Q. The monomer of the polymer : (CH₃)₃C–CH₂–C⁺(CH₃)₂ is :
A) H₂C=C(CH₃)₂
B) (CH₃)₂C=C(CH₃)₂
C) CH₃CH=CH·CH₃
D) CH₃CH=CH₂
Explanation
[Solution from source] (CH₃)₃C–CH₂–C⁺(CH₃)₂ is the growing chain in cationic polymerisation of isobutylene: each step adds a CH₂=C(CH₃)₂ unit. So the monomer is H₂C=C(CH₃)₂. Tetramethylethylene or propene cannot produce this repeating pattern. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.