Which amongst the following is the repeating unit of natural rubber?

2-Methyl-1,3-butadiene

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2-Methyl-2-butene

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2-ethyl-2-propene

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2-Methy-1,2-butadiene

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Solution

The correct option is B 2-Methyl-2-butene
Natural rubber is a homopolymer obtained from the latex of the rubber tree.
It has isoprene (2-methyl-1,3-butadiene) as its monomer.
During polymerisation, it forms 2-methyl-2-butene, which becomes the repeating unit of natural rubber.

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