Which of the following statement about polymers in correct?A. The number - average molecular `overline(M_(n))` and the weight - average molecular mass, `overline(M_(w))` are expressed by the equations `overline(M_(n)) = (sum N_(i) M_(i))/(sum N_(i))` and `overline(M_(w)) = (sum N_(i) M_(i)^(2))/(sum N_(i) M_(i))` where `N_(i)` is the number of molecular mass `M_(i)` of the species `i`.B. Some physical properties such as freezing point, vapor pressure and osmoric pressure are related directly to `overline(M_(n))` whereas some other physical properties lie light - scattering, sedimantation and difusion constant are related direclty to `overline(M_(w))`C. The ration of the weight - average and number - average molecular masses, `overline(M_(w))//overline(M_(n))` is called poly dispersity index `(PDI)`,D. All of these

Which of the following statement about polymers in correct?A. The numb

1.	Which of the following statement about polymers in correct?A. The number - average molecular `overline(M_(n))` and the weight - average molecular mass, `overline(M_(w))` are expressed by the equations `overline(M_(n)) = (sum N_(i) M_(i))/(sum N_(i))` and `overline(M_(w)) = (sum N_(i) M_(i)^(2))/(sum N_(i) M_(i))` where `N_(i)` is the number of molecular mass `M_(i)` of the species `i`.B. Some physical properties such as freezing point, vapor pressure and osmoric pressure are related directly to `overline(M_(n))` whereas some other physical properties lie light - scattering, sedimantation and difusion constant are related direclty to `overline(M_(w))`C. The ration of the weight - average and number - average molecular masses, `overline(M_(w))//overline(M_(n))` is called poly dispersity index `(PDI)`,D. All of these
Answer» Correct Answer - D `overline(M_(n)) = (sum N_(i) M_(i))/(sum N_(i))` `overline(M_(w)) = (sum N_(i) N_(i)^(2))/(sum N_(i) N_(i))` `PDI = (overline (M_(w)))/(overline(M_(n)))`