Question

The monomers of Buna-S rubber are:

• A. \( \text{Isoprene and butadiene} \)
• B. \( \text{Butadiene and phenol} \)
• C. \( \text{Styrene and butadiene} \)
• D. \( \text{Vinyl chloride and sulphur} \)

Hint:

Buna-S rubber is a copolymer of styrene and butadiene, extensively utilized in tire manufacturing for its durability and resistance to abrasion.

Answer 1

The Correct Option is C

Buna-S, also known as styrene-butadiene rubber, is a synthetic polymer produced through the copolymerization of: \[ \text{Butadiene (CH}_2\text{=CH-CH=CH}_2\text{)} \quad \text{and} \quad \text{Styrene (C}_6\text{H}_5\text{-CH=CH}_2\text{)}. \] This process follows a 3:1 ratio of butadiene to styrene. Buna-S is commonly used in the production of automobile tires because of its high durability and resistance to wear. Other options: - Isoprene is the primary monomer used in natural rubber.
- Phenol and vinyl chloride do not form part of Buna-S's composition. Final Answer: \[ \boxed{\text{Styrene and butadiene}} \]