Identify the polymer from its monomer: polymerisation of chloroprene yields which synthetic rubber?

Introduction / Context:
Chloroprene (2-chloro-1,3-butadiene) is a diene monomer used to make a prominent synthetic rubber with good weathering and oil resistance.

Given Data / Assumptions:

• Chloroprene → polychloroprene (trade name: neoprene).
• Other rubbers have different monomers: butyl rubber from isobutylene with isoprene; thiokol from polysulfide chemistry; polyurethane rubbers from isocyanates and polyols.

Concept / Approach:
Match monomer to the corresponding commercial polymer family and trade name.

Step-by-Step Solution:
Identify chloroprene as the precursor of neoprene.Exclude unrelated rubbers based on different monomer families.

Verification / Alternative check:
Neoprene exhibits notable ozone, oil, and weather resistance due to chlorine in the polymer backbone.

Why Other Options Are Wrong:
Thiokol, butyl, and polyurethane rubbers originate from different chemistries.

Common Pitfalls:
Confusing chloroprene with isoprene; the former yields neoprene, not natural rubber.

Final Answer:
Neoprene