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  4. Synthetic polymer which resembles natural rubber is:

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Q. Synthetic polymer which resembles natural rubber is:

VMMC MedicalVMMC Medical 2006

Solution:

Neoprene is the polymer of chloroprene (2-chloro-but 1, 3-diene). It resembles in appearance with natural rubber. $ nC{{H}_{2}}=CH-\underset{Cl}{\mathop{\underset{|}{\mathop{C}}\,}}\,=C{{H}_{2}}\xrightarrow{\text{polymerisation}} $ $ -{{\left[ -C{{H}_{2}}-CH=\underset{\begin{smallmatrix} \,\,\,\,\,\,\,Cl \\ \,\,\,\,\,\,\,\text{Neoprene} \end{smallmatrix}}{\mathop{\underset{|}{\mathop{C}}\,}}\,-C{{H}_{2}}- \right]}_{n}}- $