Polymer identification via repeat unit analysis

Steps:

• Examine repeat unit structure to identify functional groups, such as chlorine and possibly aromatic rings, indicating a halogenated copolymer.
• Statement 1: Halogenated polymers like this release HCl gas upon burning, making disposal hazardous due to toxicity.
• Statement 2: Presence of distinct segments in repeat unit confirms copolymerization from two monomers, e.g., vinyl chloride and styrene.
• Statement 3: Incorrect, as repeat unit shows copolymer nature, not homopolymer from single chloroethene monomer.

Why A is correct:

• A combines true statements 1 (toxic HCl from Cl in structure) and 2 (alternating units from two monomers per copolymer definition).

Why the others are wrong:

• B includes false 3, as polymer is not PVC homopolymer.
• C omits true 2 about dual monomers.
• D omits true 1 about hazardous burning.

Final answer: A