Polydispersity Index

Q. What is the formula for PDI?

1. $\frac{\overline{M_n}}{\overline{M_w}}$
2. $\frac{\overline{M_W}}{\overline{M_n}}$
3. $\frac{{\overline{M_W}}^2}{\overline{M_n}}$
4. $\frac{\overline{M_W}}{{\overline{M_n}}^2}$

Q. The mass average molecular weight and number average molecular weight of a polymer are respectively 40000 and 30000. The poly-dispersity index of the polymer will be

1. <1
2. >1
3. 1
4. \N

Q. The mass average molecular weight and number average molecular weight of a polymer are respectively 40000 and 30000. The poly-dispersity index of the polymer will be

1. <1
2. >1
3. 1
4. \N