Question:
Buna-S is a polymer of monomers X and Y. If X is $CH_{2}=CH-CH=CH_{2}$ then what is Y?
Buna-S is a polymer of monomers X and Y. If X is $CH_{2}=CH-CH=CH_{2}$ then what is Y?
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Buna-S: "S" stands for Styrene. Styrene is just a benzene ring ($C_{6}H_{5}$) with a vinyl group attached.
Updated On: Jul 4, 2026
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The Correct Option is B
Solution and Explanation
Step 1: Concept
Buna-S is a synthetic copolymer also known as SBR (Styrene-Butadiene Rubber).
Step 2: Meaning
The name "Buna-S" comes from Butadiene (Bu), Sodium (Na) as the catalyst, and Styrene (S).
Step 3: Analysis
Monomer X is 1,3-Butadiene. Monomer Y must be Styrene, which has the chemical formula $C_{6}H_{5}CH=CH_{2}$.
Step 4: Conclusion
Therefore, Y is Styrene, represented by option B. Final Answer: (B)
Buna-S is a synthetic copolymer also known as SBR (Styrene-Butadiene Rubber).
Step 2: Meaning
The name "Buna-S" comes from Butadiene (Bu), Sodium (Na) as the catalyst, and Styrene (S).
Step 3: Analysis
Monomer X is 1,3-Butadiene. Monomer Y must be Styrene, which has the chemical formula $C_{6}H_{5}CH=CH_{2}$.
Step 4: Conclusion
Therefore, Y is Styrene, represented by option B. Final Answer: (B)
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