A) Vinyl chloride and sulphur
B) Butadiene
C) Styrene and butadiene
D) Isoprene and butadiene
Correct Answer: C
Solution :
Buna-S rubber is also called SBR i.e., styrene -butadiene rubber. It is a copolymer of 75% butadiene \[(C{{H}_{2}}=CH-CH=C{{H}_{2}})\] and 25% styrene \[({{C}_{6}}{{H}_{5}}-CH=C{{H}_{2}})\]
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