SBR is produced by the copolymerisation of butadiene & styrene by...

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SBR is produced by the copolymerisation of butadiene & styrene by employing emulsion polymerisation. The weight ratio of styrene and butadiene is maintained at

A. 1:3

B. 3:1

C. 1:2

D. 2:1

Answer: Option A

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