The examples of thermoplastics and thermosetting polymers are respectively -

  •  Thermoplastics:polythene, urea-formaldehyde resins ; Thermosetting : bakelite, polystyrene

  •  Thermoplastics: bakelite, polystyrene; Thermosetting : polythene, urea-formaldehyde resins

  • Thermoplastics:polythene, polystyrene ; Thermosetting : bakelite, urea-formaldehyde resins

  •  Thermoplastics:bakelite, urea-formaldehyde resins ; Thermosetting : polythene, polystyrene

The presence of double bonds in rubber molecules increase -

  • Viscosity 

  • Elasticity

  • Surface Tension

  • Vapour pressure

The purpose of vulcanization of rubber is/are -

  • To maintain the elasticity of natural rubber.

  • To improve the tensile strength of natural rubber.

  • To use for a wide range of temperatures.

  • All of the above.

The monomeric repeating units of Nylon-6 and Nylon-6, 6 are respectively -

  • Nylon 6 - Caprolactam; Nylon-6,6 - hexamethylene diamine and adipic acid

  • Nylon 6 - hexamethylene diamine and adipic acid; Nylon-6,6 - Caprolactam

  • Nylon 6 - Caprolactam and adipic acid; Nylon-6,6 - hexamethylene diamine

  • Nylon 6 - pentaethylene diamine and adipic acid; Nylon-6,6 - Caprolactam

The names  of the monomer/s of the following polymers are respectively -

(i) Buna-S   (ii) Buna-N
(iii) Dacron  (iv) Neoprene

1) 1,3-butadiene and styrene, 1,3-butadiene and acrylonitrile, terepthalic acid and ethylene glycol, chloroprene

2) 1,3-butadiene and  acrylonitrile, 1,3-butadiene and styrene, chloroprene, terepthalic acid and ethylene glycol

3) 1,3-butadiene and styrene, 1,3-butadiene and  acrylonitrile, chloroprene, terepthalic acid and ethylene glycol

4) Chloroprene, terepthalic acid and ethylene glycol, 1,3-butadiene and styrene, 1,3-butadiene and acrylonitrile
  • 1
  • 2
  • 3
  • 4

The monomer in the following polymeric structures are respectively -

(i)

 

(ii) 

 

  • Decanoic acid and hexamethylene diamine; hexamethylene diamine and formaldehyde

  • Hexamethylene diamine and formaldehyde; hexamethylene diamine and decanoic acid

  • Decanoic acid and tetramethylene diamine; tetramethylene diamine and formaldehyde

  • Tetramethylene diamine and formaldehyde; decanoic acid and tetramethylene diamine

The salient  feature of biodegradable polymer is -

  • Polymer that can be decomposed.

  • Polymer that can not be decomposed.

  • Polymer that can be denatured.

  • Polymer that can not be denatured.

The common chain initiator amongst the following in a free radical reaction is :

 

  • Benzoyl peroxide.

  • Ozone.

  • Chlorine.

  • None of the above.

The incorrect statement regarding condensation polymer is:

 

  • Reaction occurs between two different bi-functional or tri-functional monomers.

  • Elimination of small molecules like water ammonia etc, takes place.

  • Nylon 6,6 is an example of condensation polymer.

  •  Elimination of large molecules like butanol takes place.

Which one of the following polymers are prepared by addition polymerization?
  • Novolac 
  • Dacron 
  • Teflon 
  • Nylon-66 

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