Short Answer Type

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Explain with suitable examples:
(i)    Natural polymers
(ii)   Synthetic polymers.


(i) Natural polymers: Polymers found in nature, mostly from plants and animals, are called natural polymers. Examples are starch, cellulose, proteins, nucleic acids and natural rubber.

(ii) Synthetic polymers: Polymers synthesised by human in laboratory or factory are called synthetic polymers. Examples are polypropylene, nylon-66, polybutadiene, polyvinyl chloride (PVC), phenol formaldehyde (Bakelite), polyester (Terylene).


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Long Answer Type

What are linear polymer and branched chain polymers? How do these differ from own linked polymers?

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Short Answer Type

Write the names and molecular structure of the monomers of the following:
(i) Natural rubber (ii) Neoprene.

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Long Answer Type

Explain how does 1, 3-butadiene polymerize by different routes?
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Why does styrene undergo anionic polymerization easily?
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Short Answer Type

Write the names and structures of the monomers of the following polymers:
(i) Polystyrene (ii) Neoprene.

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Define a polymer. Write the monomer used for the preparation of dacron. Mention a use of it.

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Long Answer Type

Give the monomers and uses of each of the following addition polymers:
(a) Polyethylene    

(b) Polypropylene       

(c) Polystyrene.

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Elaborate the structure of natural rubber.

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How does the presence of benzoquinone inhibit the free radical polymerization of a vinyl derivative?
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