A) a polymer of 1, 3-butadiene
B) a polymer of ethylene
C) a polymer of 2-methyl-l, 3-butadiene
D) a polymer of styrene
Correct Answer: C
Solution :
Natural rubber is a polymer of isoprene\[\overset{(2-methyl-1.,\text{ }3-butadiene)}{\mathop{nC{{H}_{2}}=\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}\,-CH=C{{H}_{2}}}}\,\xrightarrow{polymerisation}\] \[\underset{natural\text{ }rubber}{\mathop{{{(-C{{H}_{2}}-\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}\,=CH-C{{H}_{2}}-)}_{n}}}}\,\]
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