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Cellulose diacetate polymer is

$\begin{array}{1 1}(a)\;\text{Synthetic polymer}&(b)\; \text{Natural polymer}\\(c)\;\text{Semisynthetic polymer}&(d)\;\text{Both (b) and (a)}\end{array}$

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Cellulose is a naturally occuring polymers.Cellulose on acetylation with acidic anhydride in the presence of sulphuric acid forms cellulose diacetate polymer which is used in making threads,films & glasses.So its a semi synthetic polymer.
Hence (c) is the correct answer.
answered Mar 11, 2014 by sreemathi.v
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