Addition Polymerization of Alkenes

Steps:

• Monomer is prop-2-en-1-ol (CH₂=CHCH₂OH), with double bond between C2-C3.
• Addition polymerization opens the C=C double bond, forming single bonds between monomers.
• Carbon 1 (CH₂OH) becomes a side chain on C2.
• Repeat unit is -[CH₂-CH(CH₂OH)]-.

Why B is correct:

• B depicts -[CH₂-CH(CH₂OH)]-, matching the standard addition polymer structure where the double bond adds across C2-C3, per Markovnikov-free vinyl polymerization rules.

Why the others are wrong:

• A: Shows linear -[CH₂CH₂CH₂OH]-, ignoring the branched alkene structure.
• C: Includes ester linkage, assuming condensation instead of addition.
• D: Places OH on the chain backbone, altering the monomer's connectivity.

Final answer: B