Which of the following is correct ?

Options

A. `bar(M_(w))`, of a polymer is greater than `bar(M_(n))`
B. `bar(M_(n))`, of a polymer is greater than `bar(M_(w))`
C. For synthetic polymers PDI is greater than I
D. During vulcanization rubber becomes cross linked with zinc oxide

Answer

A, C

Explanation

`bar(M)_(w) gt bar(M)_(n)` synthetic polymers PDI is greater than I