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I: Polystyrene, II: Orlon and III: Dacron
The above polymers are classified as
I II III
(A) Chain growth Step growth Step growth
(B) Chain growth Chain growth Step growth
(C) Chain growth Step growth Chain growth
(D) Step growth Step growth Step growth

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(B)

(D)

(A)

(C)

answer is B.

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Detailed Solution

Chain growth polymerization involves most of the additional reaction polymerization. The growing chains do not react with each other and no small molecule is liberated.

Example: Polyethylene, polystyrene, orlon etc.

Step growth polymerization involves most of the condensation reaction polymerization. It is a stepwise reaction between functional groups of monomers.

Example: Polyester, dacron etc.

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