A) butadiene and isoprene
B) butadiene and acrylonitrile
C) isoprene and ethylene diamine
D) isoprene and butyl diamine
Correct Answer: B
Solution :
Buna-N is synthetic rubber which is polymer of butadiene with acrylonitrite. \[\underset{1,3-butadiene}{\mathop{n\,C{{H}_{2}}=CH-CH=C{{H}_{2}}}}\,\] \[\underset{acrylonitrile}{\mathop{+\,\,n\,C{{H}_{2}}=CH-CN}}\,\] \[+3HCHO+N{{H}_{3}}\]
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