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Q. The $PDI$ for the natural polymers is generally close to...

NTA AbhyasNTA Abhyas 2022

Solution:

For the natural polymers, the $PDI$ (Polydispersity Index) is generally equal to $1$ , which means that they are monodisperse. Such polymers are more homogeneous.
It is calculated as the ratio of the weight average by the number average molecular weight.