1
Monomer of [figure] is
- 2-methylpropene
- styrene
- propylene
- ethene
Answer
(1) 2-methylpropene
Solution
The repeating unit is -C(CH3)2-CH2- (polyisobutylene).
⇒ Putting back the double bond between the two carbons of the repeating unit gives the monomer:
n CH2=C(CH3)2 Polymerisation [ -C(CH3)2-CH2- ]n
∴ The monomer is CH2=C(CH3)2, i.e. 2-methylpropene (isobutylene).
Answer: (1)
Out of syllabusAIPMT 2002