A) isoprene
B) adipic acid
C) vinyl chloride
D) acrylonitrile
Correct Answer: A
Solution :
Key Idea: Monomer polymerize to form polymers. (a) \[\underset{\begin{smallmatrix} \,\,\,\,\,\,\,\,\,\,\text{isoprene} \\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\text{or} \\ 2-\text{methyl}\,1,3-\text{butadiene} \end{smallmatrix}}{\mathop{C{{H}_{2}}=\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,-CH=C{{H}_{2}}}}\,\] It is monomer of natural rubber. (b) Adipic acid is copolymer of nylon-66. (c) Vinyl chloride is monomer of PVC. (d) Acrylonitrile is monomer of PAN.
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