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The polymerization process in which two...

The polymerization process in which two or more chemically different monomers take part to form a polymer is called

A

Addition polymerisation

B

Copolymerisation

C

Chain polymerisation

D

Homopolymerisation

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The correct Answer is:
B
Adipic acid +Hexamethylenediamine ` to `Nylon -66
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Monomers are simple molecules, which combine with each other to form polymers. Each polymer has a repeating structural unit. Polymers formed the same type of monomers are called homopolymers and if two or more different repeating units (monomers) make up the polymer, it is known as a copolymer. Both homopolymers and copolymers may be formed either by addition or condensation reactions. Alkenes and diense polymerize by addition (chain growth) mechanism involving carbocations, carbanions or free radical intermediates. Diense (Chloroprene, isoprene, etc) polymerize by 1,4-addition mechanism to give cis- or trans- polymers. Natural rubber is, however, cis- polyisoprene. Natural rubber is quite soft and flexible but these properties can be improved by a process called vulcanization. In contrast, bifunctional monomer molecules undergo condensation or step-growth polymerization. Polymers which can be heated and reshaped as many times as desired are called thermoplastics (polythene, polystyrene, PVC teflon, etc.) while those which can be heated only once to give a particular shape are called thermosetting polymers (Bakelite, Melmac, etc). Vinyl chloride is the repeating unit in:

Monomers are simple molecules, which combine with each other to form polymers. Each polymer has a repeating structural unit. Polymers formed the same type of monomers are called homopolymers and if two or more different repeating units (monomers) make up the polymer, it is known as a copolymer. Both homopolymers and copolymers may be formed either by addition or condensation reactions. Alkenes and diense polymerize by addition (chain growth) mechanism involving carbocations, carbanions or free radical intermediates. Diense (Chloroprene, isoprene, etc) polymerize by 1,4-addition mechanism to give cis- or trans- polymers. Natural rubber is, however, cis- polyisoprene. Natural rubber is quite soft and flexible but these properties can be improved by a process called vulcanization. In contrast, bifunctional monomer molecules undergo condensation or step-growth polymerization. Polymers which can be heated and reshaped as many times as desired are called thermoplastics (polythene, polystyrene, PVC teflon, etc.) while those which can be heated only once to give a particular shape are called thermosetting polymers (Bakelite, Melmac, etc). Propene, styrene and ethylene glycol are:

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ERRORLESS -BIOMOLECULES AND POLYMER-Ordinary Thinking (General methods of preparation and mechanisms of polymerisation)
  1. Match the following correctly

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  2. The monomers used for the synthesis of nylon-2-nylon-6 are :

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  3. The polymerization process in which two or more chemically different ...

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  4. Which one of the following polymers will NOT catch fire ?

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  5. The starting materials for the preparation of styrene is

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  6. Rayon yarns are obtained from

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  7. A raw meterial used in making nylon is

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  8. Natural rubber is

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  9. In the preparation of Nylon -6 from chyclohexanone oxime use is made o...

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  10. Which polymer manufactured by condensation polymerization is

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  11. Example of condensation polymer is

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  12. Polymer formation from monomers starts by:

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  13. Buna-N synthetic rubber is a copolymer of:

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  14. The species which can best serve as an initiator for the cationic poly...

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  15. Acetate rayon is prepared from

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  16. When condensation product of hexamethylenediamine and adipic acid is h...

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  17. The s-block element used as a catalyst in the manufacture of buna-S ru...

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  18. Which of the following pair of monomers are used in preparation of PHB...

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  19. Which of the following is a syndiotactic polymer in [-CH(2)-C(YZ)-](n)

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  20. Polymers of the type Z-Mn-Y , i.e those which contain a foreign molecu...

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