Natural rubber and gutta-percha respectively, are ___.

cis-polyisoprene and trans-polyisoprene

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both are cis-polyisoprene

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both are trans-polyisoprene

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trans-polychloroprene and cis-polychloroprene

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Solution

The correct option is A cis-polyisoprene and trans-polyisoprene
Natural rubber and gutta-percha respectively, are cis-polyisoprene and trans-polyisoprene.
Isoprene is 2-methyl-1,3-butadiene.
Natural rubber has long flexible chains, weak intermolecular forces and exhibits elastic properties.
Gutta-percha has zigzag chains fitting in one another. It is non elastic and crystalline.

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