Chemistry - Polymer Question with Solution | TestHub

Question Explanation:

The question asks to identify which of the given monomers is most susceptible to polymerization via a free radical mechanism.

Concept:

This question is based on free radical polymerization and  stability of free radicals.

Solution: Free radical polymerization ease correlates directly with radical intermediate stability. Styrene (C₆H₅ CH=CH₂ ) forms the most stable benzylic radical due to resonance with its phenyl ring, making it the easiest to polymerize compared to propene (secondary radical) and ethene (primary radical, minimal stabilization). Therefore, styrene polymerizes most easily.

Final Answer: The correct option is (B).