What is Buna-S ?

Explain the preparation of Buna-S.

The s-block element used as a catalyst in the manufacture of Buna-S rubber is

(a) How is Buna-N prepared? Give equation (b) Name the monomers of Nylon-6, 6. (c) What are thermosetting polymers?

(a) How is Buna-N prepared ?. Write the equation (b) Give one example for a non-biodegraduble polymer

Answer any FOUR of the following questions. a. How is Buna-N prepared? Give equation.

Let S_n denote the sum of first n terms of an AP and 3S_n=S_(2n) What is S_(3n):S_n equal to? What is S_(3n):S_(2n) equal to?