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The molecular weight of the step polymers is not the _________

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The molecular weight of the step polymers is not the _________

(a) Sum of the molecular weights of monomer

(b) Sum of the molecular weight of some monomers

(c) Sum of the water molecular weight

(d) Sum of the weights of the bi-products.

I have been asked this question in final exam.

Question is taken from Mechanism of Polymerization in chapter High Polymers and Plastics of Applied Chemistry

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The correct choice is (a) Sum of the molecular weights of monomer

For explanation I would say: The molecular weights of the step polymers is not the sum of the molecular weights of the monomers. The elimination of the bi-products is done.

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