Polymer Statement Analysis

This question requires identifying the wrong statement concerning polymer properties and preparation.

Evaluating Polymer Statements

• Latex Coagulation: Latex, a colloidal dispersion, can be effectively coagulated by adding dilute acids like acetic acid. This process neutralizes charges and causes the rubber particles to clump together. Thus, this statement is correct.
• Styrene-Butadiene Rubber (SBR) Synthesis: SBR is a widely used synthetic rubber produced commercially via emulsion polymerization. This statement is correct.
• Vulcanized Rubber Structure: Vulcanization involves cross-linking polymer chains, typically with sulfur. This creates a 3-D network structure, significantly improving the rubber's strength, elasticity, and durability. This statement is correct.
• Guttapercha Isomerism: Guttapercha is a natural polymer known to be the trans isomer of polyisoprene (\text{trans-1,4-polyisoprene}). Natural rubber, conversely, is the cis isomer (\text{cis-1,4-polyisoprene}). Therefore, the statement "Guttapercha is cis-polyisoprene" is factually incorrect.

Identifying the Incorrect Statement

The statement that incorrectly identifies Guttapercha as cis-polyisoprene is the one to be picked.

Conclusion: The wrong statement is that Guttapercha is cis-polyisoprene.