A) Ethylene
B) Acrylic acid
C) 1, 4-buta-diene
D) Isoprene
Correct Answer: D
Solution :
Natural rubber is the polymer of isoprene (2-methyl-butadiene) \[n\cdot \,C{{H}_{2}}==\underset{isoprene}{\mathop{\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,--CH==C{{H}_{2}}}}\,\xrightarrow{polymerisation}\] \[{{\left( \underset{rubber}{\mathop{C{{H}_{2}}--\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,==CH--C{{H}_{2}}}}\, \right)}_{n}}\]
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