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JEE Main levelSingle correct optionDifficulty 2 of 3pl124

Natural rubber and gutta-percha are

Aboth cis-1,4-polyisoprene
Bcis-1,4-polybutadiene and trans-1,4-polybutadiene respectively
Ccis-1,4-polyisoprene and trans-1,4-polyisoprene respectively
Dtrans-1,4-polyisoprene and cis-1,4-polyisoprene respectively

Answer: C

Both are polymers of 2-methylbuta-1,3-diene (isoprene). Natural rubber has all-cis double bonds; gutta-percha has all-trans double bonds.

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