Chemistry - Polymer Question with Solution | TestHub

Question Explanation: PDI for natural polymers.

Concept: Polydispersity Index.

Solution:

PDI abbreviates as polydispersity index of polymer. $\mathrm{PDI}=\frac{{\overline{\mathrm{M}}}_{\mathrm{w}}}{{\overline{\mathrm{M}}}_{\mathrm{n}}}$

For natural polymers PDI=1, i.e., ${\overline{\mathrm{M}}}_{\mathrm{w}}={\overline{\mathrm{M}}}_{\mathrm{n}}$

For synthetic polymers PDI $>1$ i.e., ${\overline{\mathrm{M}}}_{\mathrm{W}}>{\overline{\mathrm{M}}}_{\mathrm{n}}$

Final Answer:

The correct answer is 1 .