1.

The poly dispersity index `(PDI)` is for - natural polymersA. unitB. higher than unityC. smaller than unityD. higher of smaller than unity depending the nature of monomer

Answer» Correct Answer - A
The `PDI` is unity (i.e., `overline(M_(w)) = overline(M_(n)))` for natural polymers as they are monodispersed. In synthetic polymers, which are always polydispersed, the `PDI` is greater than unity because `overline(M_(w))` is greater than unity


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