sulphur bridges at many sites between the polymeric chains. What is this process called?

  1. Vulcanization
  2. Oligomerization
  3. Sulphurization
  4. Coplymerization
  5. None of the above
Question 10 Multiple Choice (Single Answer)

Which of the following statements is not true?

  1. Elastomers are rubber like solids with elastic properties.
  2. Fibrous polymers involve strong intermolecular forces.
  3. Thermoplastic polymers soften on heating and harden on cooling.
  4. Thermosetting polymers are infusible due to large number of cross bonds.
  5. All statements are correct
Question 11 Multiple Choice (Single Answer)

What is the percentage of sulphur used in the vulcanization process?

  1. 7%
  2. 1%
  3. 3%
  4. 10%
  5. 5%
Question 12 Multiple Choice (Single Answer)

Which of the following polymers is also known as gutta-purcha?

  1. Trans-polyisoprene
  2. Cis-polyisoprene
  3. Buna-S
  4. Buna-N
  5. None of the above
Question 13 Multiple Choice (Single Answer)

What is the intermediate formed during the formation of bakelite?

  1. Novolac
  2. PAN
  3. PVC
  4. Terylene
  5. None of the above
Question 14 Multiple Choice (Single Answer)

Which of the following types of polymerisation is also called step-growth polymerisation?

  1. Addition polymerisation
  2. Condensation polymerisation
  3. Cross-linked polymerisation
  4. Homopolymerisation
  5. Copolymerisation
Question 15 Multiple Choice (Single Answer)

Which of the following is/are used as initiator(s) in the formation of low density polythene?

  1. Triethylaluminium
  2. Hydrogen peroxide (H2O2)
  3. Ethene
  4. Ziegler-Natta catalyst
  5. All of the above
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