Q. The number average molecular mass and mass average molecular mass of a polymer are respectively 30,000 and 40,000. The poly dispersity index of the polymer is
A) <1
B) >1
C) 1
D) 0
Explanation
(b)
$PDI = \frac{{\overline{M}}_{w}}{{\overline{M}}_{n}} = \frac{40,000}{30,000}$
So, the value is more than 1.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.