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How is PVC made soft?

$\begin{array}{1 1}(a)\;\text{By adding HCl}\\(b)\; \text{By adding }CH_3COOH\\(c)\;\text{ By adding di-n-heptyl phphalate}\\(d)\;\text{By adding di-n-butyl phphalate}\end{array}$

1 Answer

Polyvinyl chloride (PVC) is very stiff and hard but it is made soft by adding di-n-butyl phthalate(a plasticizer)
Hence (d) is the correct answer.
answered Mar 12, 2014 by sreemathi.v
 
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