(b)
Since $3{^\circ}$ carbocations are most stable, the best way to obtain polyisobutylene is acid catalysed or cationic polymerisation is presence of lewis acid or protonic acid
[image:15_image60.emf]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.