KCET2012ChemistryPolymers
The s-block element used as a catalyst in the manufacture of Buna-S rubber is
Options
- ACa
- BMg
- CNa
- DAll of the above
Correct answer
C. Na
Step-by-step solution
Butadiene ( 75 % ) and styrene (25 %) polymerise in the presence of sodium to give Buna-S-rubber.