A) Caprolactam is the monomer of nylon-6
B) Terylene is a polyester polymer
C) Phenol formaldehyde resin is known as bakelite
D) The monomer of natural rubber is butadiene
Correct Answer: D
Solution :
Natural rubber or as-poly isoprene is a polymer of isoprene units, ie, 2-methyl buta-1, 3-diene. \[nC{{H}_{2}}=\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \\ isoprene \end{smallmatrix}}{\mathop{C}}\,-CH=C{{H}_{2}}\xrightarrow{Polymerisation}\] \[\underset{polyisoprene}{\mathop{{{\left[ -C{{H}_{2}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,=CH-C{{H}_{2}}- \right]}_{n}}}}\,\]
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